Freelance Full-Stack Web App Developer

Mindrift is a platform that connects specialists with innovative technology projects to develop high-quality AI technologies by combining professionals' real-world expertise with advanced AI development efforts. This role is for the Tendem project, focused on building interactive browser-based applications for real-world use cases.

• At least 3 years of relevant experience in full-stack web development or shipping interactive web applications.
• Bachelor's or Master's degree in Computer Science, Engineering, Information Technology, or related fields is a plus.
• Strong expertise in JavaScript/TypeScript and modern frontend frameworks such as React, Next.js, Vue, or Svelte.
• Solid backend experience with Python frameworks (FastAPI, Flask, Django) and/or Node.js frameworks (Express, NestJS).
• Hands-on experience with relational databases (PostgreSQL, MySQL, SQLite) and schema design.
• Experience implementing REST APIs, request validation, error handling, and authentication flows.
• Familiarity with deployment platforms such as Vercel, Netlify, Render, Fly.io, or Railway.
• Experience integrating LLM APIs or other AI services is a strong plus.
• Comfortable with version control (Git) and basic testing practices.
• Strong attention to detail and commitment to building robust, production-ready products.
• Ability to work independently and architect full features.
• Portfolio of shipped web applications required.
• English proficiency at upper-intermediate (B2) level or above.

• Build interactive web applications using frontend frameworks such as React, Next.js, or Vue and backend APIs using Python frameworks (FastAPI, Flask) or Node.js (Express).
• Design and implement data models and persistence using SQL databases (PostgreSQL, SQLite) or NoSQL stores.
• Implement authentication, session management, and role-based access control as needed.
• Integrate third-party APIs and AI/LLM services like OpenAI and Anthropic.
• Manage state, user input validation, error handling, and loading states effectively.
• Develop standalone Python tools and scripts for data processing and backend utilities.
• Review, debug, optimize, and refactor full-stack applications to enhance correctness, security, and maintainability.
• Write clear, testable code and debug issues across frontend, backend, and database layers.