Principal AI Engineer: Agentic Dev Platforms

Areti Group | B Corp™; City Of London; Hybrid; GBP 120,000 - 160,000; Full time

Job summary

Areti Group | B Corpe in London is seeking a hands-on Staff/Principal AI Engineer to shape how AI and coding agents are used across engineering. You’ll build platforms, write production code and drive developer tooling in a hybrid contract role.

Leading the implementation of Agentic AI, RAG workflows, and internal agent frameworks, you’ll influence engineering teams with strong technical judgement while delivering reusable capabilities, security, and quality across the software stack.

Qualifications

• Strong commercial software engineering background.
• Experience building and shipping production systems.
• Hands-on coding in a modern software stack, preferably Python.

Responsibilities

• Build shared AI and developer-platform capabilities used by engineering teams.
• Create reusable tooling, SDKs, agent frameworks and engineering patterns.
• Use coding agents such as Claude Code, Codex and Cursor in your workflow.
• Build and operate MCP, Agentic AI, RAG and multi-agent capabilities.
• Establish evaluation, testing and release controls for AI-generated software.
• Improve developer productivity, CI/CD, testing and repository quality.

Skills

Strong commercial software engineering

Hands-on coding

Production systems delivery

Python proficiency

Tools

LangGraph

Job description

Areti Group | B Corpe in London is seeking a hands-on Staff/Principal AI Engineer to shape how AI and coding agents are used across engineering. You’ll build platforms, write production code and drive developer tooling in a hybrid contract role.

Leading the implementation of Agentic AI, RAG workflows, and internal agent frameworks, you’ll influence engineering teams with strong technical judgement while delivering reusable capabilities, security, and quality across the software stack.