Backend Development is a critical part of any website or software product. It starts with understanding the client's goals and developing solutions that achieve those goals in a cost-effective and scalable way. Backend developers are responsible for more than just code: they have to have a strong understanding of databases, frameworks, and development in general. A backend developer uses this knowledge to turn complicated customer requirements into a efficient, automated solutions that the user experience (UX) team can work with.

When it comes to Backend Development, experience matters - you want someone who's seen a variety of projects and knows the best technology to use for your specific scenario.

Here's some projects that our expert Backend Developer made real:

  • Developing connected systems between websites and local servers
  • Integrating software systems using modern real-time protocols
  • Building bespoke solutions tailored to customer requirements
  • Taking over existing projects and resolving tricky bugs
  • Developing custom solutions using tried and tested frameworks

Backend Development encompasses a wide variety of skills and technologies, so it helps to have an experienced developer on your team who can navigate the complexities of building high-quality solutions. Our expert developers have already undertaken a variety of different projects and can jump into yours with confidence - benefit from their expertise, get your project completed quickly and correctly, and reduce time-to-market for your product. Get in touch today to discuss bringing your project to life, or post your own project in Freelancer.com to hire an experienced Backend Developer.

На підставі 150,309 відгуків клієнтів, рейтинг Backend Developers становить 4.9 із 5 зірочок.
Найняти Backend Developers

Backend Development is a critical part of any website or software product. It starts with understanding the client's goals and developing solutions that achieve those goals in a cost-effective and scalable way. Backend developers are responsible for more than just code: they have to have a strong understanding of databases, frameworks, and development in general. A backend developer uses this knowledge to turn complicated customer requirements into a efficient, automated solutions that the user experience (UX) team can work with.

When it comes to Backend Development, experience matters - you want someone who's seen a variety of projects and knows the best technology to use for your specific scenario.

Here's some projects that our expert Backend Developer made real:

  • Developing connected systems between websites and local servers
  • Integrating software systems using modern real-time protocols
  • Building bespoke solutions tailored to customer requirements
  • Taking over existing projects and resolving tricky bugs
  • Developing custom solutions using tried and tested frameworks

Backend Development encompasses a wide variety of skills and technologies, so it helps to have an experienced developer on your team who can navigate the complexities of building high-quality solutions. Our expert developers have already undertaken a variety of different projects and can jump into yours with confidence - benefit from their expertise, get your project completed quickly and correctly, and reduce time-to-market for your product. Get in touch today to discuss bringing your project to life, or post your own project in Freelancer.com to hire an experienced Backend Developer.

На підставі 150,309 відгуків клієнтів, рейтинг Backend Developers становить 4.9 із 5 зірочок.
Найняти Backend Developers

Фільтрувати

Мої недавні пошуки
Фільтрувати по:
Бюджет
до
до
до
Тип
Навички
Мови
    Статус роботи
    119 знайдені роботи

    Saya ingin mengembangkan sebuah game petualangan bergaya multiplayer untuk platform mobile (Android / iOS). Konsep dasarnya adalah pemain bisa menjelajah dunia imaginatif, menyelesaikan misi bersama teman, dan saling berkompetisi lewat fitur co-op serta PvP ringan. Yang saya butuhkan: • Dokumen konsep inti meliputi alur cerita, mekanik utama, dan progres karakter. • Prototype fungsional yang sudah dapat dijalankan di perangkat mobile untuk menunjukkan eksplorasi, pergerakan karakter, serta sesi multiplayer dasar (lobby, host, join). • Rancangan antarmuka pengguna yang intuitif—cukup sketsa layar utama, menu inventori, dan tampilan misi. • Implementasi backend ringan menggunakan layanan real-time multiplayer populer (contoh: Photon, Firebase, atau solusi ser...

    $110 / hr Average bid
    $110 / hr Сер. заявка
    2 заявки

    We are building a sports and chatting app focused on online connecting users with workout partners (hiking, running, etc.). ** NON-NEGOTIABLE FIRST STEP (Please Read Before Applying) To ensure we are a match, we require a small, verifiable proof-of-concept before discussing budget or timeline. You will build a 100% offline Android demo app (no server/API needed) that implements: GPS location collection 2.Real-time route/trail drawing on a map Only candidates whose demo passes our background location stability test will receive the full detailed requirements. Demo must include source code, build instructions, and a short video demonstrating the background tracking working on locked-screen, background running and battery-saving modes of major Chinese Android devices (Huawei, Xiaomi, OPPO...

    $3868 Average bid
    $3868 Сер. заявка
    75 заявки

    I need an experienced Optimizely backend developer to help add new features to our platform. The key areas for enhancement are: User Authentication: Implement robust user authentication mechanisms to secure our platform. Content Management: Develop advanced content management features to streamline content creation and organization. Social Media Integration: Integrate with various social media platforms to enhance connectivity and content sharing. Ideal Skills and Experience: Proficient in Optimizely backend development. Strong experience in user authentication and content management systems. Familiarity with social media APIs and integration. Excellent problem-solving skills and attention to detail. If you have a track record of successfully adding features to similar platforms, I�...

    $21 / hr Average bid
    $21 / hr Сер. заявка
    87 заявки

    We are a growing software startup looking for an experienced Full Stack Developer to join our team for a long-term engagement. We're building modern web applications and are looking for someone who enjoys solving complex problems, writing clean code, and working across both frontend and backend systems. You'll be working closely with our engineering team to design, develop, and improve products that are used by real customers. For this role, we're looking for a developer with strong experience in C#/.NET and Python backend development, along with solid frontend skills using React or Angular. You should be comfortable taking ownership of features, contributing to technical decisions, and collaborating with other team members in a fast-paced environment. What We're Loo...

    $1069 Average bid
    $1069 Сер. заявка
    131 заявки
    Individual Investor Portal Development
    6 дні(-в) left
    Верифіковано

    I need a secure, intuitive web portal built specifically for individual investors. pages login Dashboard My Investments New Properties Wallet Withdraw Funds Withdrawal History Returns Transactions Documents KYC Verification Profile Settings Support Logout

    $186 Average bid
    $186 Сер. заявка
    31 заявки

    Je cherche un développeur spécialisé en backend, à l’aise avec Pine Script, pour créer un script TradingView visant l’automatisation complète de mes opérations de trading. Contexte Je dispose déjà de règles précises d’entrée et de sortie de position. J’ai besoin qu’elles soient intégrées dans Pine Script afin que TradingView déclenche automatiquement les ordres via webhooks. Ce que j’attends • Un code Pine Script clair, commenté et structuré. • Implémentation de mes conditions de trading : signaux d’achat/vente, gestion du risque, take-profit et stop-loss. • Paramètres ajustables (multip&eacut...

    $26 Average bid
    $26 Сер. заявка
    27 заявки

    Context Dastra is a SaaS platform helping organizations manage privacy, compliance, and governance workflows. Some customers need custom integrations between Dastra and their internal tools or third-party systems, using the Dastra API. We are looking for a freelance developer to help design, build, test, and document customer-specific integrations. Mission Objectives The freelancer will build reliable custom integrations that connect Dastra with customer systems such as CRMs, HR tools, ticketing platforms, document repositories, identity providers, data warehouses, or internal business applications. The goal is to automate data flows, reduce manual work, and ensure that customer-specific compliance processes can be operated directly from or alongside Dastra. Scope of Work The missio...

    $19 / hr Average bid
    $19 / hr Сер. заявка
    225 заявки
    Mobile Video Script Instalation and Localization
    6 дні(-в) left
    Верифіковано

    I have a short-form mobile video script already running in English. I’d like you to set it up so that everything—menus, captions, and any on-screen text—can be switched to Turkish directly from the admin page. Here’s what I need: • Configure the existing script on my server (PHP/Laravel) so it installs cleanly and pulls all language strings from a single translation file or database table. • Add a simple toggle or drop-down in the admin dashboard that lets me translate or edit each string, then save the Turkish version without touching code. • Make sure subtitles generated for uploaded clips can also default to Turkish when selected. • Test the front end on iOS and Android browsers to confirm the Turkish text displays correctly and right ...

    $31 Average bid
    $31 Сер. заявка
    96 заявки
    Multiplayer Card Game App Development
    6 дні(-в) left
    Верифіковано

    I need a complete cross-platform card game app that runs smoothly on both iOS and Android and lets players face off in real-time multiplayer matches. You will take the idea from blank screen to store-ready builds, handling everything from the game loop and UI to the networking that keeps every device in sync. I’m open on the specific engine or framework—Unity, Flutter, React Native, or another tool you prefer—as long as the end result feels native, loads fast, and can scale to many concurrent users. Alongside the mobile clients, I’ll need the lightweight back-end services required for real-time gameplay, player authentication, basic matchmaking, and an admin panel where I can tweak game parameters and monitor active sessions. Deliverables: • Fully functional ...

    $15 / hr Average bid
    $15 / hr Сер. заявка
    89 заявки

    We are looking for an experienced AI agent developer to help our California-based law firm build Claude-powered AI agents for internal legal workflows. Key responsibilities: Build AI agents using Claude / Anthropic API or similar large language model tools. Help automate legal document review, summarization, and information extraction. Create workflows for contract analysis, case document organization, and internal research assistance. Design a secure system that can work with sensitive legal documents. Build a simple user interface or integrate the agent into our existing tools. Set up retrieval-augmented generation, document search, prompt workflows, and agent memory where appropriate. Provide documentation so our small software team can maintain and improve the system later. Required...

    $492 Average bid
    $492 Сер. заявка
    272 заявки

    ⚠️ IMPORTANT: Only apply if you have built a real project using React, Supabase AND Mollie together. Not separately. If you have not used all three in the same project, please do not apply. --- **About us:** We run a subscription-based e-commerce business with a React frontend, Supabase backend, and Mollie as our payment provider. --- **Immediate task:** Audit our Supabase backend and subscription system — verify that all subscriptions are correctly saved, charged, and secure. Identify any issues and provide a clear written report. **Upcoming project:** Website rebranding within the next few weeks. We need someone who can build a professional, high-quality e-commerce frontend in React. --- **Requirements — all are mandatory:** ✅ Real hands-on experience with React, Supab...

    $147 Average bid
    $147 Сер. заявка
    227 заявки

    Seeking an experienced AI/Robotics Software Engineer to develop a Language-to-Task Flow Graph Generator for industrial robot operations. The platform will transform natural language instructions into validated JSON task schemas, NetworkX-based DAGs, and downloadable visualization artifacts. Expertise in FastAPI, Python 3.12+, Pydantic v2, NetworkX, PostgreSQL, Docker, and Clean Architecture is required. Experience with industrial automation workflows, task planning, validation engines, and scalable backend systems is highly preferred. Domain-Specific Robots Relevant to This Project 1. Warehouse & Logistics Robots – Autonomous mobile robots for picking, sorting, and conveyor operations. 2. Manufacturing Assembly Robots – Industrial robotic arms performing assembly, transf...

    $12 Average bid
    $12 Сер. заявка
    22 заявки
    AORBO treks
    6 дні(-в) left

    I need a skilled backend developer to build and deploy a secure user-authentication and management service written in Node.js and hosted on Google Cloud Platform. The project is green-field, so you’ll be setting up everything from the ground up: server environment, database connection, and the authentication flow itself. What I expect • A clean, well-structured Node.js codebase that exposes REST (or GraphQL, if you prefer) endpoints for sign-up, login, password reset, refresh tokens and role-based access. • Deployment to GCP using the service you judge best (Cloud Run, App Engine, GKE, etc.) with environment variables managed safely and logs viewable in Cloud Logging. • A small, automated CI/CD pipeline so updates go live with minimal downtime. • Clear, d...

    $257 Average bid
    $257 Сер. заявка
    118 заявки
    Part-Time JavaScript Dev for Ongoing Maintenance
    6 дні(-в) left
    Верифіковано

    Looking for a Part-Time JavaScript Developer — Ongoing Bug Fixes & Maintenance I am the founder of StructLearnPro () — a live structural design learning platform for civil engineering students in India. The app is built and live with paying users. I am not a developer myself. I need one reliable developer who can understand the existing codebase and handle ongoing bug fixes, small improvements, and maintenance. TECH STACK — WHAT YOU NEED TO KNOW • Frontend: Vanilla JavaScript, HTML, CSS — no frameworks • Backend: Supabase (PostgreSQL + Auth + REST API) • Hosting & Deployment: Vercel (serverless functions) • Payments: Razorpay (subscriptions + one-time orders) • Email: Resend API • No mobile app — web only The app has t...

    $6 / hr Average bid
    $6 / hr Сер. заявка
    89 заявки
    Abuse Reporting Web App
    6 дні(-в) left
    Верифіковано

    I need a responsive, browser-based application that allows anyone to report incidents of abuse quickly and safely. The entire flow must run on the web (no native iOS or Android code), so front-end and back-end should both be optimized for modern desktop and mobile browsers. Core functionality I must see at launch: • Anonymous reporting – no personal data is stored unless the reporter chooses to add it. • Evidence upload – users can attach photos or short video clips (formats: jpg, png, mp4, mov). • GPS location tagging – the user’s current coordinates are captured and saved with the report after explicit consent. For each submitted case, the system should generate a unique reference number, store the data in an encrypted database, and send a con...

    $154 Average bid
    $154 Сер. заявка
    120 заявки
    Project Source Code Buy
    6 дні(-в) left

    I’m acquiring private, production-tested GitLab repositories from the Fintech space to enrich our AI/LLM training corpus at Infobay AI. I will only consider codebases that have never been public, were actively used in a real-world environment, and show evidence of at least two contributors. A reliable test suite and a clean, repeatable build are mandatory. If your repository meets those standards, please outline: • The tech stack and framework versions • Proof it has never been public (e.g., creation logs, access history) • Confirmation of two-plus contributors • Instructions for running the test suite and reproducing a production build • Any existing documentation that shipped with the system Once I verify everything, we’ll arrange secure, ti...

    $1087 Average bid
    $1087 Сер. заявка
    26 заявки

    I'm looking for an experienced HR assistant or career specialist to handle daily searches and responses to Backend/Fullstack developer openings. Task: Massive daily responses to job openings, with resumes carefully tailored to each position. The goal - 100% receive 2-3 screening calls per day. What the job involves: daily monitoring of current openings on the specified platforms, selecting relevant positions based on specified criteria, tailoring resumes and cover letters to each specific opening, taking into account keywords and requirements, submitting responses on my behalf, maintaining a spreadsheet of submitted responses (date, company, link, status), and daily reporting. Candidate requirements: real experience in recruiting, career consulting, or job search assistance; understan...

    $37 Average bid
    $37 Сер. заявка
    9 заявки

    I need a complete inventory module built with Node.js on the back-end, Angular on the front-end, and MySQL as the data store. The overall project is a business management system, but for this phase I’m focusing solely on inventory management. Here is what has to work from day one: • Stock tracking – real-time quantity updates, low-stock alerts, and simple adjustment logs. • Barcode scanning – generate and read codes directly in the browser; a basic handheld scanner should work out of the box. • Order management – create purchase orders, receive items into stock, and tie outgoing orders to stock deductions. Clean, modular code is important because I’ll be adding CRM and accounting components later. API endpoints should be RESTful, the Angu...

    $3 / hr Average bid
    $3 / hr Сер. заявка
    58 заявки

    I want to launch a web-based marketplace that works much like Freelancer, but it will cater exclusively to two user groups: influencers and brands. The flow is straightforward—brands post campaigns or one-off collaborations, influencers browse and bid, and both parties communicate through a built-in messaging system until a deal is struck. Core features I need developed: • User profiles for both influencers and brands, each with tailored fields (audience size, niches, past collaborations for influencers; campaign details and budget ranges for brands). • A posting area where brands create projects and influencers can submit proposals or quotes. • A real-time messaging system tied to each project so negotiations stay organized. The build is web-only for now, so ple...

    $20 / hr Average bid
    $20 / hr Сер. заявка
    141 заявки

    I need an online marketplace similar to Loadshift, specifically for transportation services. The platform should enable users to book services, leave ratings and reviews, and allow carriers to quote on jobs. Key features include: - User registration and profiles - Service listing for transportation jobs - Booking system - Rating and review system - Carrier job quoting feature Ideal skills and experience: - Experience in developing service-based marketplaces - Strong backend and frontend development skills - Familiarity with booking and review systems - UI/UX design experience for user-friendly navigation

    $41 / hr Average bid
    $41 / hr Сер. заявка
    241 заявки

    I'm looking for an experienced Kbmax and Epicor CPQ expert to help build 53 models based on 3 samples provided by the Epicor team. The work involves parameter adjustments and custom UI design, aligning with our specific requirements. While I don't have detailed documentation, I can provide examples for guidance. Additionally, these models will require full integration with our cloud kinetic environment. Ideal candidates should have experience with Kbmax, Epicor CPQ, and system integration.

    $38 / hr Average bid
    $38 / hr Сер. заявка
    32 заявки
    Deploy React Sites To Hostinger
    5 дні(-в) left
    Верифіковано

    I will supply three separate React codebases from GitHub, each mapped to its own domain already registered inside my Hostinger account. What I need is a clean end-to-end deployment on Hostinger’s infrastructure so all three sites load live under their respective domains. Please keep every existing environment value, build flag, and configuration that you find in the repos—those settings are already proven in staging and must remain intact. Each project also connects to at least one database; I’ll provide the credentials once the hosting is ready. I’m not yet certain whether the back-end is MySQL, PostgreSQL, or another engine, so I’ll rely on your guidance when we verify the connection during setup. Deliverables • All three React apps compiled, hosted...

    $137 Average bid
    $137 Сер. заявка
    267 заявки

    I need a standalone chat module that plugs into my existing Worker Online platform so employers and workers can talk instantly without ever leaving the site. The core requirement is true real-time messaging—no page refreshes, no polling delays—so WebSocket technology such as , Pusher, Firebase Realtime DB, or a similarly reliable solution is essential. Key capabilities I must see in the finished module • One-to-one conversations that appear instantly on both sides • Secure file sharing inside the chat window (PDF, DOC, image and video attachments up to a configurable size limit) • Typing indicators, online/offline status and message timestamps • Scalable architecture that keeps messages synced across web and mobile views • Clean, responsive U...

    $469 Average bid
    $469 Сер. заявка
    261 заявки

    I want to build a clean, intuitive mobile app where users can browse and buy second-hand clothing—everything from laid-back tees to smart blazers. Because the catalogue will be a mix of both casual and formal pieces, the interface should let shoppers filter quickly by style, size, brand, price, and condition. The app needs to run natively on iOS and Android, sharing as much code as practical (React Native or Flutter are fine, but I’m open to your recommendation). I’m not in a rush; quality and maintainability matter more than speed, so we can agree on realistic milestones together. Core flow: • Seller uploads photos, adds basic details, and sets a price. • Listings appear in a scrollable feed with search and advanced filters. • Buyers add items to a c...

    $61 Average bid
    $61 Сер. заявка
    20 заявки

    I’m building out the backend for a new product-oriented platform and need a Django specialist to craft a clean, scalable REST API. The core stack is Django + Django REST Framework with JWT for stateless authentication, all backed by MySQL. Scope of work • Authentication: implement registration and login strictly via email + password, issuing JWT access and refresh tokens. • Resources: expose a Products model with full CRUD endpoints secured behind the JWT layer. • Code quality: follow DRF best practices, modular app structure, environment-based settings, and thorough error handling so the codebase is easy to extend for upcoming mobile clients. • Documentation: auto-generate endpoint docs (Swagger or Redoc) straight from the code so future teams can onboar...

    $37 / hr Average bid
    $37 / hr Сер. заявка
    202 заявки
    Full-Stack AI Developer for Analytics Dashboard
    5 дні(-в) left
    Верифіковано

    Need: Full-Stack Developer for AI Data Ingestion & Analytics Dashboard (Phase 1 MVP) Project Overview We are launching an adaptive AI intelligence platform designed to follow an individual’s professional journey. We are skipping static design mockups and building a functional, code-first Phase 1 MVP to present to institutional investors. The core objective of this MVP is to demonstrate a seamless, intelligent Live Data Transformation Flow: taking raw, messy user data and instantly turning it into a structured database asset that generates dynamic career analytics. Target Tech Stack (Open to Recommendations) Backend: Python (FastAPI / Django) or Node.js Database: PostgreSQL or MongoDB AI Integration: OpenAI API (utilizing Structured Outputs / JSON Mode) Frontend: React, Vue....

    $6919 Average bid
    $6919 Сер. заявка
    241 заявки

    I need an experienced Optimizely backend developer to help add new features to our platform. The key areas for enhancement are: User Authentication: Implement robust user authentication mechanisms to secure our platform. Content Management: Develop advanced content management features to streamline content creation and organization. Social Media Integration: Integrate with various social media platforms to enhance connectivity and content sharing. Ideal Skills and Experience: Proficient in Optimizely backend development. Strong experience in user authentication and content management systems. Familiarity with social media APIs and integration. Excellent problem-solving skills and attention to detail. If you have a track record of successfully adding features to similar platforms, I�...

    $35 / hr Average bid
    $35 / hr Сер. заявка
    129 заявки
    Gym Portal UI Development
    5 дні(-в) left
    Верифіковано

    I need a gym user interface portal that allows for user registration and login. The portal should accommodate three user roles: Regular Members, Trainers, and Administrators. Essential Features: - Regular Members should be able to: - Renew membership - View workout plans - Track progress Ideal Skills and Experience: - Proficiency in UI/UX design - Experience in developing role-based access systems - Strong backend development skills to support user data and progress tracking Looking for a developer who can create an intuitive, secure, and efficient portal. Please provide examples of similar work done.

    $1129 Average bid
    $1129 Сер. заявка
    64 заявки

    We are an e-commerce subscription business looking for a skilled, reliable, and long-term developer to join our team. **Our tech stack:** - React (frontend) - Supabase (backend) - Mollie (payment provider) **Requirements:** - Strong experience with React, Supabase, and Mollie - E-commerce experience, especially with subscription/recurring billing systems - All code must be saved on GitHub at all times — no exceptions - Available Monday to Sunday for urgent issues (response within 1-2 hours) - Good English communication skills - Comfortable with video calls for onboarding and project discussions - Must provide references or examples of similar projects **Immediate task:** Review our Supabase backend and subscription system — verify that all subscriptions are correctly saved, ...

    $190 Average bid
    $190 Сер. заявка
    324 заявки

    I want to launch a web-based marketplace that works much like Freelancer, but it will cater exclusively to two user groups: influencers and brands. The flow is straightforward—brands post campaigns or one-off collaborations, influencers browse and bid, and both parties communicate through a built-in messaging system until a deal is struck. Core features I need developed: • User profiles for both influencers and brands, each with tailored fields (audience size, niches, past collaborations for influencers; campaign details and budget ranges for brands). • A posting area where brands create projects and influencers can submit proposals or quotes. • A real-time messaging system tied to each project so negotiations stay organized. The build is web-only for now, so ple...

    $148 Average bid
    $148 Сер. заявка
    61 заявки
    AI-Powered Smart Rental Platform (Flutter + FastAPI + LLM)
    5 дні(-в) left
    Верифіковано

    AI-Powered Smart Rental Platform (Flutter + FastAPI + LLM) Project Description We are looking for an experienced Full Stack AI Developer to build an intelligent rental platform that combines mobile development, backend APIs, recommendation systems, and Large Language Models (LLMs). The goal is to create a modern housing application where users receive personalized property recommendations instead of browsing endless listings. Main Features • Flutter mobile application • Firebase Authentication & Firestore • Property listing and management • AI-powered property recommendation engine • Semantic search using natural language • LLM chatbot for rental assistance and property suggestions • Favorites and personalized recommendations • Admin dashboard AP...

    $574 Average bid
    $574 Сер. заявка
    155 заявки
    Monetizable OTT Platform Development
    5 дні(-в) left
    Верифіковано

    I’m ready to take my video catalogue to a full-scale OTT service and need someone who can carry the build all the way through to launch and revenue generation. The platform must stream smoothly on smartphones and tablets, work elegantly in any modern web browser, and have dedicated Smart TV support. A single, secure sign-in is essential—users only need to authenticate; individual sub-profiles are not required at this stage. Beyond the core playback experience, I’ll rely on you to: • architect a robust backend (CMS, transcoding pipeline, DRM, CDN integration, analytics) • craft polished front-end apps for mobile, web, and major TV operating systems • embed monetisation options—subscriptions, pay-per-view, ad insertion, or any blend that best fits...

    $10 / hr Average bid
    $10 / hr Сер. заявка
    61 заявки

    We are looking for a Full Stack Engineer to help us with a small improvement task in our existing SaaS project. We already have a working application built with React and Node.js. We now need a developer to fix a few backend issues and implement a small new feature in our API layer. Tasks include: Debug and fix a few Node.js backend issues Improve or refactor existing REST API endpoints Add one small new feature to the backend (we will explain after hiring) Ensure smooth integration with the existing React frontend Clean, maintainable code changes only (no redesign required) This is a small, focused task for an experienced developer who is comfortable jumping into an existing codebase.

    $141 Average bid
    $141 Сер. заявка
    299 заявки
    Android MDM Integration Specialist
    5 дні(-в) left
    Верифіковано

    I have an enterprise mobility project that hinges on solid Mobile Device Management for a fleet of Android tablets and phones. I need one person who can move comfortably between hands-on Android coding and backend systems integration. On the Android side, you will work with Device Owner APIs, Android Enterprise, and the latest SDK features to create (or extend) an agent that handles enrollment, remote configuration, policy enforcement, and secure app distribution. Custom UI work is minimal; the focus is on reliable background services, zero-touch enrollment, kiosk mode, remote wipe, and compliance checks. On the integration side, you will stitch this agent into our existing infrastructure through RESTful APIs and webhooks. That includes authenticating against our identity provider, pushi...

    $265 Average bid
    $265 Сер. заявка
    100 заявки

    Hi, I am from Nagpur and I am looking for a developer who can work on our website []. The website design/frontend is already available. We need to complete the E-Commerce functionality such as: * Customer Login & Registration * Payment Gateway Integration * Shiprocket Integration * Order Management * Order Tracking * Admin Dashboard * WhatsApp Order System (for Nagpur) Before discussing further, please let me know: 1. Are you from Nagpur or nearby? 2. Have you worked on E-Commerce websites before? 3. Can you review our existing website and suggest the best approach? 4. What would be the approximate cost and timeline? Thank you.

    $96 Average bid
    $96 Сер. заявка
    100 заявки
    Backend-Controlled Crypto Trading Platform
    5 дні(-в) left
    Верифіковано

    I need a web-based trading platform that I can fully manage from an admin console. After a quick email-and-password signup, each user should automatically receive both a profile and a unique, custodial wallet address. At launch the platform will handle Bitcoin and Ethereum; the codebase must be structured so I can add further coins later without a full rewrite. Key functions I must have as the administrator: • Real-time dashboard showing every registered account, current balances, recent deposits, and withdrawal requests. • Ability to push crypto from a master wallet into any user wallet on demand. • Withdrawal workflow that blocks release of funds until the user pays a configurable fee I set in the backend. User-side essentials: • Responsive trading interface for...

    $384 Average bid
    $384 Сер. заявка
    77 заявки

    A web-based wallet management system for B2B operations with a two-bucket balance model. The system should track and manage prepaid customer credits split into two categories: a Minimum Monthly Commitment (MMC) bucket and an Advance bucket, with defined consumption priority rules, done using python. Core Features Required: Customer wallet creation and management Two-bucket balance model (MMC + Advance) with MMC consumed first Transaction logging (credits, debits, adjustments) Wallet top-up and balance deduction flows Dashboard showing wallet balances per customer Basic reporting (transaction history, low balance alerts)

    $94 Average bid
    $94 Сер. заявка
    39 заявки

    I’m in the middle of a Python-based web development project and need an extra set of expert hands to move things forward. The core of the work is straight-up Python coding: wiring up new views, tightening backend logic, and making sure everything runs smoothly in the browser. Here’s the situation: the existing project is already laid out, but a few key features still need to be built, refactored, or debugged. I’d like you to dive into the current repository, review the structure, then implement or improve modules as we agree. Whether you prefer Django, Flask, or another lightweight framework is fine—as long as the solution is clean, well-documented, and production-ready. Deliverables • Updated Python source that drops straight into the repo without breaking...

    $6 / hr Average bid
    $6 / hr Сер. заявка
    42 заявки
    Continue SaaS ERP Development
    4 дні(-в) left
    Верифіковано

    I am already more than halfway through building a multi-tenant ERP platform offered as SaaS. The current stack is React on the front-end with a Node.js (Express) API, and subscription payments are flowing through an integrated payment-gateway module. What’s left is to finish the remaining business-logic layers, tighten up the UI, and prepare the whole product for production release. I’ll give you access to the existing Git repository, detailed module road-maps, and the payment gateway keys already in place. Your job is to pick up the codebase, complete the unfinished modules, squash any bugs you find, and push clean, well-commented commits back to the repo. Key expectations: • Keep everything in React + Node.js, following the existing component and controller patte...

    $489 Average bid
    $489 Сер. заявка
    252 заявки

    I need a full-featured, web-based employee management system that my HR team can open in any modern browser. The application must include three core modules: attendance tracking that records clock-ins/outs in real time, payroll management that calculates salaries, deductions and exports payslips, and a performance review section where managers can log goals and appraisal notes. Access to the system should be protected with straightforward email/password authentication; a simple registration screen for admins and a secure login page for staff are all that’s required right now. Please build the back-end and front-end, wire them together, seed it with sample data and give me clear instructions on how to deploy it to our own server. I’ll consider the project complete once I can: ...

    $3 / hr Average bid
    $3 / hr Сер. заявка
    65 заявки
    Pickleball League Backend with Node.js
    4 дні(-в) left
    Верифіковано

    I’m building a full-featured website for our new pickleball league and need an experienced backend developer to bring the real-time pieces to life. The stack is already chosen: Node.js (Express or NestJS) with PostgreSQL as the primary database. Core tasks • Live player auctions – real-time bidding, instant bid notifications, and a full auction history log powered by Socket.IO. • Live match scoring – endpoints that push each team’s score and stats seconds after every rally so the front-end can update instantly. • Secure auth – JWT sessions plus OTP or token-based magic-link login for captains, admins, and bidders. • Media handling – upload player photos and team assets straight to AWS S3 (or Cloudinary if you prefer) and stor...

    $87 Average bid
    $87 Сер. заявка
    45 заявки

    I need a polished, DAT-style platform that lets freight brokers, manufacturers and carriers quickly locate one . The first gate is classic Email-and-Password authentication; once inside, users should land in an interface that feels familiar to anyone who has worked with DAT—clean load boards, clear typography and data-dense tables optimised for desktop and mobile. Core workflow centres on an advanced, filter-rich search and match engine. A broker might filter by trailer type, lane, capacity date or equipment specs and receive instant, ranked matches. Likewise, a carrier can zero in on loads that fit dead-head radius, weight limits and preferred rates. The experience must be lightning fast and return precise results—even as the database grows. At launch I only need the search-...

    $83 Average bid
    $83 Сер. заявка
    73 заявки

    FellahDZ is a comprehensive digital marketplace and logistics solution tailored for the Algerian agricultural sector. The platform solves a major supply chain challenge by seamlessly connecting farmers and agricultural producers with certified local and regional transporters. Key Features & Architecture: - Dynamic Marketplace: Allows farmers to list products and transportation needs, while enabling transporters to offer their services and optimize their routes. - Robust Backend: Built with Supabase for real-time data management, secure user authentication, and scalable relational database architecture. - Frontend & UI: Developed a highly responsive, modern multi-lingual user interface (including French) deployed seamlessly on Vercel for optimal performance. - Optimization: Focused...

    $199 Average bid
    $199 Сер. заявка
    109 заявки

    I’m creating “Jaya jaya,” a social-networking mobile app. For this first release I need a developer who can take the idea from blank screen to a working build that lets people sign up, create rich user profiles (photo, bio, interests, basic privacy settings), and browse other members’ profiles smoothly. Core scope • Design and implement onboarding, authentication, and profile-creation flows. • Store profile data securely in a scalable back end (Firebase, Supabase, or a stack you recommend). • Deliver clean, well-documented code in React Native or Flutter so the app runs on both iOS and Android. • Provide clear instructions for building and deploying the app. Nice-to-have (not required for this milestone but keep the architecture ready):...

    $38 / hr Average bid
    $38 / hr Сер. заявка
    145 заявки

    I’m launching a web-based social network aimed at helping friends and family stay connected, and I need the full site designed, built, and made ready for production. The platform must go beyond a simple prototype—every feature has to be stable, secure, and efficient so we can scale quickly once users start signing up. Below are the non-negotiable deliverables for the first release: • User profiles with photos, bios, privacy controls and activity timelines • Real-time messaging (one-to-one and group) with notifications • Algorithmic news feed where users can post, react, comment and share • Live streaming so members can broadcast instantly from any device • Marketplace module for peer-to-peer listings, offers, and in-app payments On top of t...

    $623 Average bid
    $623 Сер. заявка
    132 заявки

    I already host an open-source platform in a SaaS environment and now need it tailored so it follows my product vision more closely. The codebase itself is solid; the next step is to adjust it and bolt on the right integrations so the service feels seamless to end-users. Core focus • Map my business logic to the existing code, refactoring only where absolutely necessary so future upgrades remain straightforward. • Build out secure, well-documented connections to the external services I specify (think payment, CRM, email or other APIs—I’ll confirm the exact stack with you once we start). • Keep the UI intact for now; this phase is all about reliable third-party integrations and the back-end hooks that make them work. Process I have in mind 1. Review the c...

    $3782 Average bid
    $3782 Сер. заявка
    267 заявки

    I’m building a lightweight Android app to keep daily ground-booking records tidy and every rupee traceable. For this first phase I only need the core account system in place so the rest of the product can grow on solid ground. The flow is simple: new users create an account with an email-and-password pair, supplying just a username and their email address. Once inside, they land in the standard user area. An Administrator account gets its own dashboard where I can view bookings, update them, and monitor incoming payments; no charts or calendars yet, just clear tables I can edit. A separate Moderator role also has to exist now so I can later delegate basic oversight tasks without full admin privileges. Security matters, so apply current best practices—hashed passwords, secure ...

    $22 / hr Average bid
    $22 / hr Сер. заявка
    155 заявки

    I’m updating my portfolio site for InventoryGPT and need a fresh hero section that feels truly minimalistic while instantly telling visitors what we do: use AI to predict demand and optimize stock levels. The copy is ready, so your focus is on layout, typography, spacing, and a single standout call-to-action button. A subtle illustration or abstract graphic is welcome if it stays light and uncluttered, but the design must keep plenty of white space and direct attention straight to the headline and CTA. Deliverables • Figma (or comparable) source file with well-named layers • Desktop and mobile versions • Export-ready SVG/PNG assets for any custom graphics • Quick hand-off notes covering fonts, colours, and spacing Acceptance criteria 1. Hero sho...

    $542 Average bid
    $542 Сер. заявка
    66 заявки

    Key Components of the Diagram UI (User Interface): This represents the frontend of the application or website. It is the visual layer where users interact, click buttons, or input data. App (Application/Server Logic): This is the backend or middleware. When a user takes an action on the UI, the request is sent to this component to process the business logic. DB (Database): This represents the data storage layer. It safely stores user credentials, profiles, and all other application data. The 'App' layer communicates with it to fetch or save information. Flow Lines (Arrows): The arrows connecting these boxes illustrate the direction of the Data Flow (e.g., UI ➔ App ➔ DB) and how different parts of the system communicate with each other. System Description This diagram illustrates ...

    $5 / hr Average bid
    $5 / hr Сер. заявка
    23 заявки
    iOS & Android Utility App
    3 дні(-в) left

    I need a single code-base solution that ships to both the App Store and Google Play. The project is a utility-style application, not e-commerce or social media, so the focus is on streamlined functionality rather than heavy UI flourishes. Core requirements • Secure user authentication that keeps credentials safe and allows account recovery. • Real-time push notifications delivered instantly, even when the app is in the background. • Reliable data synchronisation so a user can pick up on one device exactly where they left off on another. I’m open to React Native, Flutter, or any other modern cross-platform stack as long as it achieves native-level performance. Clean, well-commented code and a short hand-off session at the end are important to me so I can maintai...

    $47 Average bid
    $47 Сер. заявка
    36 заявки

    Рекомендовані для вас статті