Software Engineer (Backend)

At Bayer we’re visionaries, driven to solve the world’s toughest challenges and striving for a world where ,Health for all, Hunger for none’ is no longer a dream, but a real possibility. We’re doing it with energy, curiosity and sheer dedication, always learning from unique perspectives of those around us, expanding our thinking, growing our capabilities and redefining ‘impossible’. There are so many reasons to join us. If you’re hungry to build a varied and meaningful career in a community of brilliant and diverse minds to make a real difference, there’s only one choice.

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

Location:

Poland : Mazowieckie : Warszawa  

Division:
CH

Reference Code:

851299