Senior Python Engineer

Senior Python Engineer – AI & Agentic Systems | London | £100k

Build production AI agents

I'm working with a high-growth, technology-led business that is investing heavily in AI and looking for a Senior Python Engineer to help build the next generation of its engineering platform.

This is not a traditional Data Science or ML role .

You’ll be a hands-on software engineer building production-grade Python services, APIs and AI-powered systems , with real ownership over architecture, infrastructure and delivery.

What you'll be working on

You’ll help build and scale an agentic AI platform that brings AI into real business workflows, with a strong focus on security, reliability and engineering quality.

You’ll be involved in:

• Building production Python services and APIs
• Designing and integrating LLM-powered applications and AI agents
• Agent orchestration, tool calling and RAG
• Authentication, permissions and AI guardrails
• Evaluation, monitoring and observability
• Cloud infrastructure and deployment
• Docker, CI/CD and production engineering
• Using tools such as Claude Code, Cursor or similar
• Helping shape how AI is adopted across the wider engineering team

What we're looking for

We're looking for a strong software engineer first , with genuine experience building with AI.

You’ll ideally have:

• Senior-level backend/software engineering experience
• Experience building APIs, services or microservices
• Production experience with LLMs, GenAI or AI agents
• Experience with RAG, tool calling, LangChain, LangGraph, MCP or similar
• AWS or Azure experience
• Strong understanding of testing, security and production systems
• Experience using AI coding tools such as Cursor or Claude Code

Most importantly, we're looking for someone who has actually built and shipped AI-powered systems , rather than someone whose AI experience is limited to experimentation.

This is a genuine opportunity to have a major influence on how AI is used across an engineering organisation .

You’ll have ownership over technical decisions, work on production agentic systems and help shape the standards around security, deployment and AI-assisted development.

If you're a Senior Python Engineer who wants to move deeper into production AI and agentic systems , I'd love to hear from you.

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