Senior Full Stack Engineer (React + Node.js) – Remote, Contract B2B

We’re looking for a Senior Full-stack Engineer to join a fast-growing startup reinventing how people experience video entertainment. You’ll work on cutting-edge, mobile-first applications at the intersection of AI, video streaming, and high-scale user experiences.

What you’ll do:

• Teaming up with the founding crew to help shape our product direction.
• Building and maintaining high-quality, performant React-based web and mobile-first UIs.
• Designing and building Node.js APIs and backend microservices.
• Connecting the frontend to complex video and data pipelines.
• Ensuring seamless integration of 9:16 mobile-first video experiences.
• Building features end-to-end: idea → design → development → testing → launch.
• Writing clean, modular, testable, and maintainable code across the stack.
• Collaborating with Product, Design, and AI engineers to push the boundaries of short-form storytelling.
• Operating with autonomy and ownership, making technical decisions that directly impact millions of users.

What we’re looking for:

• 5+ years of professional fullstack development experience.
• 3+ years of hands-on experience with React (Hooks, Context, state management, performance optimization).
• 3+ years of experience building Node.js backend systems (Express, NestJS, or similar frameworks).
• Strong understanding of JavaScript (ES6+) and TypeScript.
• Experience designing and building APIs (REST and/or GraphQL).
• Solid experience with relational (Postgres/MySQL) and NoSQL databases (MongoDB, DynamoDB, etc.).
• Experience deploying production apps in AWS / GCP / Azure.
• Familiarity with CI/CD, Docker, and scalable system design.
• Excellent communication and collaboration skills.
• Background in developing B2B/SMB web platforms.
• Highly independent, accountable, and a team player with a startup mindset.

Nice to Have

• Experience with React Native (or another mobile framework).
• Background in video streaming, content platforms, or social apps.
• Familiarity with AI/ML integrations (LLMs, prompt engineering, agents).
• Experience with real-time features (WebSockets, pub/sub systems).
• Prior work at a high-scale consumer product (millions of users).