GenAI Python Developer — Production APIs & AI Apps

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

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.