Senior Python AI Engineer: RAG & LangChain, Hybrid

WTW; Greater London; Híbrido; GBP 90 000 - 130 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

25 days holiday

Hybrid working

Private healthcare

Life insurance

Group income protection

Pension with company match up to 10%

Volunteer day

Share scheme

EV car scheme

Cycle-to-work

Dental cover

Optical cover

Critical illness protection

Resumo da oferta

WTW is seeking a Senior Python AI Engineer to build a modern, AI-enabled HR Expert application. You will craft AI-powered services, orchestration workflows and RAG pipelines, integrating with enterprise systems and Azure services.

You’ll contribute to scalable backend APIs with FastAPI, collaborate with architects and product owners, and help establish robust testing and observability for production-grade AI software.

Qualificações

• Strong Python development experience in production applications.
• Experience building APIs and backend services, ideally with FastAPI.
• Proven experience with LLMs, LangChain and LangGraph, and agentic workflows.
• Experience developing RAG solutions and integrating multiple systems via REST APIs.
• Solid testing, version control, CI/CD practices and production quality software.

Responsabilidades

• Design, develop and maintain AI-powered application services using Python.
• Build and evolve agentic workflows and AI orchestration with LangGraph and LangChain.
• Develop scalable APIs and backend services using FastAPI.
• Design and implement RAG pipelines combining LLMs with enterprise data sources.
• Work on retrieval strategies including vector, metadata and graph-based retrieval.
• Contribute to architecture and implementation of complex AI workflows with multiple agents and data sources.
• Integrate AI services with the wider HR Expert application and enterprise systems.
• Develop and deploy solutions on Microsoft Azure across diverse data stores.
• Collaborate with architects, developers and product owners to turn requirements into robust solutions.
• Participate in design reviews, code reviews and engineering decisions.
• Help establish testing, observability and maintainability practices for AI apps.
• Investigate new AI technologies and assess practical value for the product.

Conhecimentos

Python

FastAPI

LangChain/LangGraph

LLMs

API design

CI/CD

Testing

Production software

Ferramentas

Azure OpenAI

Docker

Kubernetes

Graph DB

ArangoDB

Descrição da oferta de emprego

WTW is seeking a Senior Python AI Engineer to build a modern, AI-enabled HR Expert application. You will craft AI-powered services, orchestration workflows and RAG pipelines, integrating with enterprise systems and Azure services.

You’ll contribute to scalable backend APIs with FastAPI, collaborate with architects and product owners, and help establish robust testing and observability for production-grade AI software.