Senior Python GenAI Engineer — Production AI Apps (Hybrid)

83zero Ltd; Greater London; Hybrid; GBP 60,000 - 70,000; Full time

Benefits offered by this job

Healthcare options

Job summary

83zero Ltd is seeking a Senior Python Developer to lead GenAI projects. You’ll write production-grade Python, build APIs and AI applications, and bring GenAI/LLM ideas from POC to production for enterprise clients.

This permanent, hybrid role involves 2 days per week onsite with locations including London and other UK cities. You’ll work with OpenAI, LangChain, vector databases, and cloud tools such as AWS or Azure, delivering scalable GenAI solutions.

Qualifications

• Must have strong commercial Python development experience.
• Proven leadership and mentoring experience.
• Hands-on experience with LLMs, Generative AI and RAG.

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 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.

Skills

Python development

LLMs/RAG

Leadership & mentoring

AI frameworks LangChain LangGraph Crew

Vector databases

CI/CD

Cloud (AWS/Azure)

Docker & Kubernetes

Software testing & Git

Agile engineering

React/TypeScript

Tools

Docker

Kubernetes

LangChain

LangGraph

CrewAI

Pinecone

Qdrant

ChromaDB

PGVector

OpenAI

Anthropic

Mistral

Llama

PostgreSQL

MongoDB

Job description

83zero Ltd is seeking a Senior Python Developer to lead GenAI projects. You’ll write production-grade Python, build APIs and AI applications, and bring GenAI/LLM ideas from POC to production for enterprise clients.

This permanent, hybrid role involves 2 days per week onsite with locations including London and other UK cities. You’ll work with OpenAI, LangChain, vector databases, and cloud tools such as AWS or Azure, delivering scalable GenAI solutions.