Senior Software Engineer - Machine Learning

Antler; City Of London; On-site; GBP 60,000 - 80,000; Full time

Job summary

A tech-driven company in London is seeking a software engineer to join their team focused on building autonomous agents for software quality assurance. The ideal candidate will have a strong background in AI, full-stack development, and a mindset geared towards rapid execution. Responsibilities include deploying code daily, training AI agents, and shaping the product roadmap through user interaction. A passion for outcomes over outputs is essential.

Qualifications

• Experience shipping product with no safety net.
• Fluency with AI technologies and LLMs.
• Experience in both frontend and backend development.

Responsibilities

• Deploy code daily to improve software quality.
• Interact with users to shape product roadmap.
• Design and train AI agents for automated testing.

Skills

Relentless drive

Fluency with AI/LLMs

Full-stack firepower

Product obsession

Experimental instinct

Tools

Python

TypeScript

LangChain

Job description

Change Software Forever

QA slows the world down. Flaky tests kill trust, stall releases, and bleed engineering velocity.

Duku AI is ending that era.

We’re building autonomous agents that think like engineers: they run every critical user journey, catch failures before users do, and self-heal as the codebase evolves. Real AI teammates, not test scripts that break on impact.

We’re venture-backed and led by operators who’ve scaled Meta’s testing infrastructure, launched Uber’s global playbooks, and grew Deliveroo from zero to hypergrowth. We know what elite execution looks like and we’re hunting for one more builder to help us rewrite the rules of software quality.

What You’ll Do

• Ship fast, learn faster : We deploy daily, not monthly
• Talk to users, shape the roadmap : Sit in the trenches with founders on calls that define what we build
• Train AI agents: Design LLM-powered testers that explore, learn, and adapt in real time
• Own the stack :Python, TypeScript, cloud infra, from commit to production
• Turn prototypes into production : Run real experiments on models, embeddings, and retrieval pipelines

What We’re Looking For

• Relentless drive: You execute fast, adapt faster
• Startup scar tissue : You’ve shipped product with no safety net
• Fluency with AI/LLMs : LangChain, vector stores, prompt engineering
• Full-stack firepower : Frontend, backend, infra, no silos
• Product obsession : You care more about outcomes than outputs
• Experimental instinct: You build → test → learn → repeat

Ideal Background

There’s no perfect pedigree. We hire for mindset, not credentials. That said, you might have:

• Shipped AI features in prod
• Built something from 0 to 1
• Thrived in chaos with high ownership

Why This Matters

Software is accelerating. QA hasn’t kept up. Autonomous testing is inevitable, and we’re building it.

Five years from now, every high-velocity team will rely on AI agents like ours to ship faster, safer, and smarter.

Join now, and help make that future real, before someone else does.