AI Agentic Coding Engineer (GitHub & Hybrid London)

Coltech; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Coltech in London is seeking an experienced AI Software Engineer to design and implement intelligent coding agents and AI-driven workflows across the SDLC, with a focus on the GitHub ecosystem and agent-based architectures.

This hybrid, long-term role requires hands-on experience with Vibe Coding, code tooling, and CI/CD integration, plus the ability to document, test, and govern reusable Skills libraries and PromptOps standards.

Qualifications

• Recent commercial experience with Vibe Coding and AI-assisted software development.
• Hands-on experience with the GitHub ecosystem and complex GitHub-based automation.
• Experience with AI coding platforms such as Claude Code, Codex or GitHub Copilot.
• Ability to design agent-based architectures and multi-step AI workflows.

Responsibilities

• Design, build and maintain advanced AI coding and automation agents within GitHub-based workflows.
• Develop multi-step agentic workflows that extend beyond basic prompting.
• Tune and refine agents to improve reliability, performance and output quality.
• Build robust evaluation frameworks for testing AI-generated code, prompts, Skills and automated workflows.
• Establish human-in-the-loop review and approval processes before solutions are shared or deployed.
• Create and govern reusable prompt libraries, instruction sets and organisational PromptOps standards.
• Develop comprehensive Skills libraries that can be adopted across multiple engineering teams.
• Integrate AI agents with CI/CD pipelines, GitHub workflows and MCP servers.
• Embed AI-assisted development practices across the full SDLC.
• Work closely with engineering, architecture, security and platform teams.
• Maintain high standards of coding, testing, documentation and software governance.

Skills

Python

TypeScript

Rust

Golang

Java

LLM observability

CI/CD

Tools

Claude Code

Codex

GitHub Copilot

Model Context Protocol

Job description

Coltech in London is seeking an experienced AI Software Engineer to design and implement intelligent coding agents and AI-driven workflows across the SDLC, with a focus on the GitHub ecosystem and agent-based architectures.

This hybrid, long-term role requires hands-on experience with Vibe Coding, code tooling, and CI/CD integration, plus the ability to document, test, and govern reusable Skills libraries and PromptOps standards.