Senior NLP & Python Developer

Cluj-Napoca, Romania | Full-time

We can help you build an exceptional career

By joining Code4Nord, you’ll enjoy a dynamic work environment with exciting projects, tailored career growth opportunities, flexible work arrangements, modern and comfortable office spaces, and comprehensive wellness programs to support your well-being.

Senior NLP & Python Developer

Are you passionate about building cutting-edge NLP systems that push the boundaries of what’s possible with LLMs? Do you thrive on solving complex backend challenges while shaping scalable, production-ready architectures? If so, this is the perfect opportunity for you!

We’re looking for a Senior NLP & Python Developer to join our innovative team and play a key role in transforming our AI-driven platform. You’ll have the chance to architect, optimize, and scale next-generation NLP/RAG pipelines while working with a modern tech stack and collaborating with brilliant minds in a fast-paced environment.

🌟 What You’ll Work On

  • Revolutionize our NLP stack: Refactor and optimize LangChain-based RAG pipelines for blazing-fast performance and smarter cost efficiency.
  • Architect at scale: Lead a full PostgreSQL database overhaul, ensuring scalability, consistency, and reliability.
  • Refactor backend systems: Break down legacy components into modular microservices that align with the new NLP and database architecture.
  • Drive performance & security: Improve observability, testing coverage, and system hardening to meet production-grade standards.
  • Innovate with AI: Experiment with external data integrations, vector search optimization, and model orchestration to deliver state-of-the-art AI solutions.

🛠 Tech Stack You’ll Love

  • Backend: Python (3.11), FastAPI, Flask, SQLAlchemy
  • NLP/RAG: LangChain, Weaviate, embeddings, LLM orchestration
  • Infrastructure: Docker, Kubernetes, AWS (Secrets Manager, CloudFront), Terraform
  • Collaboration & Quality: CI/CD pipelines, pre-commit, Poetry, Ruff, centralized monitoring

✅ What We’re Looking For

  • 5+ years of Python experience (FastAPI, Flask, SQLAlchemy)
  • Strong background in PostgreSQL schema design, migration, and optimization
  • Proven expertise in LangChain, vector databases (Weaviate), and embedding models
  • Experience with microservices & containerized deployments (Docker, Kubernetes)
  • Knowledge of secure coding, testing, and system observability
  • A self-starter mindset with excellent problem-solving and communication skills

🌍 Why Join Us?

  • Work on high-impact projects that redefine how NLP pipelines perform in real-world environments
  • Collaborate with a forward-thinking, international team passionate about AI and system scalability
  • Full-time, long-term role with a competitive compensation package
  • Flexible, remote-first culture with working hours from 9:00 – 18:00 CET
  • The opportunity to shape the future of AI-driven solutions and grow your career at the forefront of innovation






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    George

    George Toman

    CEO

    Jan de Blanck

    Partner

    Reino Malm

    Country Director Finland

    Diederik Klaassen

    Country Director Netherlands

    Thor Bjorn Preisler

    Country Director UK / Ireland

    Frederik Rasmussen

    Country Director Denmark / Sweden and Iceland