Senior NLP / Python Developer

We are looking for an experienced Senior NLP & Python Developer to join our team on a long-term project. You will be responsible for optimizing NLP/RAG pipelines, refactoring backend services, and driving a full database overhaul. The system is built on a modular microservices architecture with Python 3.11, FastAPI, Flask, SQLAlchemy, PostgreSQL, Docker, and Kubernetes on AWS. The NLP stack includes LangChain, LangGraph, LlamaIndex, and Weaviate.
 

Requirements

• 5+ years of commercial development experience with Python.
• Strong expertise in NLP (building and optimizing pipelines).
• Hands-on experience with LangChain, LangGraph, LlamaIndex.
• Proven skills in optimizing NLP pipelines and parallelizing sequential processes.
• Proficiency with FastAPI, Flask, SQLAlchemy.
• Deep knowledge of PostgreSQL (schema design, query optimization, migrations).
• Experience with microservices, Docker, Kubernetes.
• Familiarity with AWS services (Secrets Manager, CloudFront), CI/CD, and structured testing.
• Strong communication skills and ability to work independently in a distributed team.

Responsibilities

• Database Overhaul: Refactor PostgreSQL schema, resolve migration issues, improve data integrity and scalability.
• NLP/RAG Optimization: Refactor LangChain pipelines, implement runtime model selection, optimize Weaviate vector search, reduce LLM costs.
• Backend Refactoring: Split monolithic parts into microservices, clean up old code, improve documentation.
• System Hardening & Testing: Increase coverage, build CI/CD pipelines, enhance security and observability.
   

Nice to Have

• Experience with Poetry, pre-commit, Ruff.
• Background in re-architecting large-scale systems.

Benefits

• Great company atmosphere and open communication.
• 20 working days of paid vacation + 20 paid sick days.
• Professional development support.
• Free English classes.
• Financial support for education and certifications.
• Financial support for sports and wellness.
• Accounting support for contractors.