Junior Strong/Middle Full Stack Developer (USA project)

We are looking for a Junior Strong/Middle 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 — file storage, communication platforms, and project management systems into an AI-powered knowledge layer. You’ll be working with a skilled team on a scalable, high-impact system using up-to-date technologies.

Requirements:
— 2+ 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 (authorization code grant, token refresh, service-to-service auth).
— 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 — integration work requires debugging across multiple systems and APIs.
— A proactive, organized, and independent approach to work. You’ll own features end-to-end, from database schema to UI.
— Upper-intermediate or higher English proficiency, enabling effective communication within an international team.

Nice to have:
— Familiarity with third-party APIs.
— Experience with AI/LLM integrations or working on AI-adjacent products.
— Familiarity with OpenTelemetry, structured logging, or observability tooling.

Responsibilities:
— 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.

Interview stages:
— HR interview (30 minutes).
— Technical interview (1 hour).
— Interview with the customer (1 hour).
— Job offer 🎉🎉🎉

We offer:
— 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.

Let’s create value together!