Python Engineer
Ncounter is working with a technology consultancy expanding its AI engineering capability across major law enforcement and public sector transformation programmes. We are looking for an experienced Python Developer who has moved beyond experimenting with Generative AI and has genuine experience engineering LLM-powered solutions for production environments.
Working within multidisciplinary consulting teams, you will help organisations explore how AI can improve complex operational processes, information discovery and decision support. You will take ideas from discovery and prototype stages into secure, reliable services, working alongside architects, consultants and frontend engineers.
What you'll be doing:
- Engineer Python backend services and APIs using FastAPI and asynchronous development patterns
- Design and integrate LLM capabilities using OpenAI, Azure OpenAI or comparable foundation models
- Build practical RAG, enterprise search and document intelligence solutions using embeddings and vector databases
- Develop prompt strategies while managing production considerations including latency, cost, retries and rate limits
- Explore agentic workflows and LLM orchestration using LangChain or similar frameworks
- Work with consultants and customer stakeholders to translate operational problems into practical AI solutions
- Improve security, testing, observability and reliability across deployed applications
What we're looking for:
- 5+ years' commercial Python engineering experience, including production backend systems
- Strong FastAPI, REST API, async Python, PostgreSQL and SQL experience
- Demonstrable experience integrating LLMs into real applications, rather than purely personal or experimental projects
- Strong Docker, Kubernetes/OpenShift, CI/CD and pytest knowledge
- Experience working with large codebases and improving existing services safely
- Knowledge of Azure, RAG, pgvector, Chroma, FAISS, Entra ID, OAuth/OIDC, Redis, Terraform, Prometheus or OpenTelemetry would strengthen your application.
Current or recently held SC clearance is required.
For an AI-focused Python Engineer looking to combine deep technical work with consultancy exposure and challenging public sector problems, contact Ncounter to discuss the opportunity.
Python Engineer in London employer: Ncounter Careers
As a leading employer in the defence sector, we offer a dynamic work environment where innovation meets security. Our South West location provides a collaborative culture that values hands-on problem-solving and practical solutions, ensuring that our employees are not just contributors but key players in transformative projects. With a focus on professional growth and a commitment to employee well-being, we provide opportunities for skill enhancement and career advancement while working alongside experienced teams dedicated to delivering impactful results.
