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August 14, 2026

Full Stack Developer (Node.js+TypeScript)

Senior • Remote

Warsaw, Poland

Description

The project modernizes a cloud-based quality intelligence platform and develops an AI agent orchestration system with an embedded assistant chatbot. It includes building APIs and MCP integrations, event-driven workflows, state management, secure deployment, and scalable GenAI capabilities in an AWS-based microservices environment.

Responsibilities

  • Design and build scalable agentic systems and GenAI-powered applications.
  • Develop APIs, MCP integrations, event-driven services, and orchestration workflows.
  • Deploy, monitor, and continuously improve agentic solutions in AWS production environments.
  • Collaborate with product and engineering teams on system architecture and technical implementation.
  • Design and manage persistent state and context across long-running, multi-step agent workflows.
  • Optimize orchestration for reliability, latency, and cost at scale, including bulk and asynchronous operations and fan-out across microservices.

Must-haves

  • 4+ years of software engineering experience building and deploying production systems.
  • Strong proficiency in TypeScript/Node.js and Python for AI-agent and orchestration development.
  • Hands-on production experience with GenAI, agentic, or multi-agent systems.
  • Production experience with real users, including failure handling, retries, token/context budget optimization, and output-quality evaluation.
  • Experience designing APIs, microservices, event-driven architectures, orchestration workflows, and state management.
  • Hands-on MCP (Model Context Protocol) experience, including designing servers and tools around API and service boundaries.
  • Experience deploying and operating cloud-native applications with Docker and AWS ECS/Fargate.
  • Upper-Intermediate English or higher.

Nice-to-haves

  • Production experience with LangGraph, LangChain, or similar agent frameworks.
  • Experience with n8n or similar low-code workflow orchestration platforms.
  • Experience with LiteLLM or other LLM gateway/proxy solutions, including cost optimization.
  • Experience with vector databases, RAG, hybrid search, re-ranking, and retrieval pipelines.
  • Familiarity with LLM evaluation and observability, including tracing and human-in-the-loop approaches.
  • Experience with Kafka and distributed, event-driven microservice architectures.

Benefits

  • Remote, office-based, or hybrid work options.
  • Opportunity to change projects and develop expertise in different business domains.
  • Mentoring and onboarding support.
  • Additional monthly bonus of up to EUR 1,000, depending on expertise level, included in the annual bonus.
  • Access to a corporate training portal.
  • Certification compensation, including AWS and PMP certifications.
  • Referral program.
  • Private health insurance and sports compensation, depending on employment type.

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