Python Developer - Genai

83zero Ltd; United Kingdom; Hybrid; GBP 45,000 - 55,000; Full time

Benefits offered by this job

Healthcare options

Job summary

83zero Ltd. is seeking a hands-on Python Developer specializing in GenAI to build production-grade AI applications and APIs using Python, FastAPI and modern AI frameworks.

You will work across the development lifecycle, delivering scalable solutions that leverage LLMs, RAG, and vector databases for enterprise clients. You’ll collaborate with engineers, architects and stakeholders, deploying on AWS/Azure with Docker and Kubernetes, and maintaining best-practice software engineering standards.

Qualifications

• Strong commercial Python development experience.
• Experience building APIs, microservices and back-end 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.

Responsibilities

• 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 frameworks.
• 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.
• Collaborate with engineers, architects and client stakeholders.

Skills

Python

APIs & microservices

LLMs

GenAI

RAG

Docker

Kubernetes

Tools

LangChain

LangGraph

CrewAI

Pinecone

Qdrant

ChromaDB

PGVector

AWS

Azure

Job description

Python Developer - GenAI

• Salary: £45,000 - £55,000 plus benefits, perks and healthcare options
• Locations: London, Bristol, Manchester, Glasgow or Newcastle
• Job Type: Permanent | Hybrid/2 days per week onsite | Occasional travel to client sites
• Requirements: SC eligibility & full right to work in the UK required (no sponsorship available)

The Role:

We're looking for hands‑on Python Developers at Consultant 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 life cycle, 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 frameworks
• 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

What we’re looking for:

• Strong commercial Python development experience
• Experience building APIs, microservices and Back End 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 practicesExperience 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

Why this role?

You'll work on real-world AI engineering projects, combining strong Python software development with modern GenAI technologies.
The focus is on building and engineering, giving you the opportunity to write code, develop AI applications and solve technical problems while working with the latest LLM and RAG technologies.
You'll also have the opportunity to work directly with enterprise clients and develop your experience across both software engineering and Generative AI.

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.