Freelance Full-Stack Web App Developer

Overview

• Mindrift is looking for skilled Full-Stack Web App Developers (JavaScript/TypeScript + Python or Node) to join the Tendem project (https://tendem.
• ai/) and build interactive browser-based applications within our hybrid AI + human environment.
• In this role, as an AI Pilot – that's how we refer to this position at Mindrift – you'll collaborate with Tendem Agents that handle repetitive tasks, while you provide full-stack engineering expertise, architectural judgment, and quality control to ensure web apps are functional, robust, and ready for real users.
• This part-time remote opportunity is ideal for professionals with hands-on experience in modern frontend frameworks, backend APIs, databases, and shipping interactive web products end-to-end.
• What We Do The Mindrift platform connects specialists with AI projects from major tech innovators.
• Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe.
• 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.
• You may also work on standalone Python applications and data-processing scripts that sit alongside or behind these products.
• 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 and benefits 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 Candidates should have a strong foundation in full-stack web development, modern frontend frameworks, backend architecture, and building interactive browser-based applications end-to-end.
• We are looking for specialists who can confidently work across frontend, backend, databases, and APIs, design robust application logic, and refine AI-assisted output into production-ready products.
• Strong problem-solving skills, attention to detail, and the ability to independently architect and ship complete features are essential 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 Strong attention to detail and commitment to building working, robust products — not demos.
• Self-directed work ethic with the ability to architect, build, and ship features independently Portfolio of shipped web applications (required) English proficiency: Upper-intermediate (B2) or above (required) Project time expectations For this project, tasks are estimated to require around 10–20 hours per week during active phases, based on project requirements.
• This is an estimate, not a guaranteed workload, and applies only while the project is active.
• Compensation On this project, contributors can earn up to $60 per hour equivalent , depending on their level and pace of contribution.
• Compensation varies across projects depending on scope, complexity, and required expertise.
• Please note that other projects on the platform may offer different earning levels based on their requirements.
• 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.