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# Senior Python Developer - AI

- **Company:** 83zero Ltd
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £60,000.0 - £70,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Microsoft Azure, Databases, Continuous Integration, Github, Python (Programming Language), PostgreSQL, MongoDB, Scaled Agile Framework, Search Technologies, Software Construction, Software Engineering, TypeScript, ReactJS, Large Language Models, Prompt Engineering, Generative AI, Backend, Gitlab, Git, Fastapi, Kubernetes, Virtual Agents, Api Design, Terraform, Docker, Jenkins, Programming Languages, Microservices
- **Published:** September 24, 2026
- **Apply:** https://www.totaljobs.com/job/senior-python-developer/83zero-limited-job108035305

## About the Role

* Proven leadership and mentoring experience required for Senior Consultant level.
 * Strong commercial Python development experience
 * Experience building APIs, microservices and backend applications
 * Hands-on experience with LLMs, Generative AI and RAG
 * Experience with AI frameworks such as LangChain, LangGraph or CrewAI
 * Experience with vector databases and semantic search
 * Experience with OpenAI, Anthropic, Mistral, Llama or similar
 * Good software engineering, testing and Git practices
 * Experience with AWS or Azure, Docker and ideally Kubernetes
 * Experience with PostgreSQL, MongoDB or similar databases
 * Experience with CI/CD using GitHub, GitLab or Jenkins
 * Agile engineering experience
 * Experience with AI agents, tool calling, embeddings, prompt engineering or LLM observability is beneficial
 * React/TypeScript and Terraform/IaC experience is beneficial
 * Experience taking GenAI POCs into production is highly beneficial, If you're a strong Python engineer with hands-on GenAI experience and want to build production-level AI applications, we'd like to hear from you.

## Description

We're looking for hands-on Python Developers at Senior level who have experience building software and a practical understanding of Generative AI, LLMs and RAG.
This is a coding-focused role for engineers who enjoy building real solutions. You'll use Python as your primary development language, developing APIs, services and AI applications using technologies such as LLMs, RAG, AI agents and vector search.
You'll work across the development lifecycle, helping take GenAI ideas and POC's through to robust, production-ready applications for enterprise clients.

What you'll be doing:

 * Build production applications and APIs using Python and FastAPI
 * Develop LLM, RAG and AI agent solutions
 * Build RAG pipelines covering embeddings, retrieval and generation
 * Work with OpenAI, Anthropic, Mistral, Llama and similar LLMs
 * Use LangChain, LangGraph, CrewAI or similar AI framework
 * Work with vector databases including Pinecone, Qdrant, ChromaDB and PGVector
 * Take GenAI POCs into production and scale them
 * Build APIs, microservices and AI integrations
 * Deploy solutions using AWS/Azure, Docker and Kubernetes
 * Write clean, testable and maintainable Python code
 * Work with PostgreSQL, MongoDB, Git and CI/CD
 * Collaborate with engineers, architects and client stakeholders


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