Software Engineer (Backend)

For Digital Hub Warsaw, we are looking for:

Software Engineer (Backend)

You’ll build and extend the backend of myGenAssist, an enterprise AI assistant platform. The backend is a FastAPI application that orchestrates LLM interactions, manages agent workflows with LangChain/LangGraph, handles document processing pipelines, and exposes tools via MCP (Model Context Protocol).

Key Tasks & Responsibilities:

• Design and implement async APIs using FastAPI, following our patterns for session management, API versioning, and domain-driven structure.

• Build and evolve AI agent workflows using LangChain and LangGraph — tool integration, state persistence, multi-step reasoning.

• Design and optimize database schemas with SQLModel/SQLAlchemy and PostgreSQL, including migrations and vector search (pgvector, Qdrant).

• Build background job pipelines with RQ (Redis Queue) for document processing, knowledge base indexing, and long-running tasks.

• Implement observability using OpenTelemetry, Langfuse, Prometheus, and Grafana.

• Write tests using pytest with parallel execution, covering unit, integration, and RAG evaluation.

• Enforce code quality through reviews and adherence to security best practices (OWASP).

  
  

Qualifications & Competencies (education, skills, experience):

• 3+ years with Python in production backend systems

• Strong FastAPI experience (async/await, dependency injection, middleware)

• SQLAlchemy or SQLModel with PostgreSQL

• Redis for caching and task queues

• Experience integrating LLMs via API (OpenAI SDK or similar)

• Testing with pytest

• Docker for development and deployment

• Understanding of async Python (asyncio, concurrent session management)

• Git and PR-based workflow

  Nice to Have

• LangChain / LangGraph for agent orchestration

• Vector databases (Qdrant, pgvector) and RAG patterns

• MCP (Model Context Protocol)

• Document processing pipelines (Docling, Unstructured)

• OpenTelemetry and distributed tracing

• Kubernetes basics (we run on EKS)

• AWS services (S3, Secrets Manager)

• OAuth2/JWT authentication

• Agile/Scrum experience

What do We offer: 

• A flexible, remote-hybrid work model 

• Great workplace in a new modern office in Warsaw

• Career development, 360° Feedback & Mentoring programme

• Wide access to professional development tools, trainings, & conferences

• Company Bonus & Reward Structure 

• VIP Medical Care Package (including Dental & Mental health)

• Holiday allowance (“Wczasy pod gruszą”)

• Life & Travel Insurance

• Pension plan

• Co-financed sport card - FitProfit

• Meals Subsidy in Office 

• Budget for Home Office Setup & Maintenance

• Access to Company Game Room equipped with table tennis, soccer table, Sony PlayStation 5 and Xbox Series X consoles setup with premium game passes, and massage chairs

• Tailored-made support in relocation to Warsaw when needed

• Please send your CV in English

WORK LOCATION: WARSAW AL. JEROZOLIMSKIE 158