Simple solar cell panel projectsроботи

Soy un emprendedor, ingeniero electricista recién egresado buscando crear una imagen para lo que proyecta ser una empresa que brinde servicios de soluciones energéticas y ingeniería eléctrica en general. Quiero que la imagen sea moderna, contemporánea y que lleve implícita en ella la motivación que tenemos como empresa para poner nuestra huella en el cambio energético para la region en la que estaremos ubicados.. Esto es un proyecto que surge de Scratch, es decir no contamos con alguna idea, mas que el nombre y algunas ideas de logo, Quiero plasmar la versatilidad de el trabajo digital que se tiene hoy en día creando una imagen amigable, con la juventud y el mundo digital. Por lo mismo que se busca un diseño sencillo, ...

...have access to do it. - External API Integration: The website should be integrated with: - Crypto payment gateways for seamless and secure transactions. - Email notification services for communicating with participants. - Real-time chat for maintaining engagement and providing support. - Metamask integration, although users should have the option to buy tickets without logging in. Admin Panel: - Should have access to make new lottery , modify lottery details (commissions, rewards, lottery time, how lottery will finish, payment address, which payment network) - Logs (payment success fail, hack tries) - See Lottary Pools and Modify results, - See Payments and Delete / Modify results Ideal skills and experience for this project include: - Proficiency in web develo...

Looking for a graphics person to modernize and polish an existing icon image, just a touch up should be straight forward. Budget is $10, start your bid with "touchup"

APP - ANDROID, web para conductores/pasajeros/panel administrativo TE TRANSPORTO – TU TRANSPORTE SEGURO Y EFICAZ CHOFER 1. Perfil Completo: Cada conductor proporcionará detalles completos incluyendo fotos del vehículo, licencia de conducir, características del vehículo (adecuado para familias, negocios, etc.), y servicios adicionales (Wi-Fi, aire acondicionado, cargadores de dispositivos). También incluirán sus tarifas. 2. Ofertas y Disponibilidad: Los conductores indicarán sus tarifas y disponibilidad horaria. Cada conductor aceptará una sola carrera a la vez para garantizar la dedicación y calidad del servicio. 3. Seguridad y Calificaciones: Implementación de un sistema de verificación de identidad...

...what we consider when we assign star ratings: 1. Name of the logo must be found in the logo and it should be easily readable: From The Inside Out Wellness Center 2. MUST include dragonfly into the design - example use the wings for the W (wellness)....be creative. 2b. MUST include the flower of life. 3. Colors: Use the colors of the Chakras - Red (Root Chakra), Orange (Sacral Chakra), Yellow (Solar Plexus Chakra), Green (Heart Chakra), Blue (Throat Chakra), Indigo (Third Eye Chakra), Violet or White (Crown Chakra). You can also incorporate golds and silvers, but ensure that all Chakra colors are represented. 4. Can use any type of medium. 5. Shape: Square shape logo 6. Design should be original and not infringe on any copyrights. 7. Final deliverables should include Adobe file...

...in my spreadsheet: Total Costs for the Job (Cell V14): $241,779.50 Total Collected (Cell V17): $289,844.00 Profit (Cell V15): Calculated as =V17 - V14, resulting in $48,064.50 I need to calculate the profit as a percentage of the total costs, and this should be displayed in cell V16. The formula I am using is: = ( ? 15 / ? 14 ) ∗ 100 =(V15/V14)∗100 Given the values: = ( 48 , 064.50 / 241 , 779.50 ) ∗ 100 = 19.88 % =(48,064.50/241,779.50)∗100=19.88% However, instead of getting 19.88%, the result I am seeing is 1987.95%. This suggests there might be an error with the data, cell formatting, or an unnoticed issue in the spreadsheet. Specific Tasks: Review the Spreadsheet: Analyze the provided Excel file to ensure all values...

I am seeking a skilled and experienced freelancer to assist me in developing a comprehensive projects portfolio that highlights my expertise in Lean Six Sigma, Inventory Management, Kaizen, and Continuous Improvement. Key Elements: - I will need you to include detailed project descriptions and project images in the portfolio. - The key projects that will be included in the portfolio will be related to Inventory Management and Optimization. Specifically, the project will focus on demonstrating my use of strategies to achieve results that are reflected in Key Performance Indicators (KPI's). Ideal Candidate: - Experienced in Lean Six Sigma, Inventory Management, Kaizen, and Continuous Improvement. - Proficient in creating engaging and visually appealing project portfolio....

Complete Taxi App with Driver and Customer with Admin Panel

I am in need of a mid-level salesperson to spearhead acquisitions of mineral and surface leasehold rights for Oil, Gas, and Solar energy. Responsibilities: - You will be tasked with calling through a provided list to negotiate purchases. - Your role focuses predominantly on territories I've identified, details of which will be shared upon engagement. Ideal Skills and Experience: - Your sales experience should ideally align with the energy sector, specifically in Oil, Gas, or Solar. - Proven track record in rights acquisition would be an advantage. - Excellent negotiation and communication abilities are essential. Your task is pivotal to the successful expansion of our energy portfolio. I look forward to discovering how your skills and expertise can drive this forwa...

Hello, A Shopify style SaaS E-commerce site builder will be installed for a new project of an official and licensed payment institution operating in Turkey. - The goal is not to build an e-commerce site, but to build a SaaS Platform like Shopify that enables users to build e-commerce sites. - A superadmin panel will be created using Coolify or a similar solution. - A sign up and login page will be created, from this page users will sign up, pay the prices we have set through Superadmin (Stripe integration) and buy packages. Then they will type their domain and they will be presented with the required CNAME/A Registration values. When he/she makes his/her redirections, the Medusa admin will be opened, and the user will be able to set up the e-commerce site in this way. - We wil...

I need a clean, professional Wordpress website created for my brand. It must be simplistic, user-friendly, and designed to cater to B2B customers. The primary purpose of this website is to ser...simplistic, easy to use layout that still looks professional - A design that specifically caters to B2B customers - The ability to display a variety of products without overwhelming visitors - A responsive design that looks good on all devices - SEO-friendly structure and content Ideal Skills: - Proficiency in Wordpress and its themes - Experience in creating B2B websites - Design ability: keeping it simple, yet professional - Knowledge of SEO best practices to implement on the website. Please provide examples of your previous work, especially if you have experience with creating similar...

I am looking for a developer who could develop a iOS IPhone app. It should do following Use a authentifcation based on a MySQL database table (for login) store that login as session that I not need each time again login. Create a connection between that MySQL and grab data and display that on app. Store that data like on cache that I can see that data also offline. I only will answer to developer who native language are English or German and who could show some iOS work.

... * Progress (percentage) * Priority * Action plan * Comments - The calendar section should list team schedule. * Team working schedule "in office / out of office" * Team calendar "working remotely, annual leave, business trip, public holiday, overtime" Excel Automation: - I need the Excel sheet to have automated functions: * Conditional formatting for visual tracking: Changes in cell color or font based on the progress percentage, to quickly see if a project is on target. * Data validation for entry consistency: Ensuring that data is entered correctly, preventing errors. *Eligible to insert in google sheets with same formatting The ideal freelancer for this project should have: - Proficiency in Excel formulas and functions for tracking proj...

Admin Panel Redemption Coupons Balance Registration Wallet (Balance) Inside the administrative panel: Add Balance, observation field when adding balance, internal record of previous balance, and new balance after addition, and login of who altered the balance. Bonus System (Missions Module converted to Bonus) Add Individual Rollover for this specific bonus. Maintain the option by provider or specific game. Released Bonus Report with Observations. In the Player's Internal Registration, there is an option to activate the bonus for them and check the progress of the rollover completion. Player Internal Registration When registering the player, add wallet directly when creating the new user via admin (currently, the wallet is only created if created via the main site). Ad...

1. Hybrid mobile app to be available in Apple Store and Google 2. Ability to choose location and have a trip preview and start trip 3. Four buttons must be available for both trip preview and start trip, like at the bottom or a flyout panel 4. Button 1 (turn on Weather), Button 2 (turn on Gas stations), Button 3 (turn on rest areas), Button 4 (turn on accommodations) 5. Must plan for user account creation and login (with option for social signin)

Looking for someone to develop a simple mobile app that will work on both iOS and android. That would mean utilizing one of those frameworks such as React Native or Cordova (or something else similar). The app will basically just allow the user to search for an order (done through a Rest API) and then select photos on the device and upload those to the selected order (also though a Rest API). Detailed Requirements: Setup screen where system URL and API key can be entered and then saved so subsequent uses of app doesn't require it to be reentered Ability to search and find order using order number, customer name, or company name Ability to select multiple photos and upload at once (although API call needs to be made for each file) Ability to take picture with camera right i...

I'm looking for an Android developer to create a simple news app for me. The key feature that I'd like to prioritize is an offline reading capability, which is essential for my users who may not have constant internet access. The news articles should be displayed in a list of headlines. This layout will allow users to quickly scan through the news and pick out articles of interest. The ideal candidate for this project would be a developer with experience in Android app development, particularly in working with APIs. Experience in designing user-friendly and intuitive interfaces would also be a plus.

i have script .js i want convert it to powershell .ps1

...talented Android developer to build a secure and feature-rich mobile application along with a Laravel-based admin panel for remote management. Responsibilities: Develop an Android application (minimum Android 8) with the following functionalities: Read incoming SMS and identify target keywords. Send identified keywords to a designated remote server. Receive and display SMS messages triggered from the admin panel. Implement a sync button to synchronize SMS data and send details to the remote server. Design and develop a secure admin panel using Laravel 10, MySQL 8, and PHP 8: User registration and management. Device registration with approval workflow. Device blocking functionality. SMS panel to send SMS commands to registered devices. Ability to set the rem...

...FREELANCERS ACCEPTED I am looking for a skilled developer to design a hybrid travel booking mobile application, complete with a web-based admin panel using modern technologies. The core feature of the app is travel package booking. Technology will be NodeJs/Flutter/React Native/Firebase ONLY Key Features: - Travel Package Booking aimed at solo travelers and families. - Search feature to search for destination - Provide detailed information about the package (including directions) - Wallet system for cash management (only to manage refunds) - accounting history - Vendor payment - Booking/cancellation/notifications/feedback The admin panel should include: - User management - Data uploading for treks - Payment management - app configurations I have more details to s...

...etc. y alguna opcion para ponerles nota, opinar, añadir a tu lista/coleccion del usuario logeado, etc.), coleccion (aqui podras ver las colecciones/listas de los usuarios de la pagina y todas las opiniones/notas que hayan puesto en los videojuegos, opcion de exportar esa coleccion a archivo .xls), contacto (formulario de contacto que te llega a un correo gmail). El usuario administrador tendrá un panel de administracion donde puede añadir, editar o eliminar cualquier videojuego o usuario de la web, añadir noticias al inicio, etc....

I need an experienced electrical designer with expertise in AutoCAD for an industrial project. The design needs to incorporate power distribution and include layouts for Solar and Wind OFC, WMS and CCTV. Ideal skills and experience: - Proficient in AutoCAD Electrical software - Previous experience with industrial projects - Deep understanding of power distribution - Capable of designing Solar and Wind OFC layouts, WMS and CCTV system Compliance: The design work must adhere to the following industry standards and regulations: - National Electrical Code (NEC) - International Electrotechnical Commission (IEC) Please, include actual experience and project samples that adhere to these standards in your bid.

As I'm looking to establish a new SMM panel, I need a skilled developer who can integrate key features into the script. Here's an overview of what the project entails: - **Core Features**: Implement a User Management System, API Integration and Payment Gateway Integration. Given the sensitivity of the data involved, it's crucial that these features are robust, secure and user-friendly. Build a cross-functional SMM panel that generates and sells traffic for all social media platforms. - **Security**: Incorporate Two-Factor Authentication and an IP Whitelisting system. Additionally, the script should have an extensive Activity Log Monitoring mechanism. - **Performance**: Develop a script that prioritizes speed and responsiveness. This includes a Fast Loading Se...

Будь ласка, зареєструйтесь або увійдіть в систему для перегляду деталей.

I need a Ready Made website and admin panel developed for my Matka project. The website will be a key platform for my users to check and keep track of matka results, and the admin panel will be used to manage user accounts and track betting transactions. Key Features for Website: - Regular and live updates of matka results - Sorting and filtering options for user convenience - Display of historical data to aid users in making informed decisions Key Features for Admin Panel: - User registration and login management - Password reset functionality for users - User profile management Ideal Skills: - Proficiency in website development and design - Experience with admin panel development - Knowledge about data handling and security - Understanding of user experienc...

Specs: Grid Cells select format 1-the color picker: first time open (no previous coclor selected), defaulted luminance to 50%. If previous color selected, default to that color. 2-the selected color needs to be on the button a...select format 1-the color picker: first time open (no previous coclor selected), defaulted luminance to 50%. If previous color selected, default to that color. 2-the selected color needs to be on the button after first selected. 3-a radio button (format button appearance) for each format type: backcolor, forecolor, bold, italic, underline. same like color, needs to select and change the cell. 4-the cell select needs to toggle the format on and off. 5-checkbox to save the format between reload of grid data source. Bid with 1-22-333 in you ...

I urgently need an expert to find Gportals Private API to create plugins for the Console Rust game. The main goal is to develop a custom administration panel, automate server management tasks, and enable integration with other applications. Despite skipping the specific functionalities for the plugins, flexibility and versatility should be core in their design. The completion of this project is time-sensitive, thus immediate engagement is appreciated. Skills and Experience: - Experience with Gportals Private API - Proficiency in console game plugin development - Knowledge of server management automation - Demonstrable successful projects in similar tasks.

I am looking for a programmer with previous experience in building a Group Buy SEO Panel with the following tools, with the possibility of adding tools later. semrush freepik envato elements Motion Array pacdora with the following download limits: freepik 25 files /day envato elements 30/day Motion Array 30 /day pacdora 30/day I do not want a page specifically for payments, but in return I want a section at admin dashboard to generate activation keys for each service. I will sell these keys, and once the customer obtains an activation key for a service, he will paste it in a specific place on user dashboard and click on the word Activate, and the service associated with this key will be activated. Please send a previous project you work on

I am looking for a skilled developer to design a hybrid travel booking mobile application, complete with a web-based admin panel using modern technologies. The core feature of the app is travel package booking. Technology will be NodeJs/Flutter/React Native/Firebase ONLY Key Features: - Travel Package Booking aimed at solo travelers and families. - Search feature to search for destination - Provide detailed information about the package (including directions) - Wallet system for cash management (only to manage refunds) - accounting history - Vendor payment - Booking/cancellation/notifications/feedback The admin panel should include: - User management - Data uploading for treks - Payment management - app configurations I have more details to share with the chosen deve...

I'm in ...to facilitate server management. Here's a bit more detail on the tasks: - Setup Webmin: The primary task here is installing and configuring Webmin. It should be set up properly and securely to ensure that the server can be effectively managed through the panel. - Additional Server Tasks: Other tasks might include firewall configuration and VPS setup. These tasks are important to ensure the server is secure and running properly. Ideal candidates for this role should have: - Proficiency in Ubuntu server setup - Experience with server panel software, specifically Webmin - Strong understanding of server security - Capability to manage additional server tasks like firewall configuration and DNS setup Please share your relevant experience, and feel free to as...

I need a proficient PHP developer to address an integration issue I'm experiencing with the Ccavenue payment gateway on my website. Key Tasks: - Resolve the integration issue occurring at a specific stage ...I'm experiencing with the Ccavenue payment gateway on my website. Key Tasks: - Resolve the integration issue occurring at a specific stage of the payment process. - Implement the necessary changes to ensure the payment gateway functions seamlessly. - Integrate a new control panel in the admin panel. Ideal Skills and Experience: - Strong command of PHP, particularly in relation to payment gateway integration. - Previous experience with Ccavenue payment gateway is highly preferred. - Proficiency in admin panel development. - Ability to troubleshoo...

I'm in need of many skilled freelancers based in Udupi, who can assist me with various projects. The main goal is to support me in various projects and build a strong company. Key Requirements: - Skilled in particular areas like web-development, Flutter, content creation, UI/UX etc. - Able to work out of home or co-working space - Able to provide long term commitment to projects I am building a panel of freelancers in Udupi to work out of my co-working space, who can support me in client projects as well as my own projects. I would also like to build a set of talent pool out of Udupi to cater to the local as well as global audience.

More details: Which specific UI change would you like to make to the app? Change color scheme What is the primary color you want for the app's color scheme? Blue Do you require any additional features to be added to the app? add logo

I have 11 simple digital imags that I need converted to an .STL file so I can have it 3D printed. The design contains basic geometric shapes and lacks complex curves or textures. Key Requirements: - Convert a simple digital image into an .STL file for 3D printing - Ensure the file is optimized for 3D printing to avoid any issues during the printing process. Ideal Skills and Experience: - Proficiency in CAD software - Experience in 3D modeling, particularly converting images into .STL files - Understanding of 3D printing requirements and how to optimize files for this purpose.

Objective of the pr...generates high-quality content related to beauty, cosmetics, skin and hair products, and makeup. This system must: Collect content from various sources (URL, RSS, XML) configurable by a Super User. Filter and process such content using artificial intelligence (AI) to improve it. Automatically publish enhanced content to a WordPress blog and various social networks. Provide an intuitive administration panel for managing system sources and configurations. Technologies and Tools Used Backend: Django Frontend: React Database: MySQL or PostgreSQL Monitoring: Prometheus and Grafana Containers and Orchestration: Docker and Kubernetes This project is already validated by AI tools to correct errors in the part described in the technical document, so the development is...

My current website needs updating. It's an electrical, solar, battery, and EV charger business site, and I'm looking for an experienced web developer to update the site using Bluehost and WordPress. The job will involve the following: - Updating Content & Photos: The site's content and images need to be refreshed to reflect my business's current offerings. - Redesigning Layout: I want the website to have a fresh, modern look that aligns with the services I provide. - Adding New Features: I'm open to suggestions here. A few ideas could be online appointment booking system, product catalog, or live chat support. Additionally, there are a few key areas where I'm seeking recommendations: - SEO Enhancements: The site should be optimized for search eng...

I'm looking for a skilled UX/UI designer with experience in creating designs for websites, mobile sites, Android & iOS apps, and admin panels. The main objective of this project is to design interfaces for a car dealers service. **Key Aspects of the Project:** ...Features:** The design should include features for vehicle inventory management, online booking for service appointments, and test drive scheduling. Ideal candidates for this project should have: - Proven experience in designing UX/UI for multi-platforms, particularly for e-commerce-like services. - Strong understanding of car dealership services or similar areas. - Proficiency in developing admin panel interfaces. If you believe you have the right skills and experience for this project, I look forward to se...

We are seeking an experienced freelancer to set up a Node.js application on our web hosting service, ensuring it runs correctly and is accessible via a custom domain. Hosting Environment: - Web hosting service: - Custom domain: - Node.js Manager is accessible through the hosting control panel. Task Requirements: - Configure the hosting environment to run a Node.js application. - Upload and set up a simple Node.js script that responds with a fixed message for any route. - Ensure the application is running and accessible via the specified domain. - Verify and configure the necessary firewall and port settings to allow traffic on the required port (default 3000). - Provide documentation of the steps taken and any configurations made. Specifics: The script should

I am on the lookout for a motivated and knowledgeable salesperson who can help push our solar panels into the residential and commercial market spaces. Key Responsibilities: - Selling solar panels to both home and business owners. - Showcase these products in a physical storefront. The Ideal Candidate: - Experience in selling solar panels. - Has an understanding of Monocrystalline, Polycrystalline, and Thin-Film panels, even though we don't have a specific type of solar panel to sell yet; being able to explain the difference to potential buyers is crucial. - Proven track record of sales results in the energy sector. - Extremely personable and able to build relationships with all types of customers. Are you ready to help others make a switch to r...

...understanding of energy management concepts. Requirements: Static Graphics: - Solar Panels - Electric Vehicles - Electric Vehicle Charging Stations - Energy Grid - Home Appliances: - Fridge - Kettle - TV - Toaster - Coffee Machine - Oven - Microwave - Dishwasher - Washing Machine - Clothes Dryer - Iron - Vacuum Cleaner - Air Conditioner - Geyser/Water Heater - Pool Pump - Smart Plug - Smart Thermostat - Bar Meters to show usage - Usage Dials - Usage Meters Animated Diagrams: - Electric Vehicle Chargers - Solar Panels - Energy Utilities/Power Lines/Power Grids - House with Rooms - Electricity Lightning Bolt - Smart Car Animated Ant Tracks showing movement between the house, grid, solar panels, and electric car Technical Speci...

I'm looking for drafters experienced in both civil and telecommunications projects to join my team. You will need to be proficient in AutoCAD and Civil 3D, as these are the primary software we use. Key requirements include: - Proficiency in both Civil and Telecommunications drafting - Extensive experience using AutoCAD and Civil 3D This is an ongoing project with varying deadlines, so being able to manage your time efficiently is a must. Please highlight your experience in both fields and your software proficiency in your proposal.

I need a graphic designer to create a simple and minimalist logo that will emphasize brand recognition. The logo will be used across various platforms including on my website, print materials, and social media. Key deliverables for the project include: - A simple, minimalist logo design that focuses on brand recognition - The logo should be versatile and suitable for use across a range of platforms, including websites, print materials, and social media Ideal skills and experience for this job: - Proven experience in graphic design, particularly in creating logos that focus on brand recognition - Proficiency in minimalist design styles - Understanding of how to create logos that are versatile for use across multiple platforms - Strong communication skills to understand and ...

Develop schematics, PCB and firmware for a compact NFC reader. The suggested RFID controller is PN7160. Microcontroller - STM32 0) Two boards - antenna and the main board. The antenna diameter is 15mm with a hole in the center 4-5mm. The main board is 14mm in width and length is 35mm or less. 1) The reader must read and write password-protected memory blocks in Mifare Classic cards. 2) The reader keeps the password for the RFID cards as a hard-coded constant. 3) The reader has an 4-byte reader ID stored in its EEPROM memory. 4) The RGB LED on the edge of the main board, whose location matches the hole in the antenna. RGB LEDs are connected to the PWM pins of the controller. 5) A waterproof (if possible) speaker must be on the opposite edge of the main board, closer to one side to leave sp...

I'm in need of a fast professional who can develop a website for me similar to the one linked, and then provide me with the necessary files so I can host it myself. Should be simple website, no wordpress or similar. I will provide you with further details later I will provide you graphics but you would also need some grapic skills to make them look cool. Key Requirements: - Create a website similar to - Provide the files for hosting upon completion - Eye for aesthetics and design Please let me know your expected time frame for completing such a task, and your prior experience in creating similar websites.

...Enhance the usability and overall experience of my web application - Ensure the design is user-friendly and intuitive - Improve the visual appeal of the platform Ideal Skills & Experience: - Previous experience designing for web platforms - Familiarity with UX/UI principles and best practices - Strong portfolio demonstrating your design skills - Experience with MVP (Minimum Viable Product) stage projects is a plus - Ability to understand and translate user needs into a visually pleasing design PiipAi is hiring a UX/UI DESIGNER We are looking an experienced UX/UI DESIGNER to join our team. We are looking for someone who has ● An organized, detailed, analytical, and process-oriented mindset ● Strong communication skills to present ideas and to help people understand the rati...

I'm in need of an ASP.NET expert to help me with a project. - I need the project to be developed using ASP.NET - Your understanding of the ASP.NET framework is crucial in ensuring the project is efficient and well-structured. If you are good fit to this task, please bid with 'asp.net'. thanks

I'm in need of an Android app developer to create a simple yet effective Mess Attendance Application. This app is aimed at students who need to keep track of their attendance in the mess. Key Features: - **User Authentication**: The app should ensure that only registered students can use it. - **Notifications**: It should provide notifications to remind students to mark their attendance. - **Mark Attendance**: The core function of the app is to allow students to mark their attendance digitally. Current Data Recording: The attendance data is currently being recorded manually in paper registers. The goal of this application is to digitize this process, making it more efficient and accessible for all the students. Design is already in Figma File

esse e o modelo atual que uso e preciso melhorar ele eu preciso de imagens de alta qualidade: Utilize imagens que mostrem painéis solares instalados em propriedades residenciais e comerciais semelhan... Crie um layout organizado e fácil de seguir. Mantenha a consistência no design em todas as páginas da proposta. Exemplos de recursos visuais que você pode usar em sua proposta: Imagens de painéis solares instalados em propriedades residenciais e comerciais Gráficos que mostram o potencial de economia de energia com energia solar Tabelas que comparam os custos de energia solar com outras fontes de energia Diagramas que mostram como funciona um sistema de energia solar Testemunhos de clientes satisfeitos

Adjust 5 - 12 v dc with digital potentiometer and RF module . Simple project . Microcontroller based

I'm seeking to upgrade my existing 6.2 kW solar system. I need assistance with redesigning the system by adding four new panels. Additionally, I require the completion of the one-line diagram and approval from both a structural engineer and an electrical engineer.