Middle/Middle Strong Full Stack Developer [React + Node.js]

We are looking for a Middle/Middle Strong Full Stack Developer to join a USA-based project and take ownership of building and maintaining third-party integrations on a modern B2B platform. Our product helps businesses make smarter use of their data by connecting external tools into an AI-powered knowledge layer.

• Design, build, and maintain third-party integrations end-to-end: OAuth flows, API route handlers, database models, background sync workers, and admin/user-facing configuration UIs.
• Implement reliable data crawling and synchronization pipelines that run as background tasks, handling rate limiting, pagination, error recovery, and incremental sync.
• Work with PostgreSQL (Prisma) to design schemas for integration credentials, sync state, and external resource mappings.
• Build admin setup flows and user-facing integration pages using React, Next.js Server Components.
• Collaborate with the team on architecture decisions for new integrations.
• Ensure production reliability through proper error handling, OpenTelemetry instrumentation, and structured logging.
• Contribute to shared packages in our monorepo — integrations library, server actions, operations queue, and UI components.

• 3+ years of experience in web development with TypeScript and Node.js across both frontend and backend.
• Strong experience with React, including modern patterns (Server Components, Server Actions, hooks, component architecture).
• Hands-on experience building and consuming REST APIs, including OAuth 2.0 authorization flows.
• Working knowledge of relational databases and ORMs (we use PostgreSQL and Prisma).
• Experience with background job processing, task queues, or worker-based architectures (we use BullMQ with Redis/Valkey).
• Familiarity with Next.js (App Router) or a similar full-stack framework.
• Proficiency with Git and comfort working in a monorepo (pnpm + Turborepo).
• Strong problem-solving skills and attention to detail.
• A proactive, organized, and independent approach to work.
• Upper-intermediate or higher English proficiency.

• Competitive salary.
• Challenging tasks and projects.
• Opportunities for professional development and growth.
• Flexible working hours.
• New hardware.
• Free English lessons.
• Table tennis and yoga classes.
• Availability of generators and Starlinks in the office.
• Small gym in the office.
• Adjustable height tables.
• Regular office fruit delivery and other benefits.