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September 28, 2026

Backend Developer (Generative AI)

Mid • Remote

125 - 145 PLN/yr

Warsaw, Poland

Quick Facts

  • Role focus: Backend/Fullstack development with a strong emphasis on Generative AI and data sovereignty (Data Spaces)
  • Project: Delivery phase integrating Generative AI into a data sovereignty environment
  • Work model: Fully remote

Description

You will design, develop, and implement Generative AI solutions—particularly agent-based, multimodal systems—by integrating LLM/NLP capabilities (including image generation) and building secure backend services. The work includes end-to-end feature development (frontend and backend) and scalable AI/data services under data sovereignty and security policy constraints.

Responsibilities

  • Design, develop, and deploy Generative AI solutions
  • Implement GenAI applications integrating LLM, NLP, image generation, and multimodal AI
  • Use cloud platforms and distributed-compute tools to build scalable AI solutions
  • Develop end-to-end functionality across frontend and backend
  • Build and maintain backend services with Python (FastAPI) and REST APIs
  • Develop scalable data models and services
  • Implement secure authentication and authorization
  • Integrate security validation tools and packages
  • Develop and maintain agentic applications

Benefits

  • B2B contract for GenAI + Data Spaces/data sovereignty architecture projects
  • High autonomy in selecting tools and making architectural decisions
  • Fully remote work

Requirements

  • Minimum 2 years of experience in a similar Backend/Fullstack role
  • Knowledge of the Claude ecosystem and MCP (Model Context Protocol)
  • Hands-on experience with LangGraph, LangChain, Haystack, LiteLLM, self-hosted vLLM, and OpenWebUI
  • Practical experience with embeddings (e.g., BGE-M3)
  • Strong Python skills with FastAPI and REST API design
  • Experience with PostgreSQL and vector databases (pgvector, Qdrant)
  • Knowledge of graph and semantic technologies (Neo4j, Apache Jena/SHACL)
  • Experience with entity resolution and data-exchange ecosystems (Splink, Eclipse EDC, Eclipse Tractus-X, Franky-X)
  • Practical knowledge of data sovereignty, security policies, and auditing (ODRL, OPA, Keycloak, immudb)
  • Experience with Docker and Kubernetes
  • Experience setting up and maintaining CI/CD pipelines (GitHub Actions, GitLab CI or similar)
  • Experience with hybrid infrastructure and restrictive access-policy environments
  • Basic frontend experience with React, TypeScript, Next.js (or similar SPA frameworks)

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