Freelance Full-Stack Web App Developer
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Key skills for this role
About the Role
Mindrift is looking for a skilled Full-Stack Web App Developer to build interactive browser-based applications within a hybrid AI + human environment. You will collaborate with AI agents, providing full-stack engineering expertise and quality control.
Key Skills for This Role
Responsibilities
- Build interactive web applications with frontend (React, Next.js, Vue, or similar) and a backend API (Python/FastAPI/Flask or Node/Express)
- Design and implement data models, schemas, and persistence layers using SQL (PostgreSQL, SQLite) or NoSQL stores
- Implement authentication, sessions, and basic role based access where needed
- Integrate third party APIs and AI/LLM services (OpenAI, Anthropic, or similar) into product features
- Handle state management, user input validation, error states, and loading states cleanly
- Build standalone Python tools and scripts where required by the task (data processing, API clients, lightweight backend utilities)
- Evaluate AI generated full stack code and refactor it for correctness, security, performance, and maintainability
- Write clear, testable code and debug end to end issues across frontend, backend, and database
Requirements
- At least 3 years of relevant experience in full stack web development or shipping interactive web applications
- Strong command of JavaScript/TypeScript and at least one modern frontend framework (React, Next.js, Vue, Svelte, or similar)
- Solid backend experience in Python (FastAPI, Flask, Django) and/or Node.js (Express, NestJS)
- Hands on experience with relational databases (PostgreSQL, MySQL, SQLite) and basic schema design
- Experience implementing REST APIs, request validation, error handling, and authentication flows
- Portfolio of shipped web applications
- English proficiency: Upper intermediate (B2) or above
Full Job Posting
About the Role
- This is a freelance role for a Tendem project. As a Full Stack Web App Developer, you'll design, build, and refine browser based applications with real logic, state, persistence, and user input from habit trackers and budgeting tools to internal dashboards, mini SaaS tools, and AI powered apps.
Key Responsibilities
- Build interactive web applications with frontend (React, Next.js, Vue, or similar) and a backend API (Python/FastAPI/Flask or Node/Express).
- Design and implement data models, schemas, and persistence layers using SQL (PostgreSQL, SQLite) or NoSQL stores.
- Implement authentication, sessions, and basic role based access where needed.
- Integrate third party APIs and AI/LLM services (OpenAI, Anthropic, or similar) into product features.
- Handle state management, user input validation, error states, and loading states cleanly.
- Build standalone Python tools and scripts where required by the task (data processing, API clients, lightweight backend utilities).
- Evaluate AI generated full stack code and refactor it for correctness, security, performance, and maintainability.
- Write clear, testable code and debug end to end issues across frontend, backend, and database.
Requirements
- At least 3 years of relevant experience in full stack web development or shipping interactive web applications (required)
- Bachelor's or Master's Degree in Computer Science, Engineering, Information Technology, or related technical fields is a plus
- Strong command of JavaScript/TypeScript and at least one modern frontend framework (React, Next.js, Vue, Svelte, or similar)
- Solid backend experience in Python (FastAPI, Flask, Django) and/or Node.js (Express, NestJS)
- Hands on experience with relational databases (PostgreSQL, MySQL, SQLite) and basic schema design
- Experience implementing REST APIs, request validation, error handling, and authentication flows
- Familiarity with deployment platforms (Vercel, Netlify, Render, Fly.io, Railway, or similar)
- Experience integrating LLM APIs or other AI services into product features is a strong plus
- Comfortable with version control (Git) and basic testing practices
- Portfolio of shipped web applications (required)
- English proficiency: Upper intermediate (B2) or above (required)
Compensation
- On this project, contributors can earn up to $60 per hour equivalent, depending on their level and pace of contribution.
Why this freelance opportunity might be a great fit for you?
- Work fully remote on your own schedule with just a laptop and stable internet connection.
- Gain hands on experience in a unique hybrid environment where human expertise and AI agents collaborate seamlessly a distinctive skill set in a rapidly growing field.
- Participate in performance based bonus programs that reward high quality work and consistent delivery.
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