Software Engineer - Reinforcement Learning

Duku AI; London; On-site; GBP 40,000 - 60,000; Full time

Job summary

A tech startup specializing in AI agents is looking for a Software Engineer specializing in Reinforcement Learning to build autonomous testing solutions. The role emphasizes rapid deployment, collaboration, and innovation in AI technologies. Ideal candidates thrive in dynamic environments and have experience with AI tools. This full-time position is based in London.

Qualifications

• Experience shipping AI features in production.
• Ability to adapt quickly in a startup environment.
• Mindset focused on outcomes over outputs.

Responsibilities

• Deploy code daily with a focus on rapid learning.
• Collaborate with users to shape product direction.
• Design AI agents that learn and adapt effectively.
• Manage the entire technology stack from commit to production.
• Conduct real experiments on models and pipelines.

Skills

Fluency with AI/LLMs

Relentless drive

Startup scar tissue

Product obsession

Tools

Python

TypeScript

Job description

Overview

Software Engineer - Reinforcement Learning

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
• Product obsession: You care more about outcomes than outputs

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.

Seniority level

• Entry level

Employment type

• Full-time

Job function

• Engineering and Information Technology

Industries

• Technology, Information and Internet