Hi,
I am currently working as a full-stack developer as well as a MERN developer. I am confident that I can help you to build your apps. I have been building a lot kind of apps from mobile to CRM web apps.
My main stacks: Nodejs. Javascript. Typescript, React, ReactNative. Html, Css, Vscode.
I am also familiar with tools like Jira, Slack, VsCode, Postgres.
I am totally matched your requirements.