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September 2, 2026

Full Stack Developer (Node.js/React)

Mid • On-site

Krakow, MA, Poland

Your role

As a Full Stack Engineer for Neo, this role focuses on building the next generation of a Group-wide AI platform connecting employees with tools, data, and intelligent workflows. It combines frontend, backend, and AI-powered product development, with a strong emphasis on scalability, technical quality, and fast iteration. The work directly contributes to shaping user-facing AI solutions and delivering reliable, production-ready systems.

Your tasks

  • Build interactive and scalable frontend applications using React with a focus on performance and usability.
  • Develop backend services and APIs with JavaScript/TypeScript and Node.js frameworks (Express.js, NestJS).
  • Create Python-based AI/LLM components, data-processing logic, and automation scripts.
  • Develop middleware connecting frontend, AI backends, and enterprise systems, including sessions, prompts, routing, and permissions.
  • Support AI-driven product features such as conversational interfaces, RAG flows, and structured responses.
  • Integrate with enterprise systems, SaaS platforms, and automation tools.
  • Work with cloud services, preferably GCP, to enable scalable and production-ready deployments.
  • Collaborate cross-functionally and prototype, test, and iterate in fast-changing AI environments.

Your profile

  • Degree in Computer Science, Engineering, or equivalent practical experience.
  • Strong hands-on full-stack experience across frontend, backend, and APIs.
  • Solid expertise in React and modern frontend development practices.
  • Experience with Node.js, JavaScript/TypeScript, and backend frameworks.
  • Strong Python skills, ideally applied in AI/LLM or data-processing contexts.
  • Good understanding of APIs, microservices, authentication, and secure integrations.
  • Familiarity with AI application patterns such as LLMs, RAG, embeddings, and prompt engineering.
  • Experience with cloud platforms, CI/CD, Docker, and complex systems, combined with a product-oriented mindset.

What You'll love about working here

  • Well-being culture: medical care with Medicover, private life insurance, and a sports card.
  • Therapeutical support through the Helpline and the educational podcast “Let's talk about wellbeing”.
  • Access to over 70 training tracks with certification opportunities, including GenAI, Architects, and Google, on the NEXT platform.
  • Free access to Education First languages platform, TED Talks, and Udemy Business materials and training.
  • Opportunity to work with cutting-edge technologies and platforms.
  • Community Hub with over 20 professional communities, including Salesforce, Java, Cloud, IoT, Agile, and AI.

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