Founding AI Engineer: Production Agent Systems + Equity

Owen Thomas | B Corp™; Greater London; On-site; GBP 135,000 - 165,000; Full time

Benefits offered by this job

Equity

Job summary

Agentic AI in London is seeking a Founding AI Engineer to own the agent system, translating high-level requirements into production-quality software. You will design agent loops, build production evals, manage context, route between models and optimize for quality, latency and cost.

The role focuses on production-ready, agentic software beyond typical LLM wrappers, with direct collaboration with the founders and engineering team. This is a founding-stage opportunity in a high-impact project.

Qualifications

• Producing production-ready agentic systems and workflows.
• Experience building multi-step pipelines with tool-using agents.
• Strong focus on eval suites, benchmarks and regression testing.
• Understanding trade-offs between model quality, latency and cost.

Responsibilities

• Own the agent pipeline from specification to production.
• Build workflows across planning, code generation, review, testing and release.
• Develop evals and regression tooling to measure output quality and catch failures.
• Develop model routing based on quality, latency and cost.
• Build retrieval and context systems.
• Improve or replace third‑party agent infrastructure where needed.
• Experiment with new models, fine‑tuning and post‑training.

Skills

LLM/agentic systems

Multi-step pipelines

Eval & regression testing

Model routing

Tools

Tool-Using Agents

Retrieval & Context

Fine-Tuning/Post-Training

Code Generation

Job description

Agentic AI in London is seeking a Founding AI Engineer to own the agent system, translating high-level requirements into production-quality software. You will design agent loops, build production evals, manage context, route between models and optimize for quality, latency and cost.

The role focuses on production-ready, agentic software beyond typical LLM wrappers, with direct collaboration with the founders and engineering team. This is a founding-stage opportunity in a high-impact project.