Backend Engineer

We're looking for a Backend Engineer to join a small, highly autonomous team building the infrastructure that lets developers run AI agents inside their own products. This role suits someone who wants to own hard infrastructure problems end to end, not just execute tickets from a backlog.

You'll join a team scaling fast off the back of a recent Series A, where execution volume is growing faster than the infrastructure can comfortably absorb. You'll work directly with the founders on the systems powering AI agent execution at genuinely large scale.

What you'll be working on

• Building and scaling infrastructure that executes millions to billions of AI agent workflows
• Designing reliable systems that hold up under extreme concurrency and rapid server scaling
• Contributing to a major architectural shift toward micro-VM based, secure code execution
• Building observability and debugging tooling used directly by developers
• Shipping quickly in a flat, high-ownership team with no engineering managers

Technology environment

Backend: Node.js with TypeScript, Postgres, Redis

Infrastructure: Cloud infrastructure (AWS, GCP or Azure), container orchestration, micro-VM isolation technology

Product

Contributing to developer-facing tooling and, where useful, full-stack work

What you'll bring

• Strong TypeScript engineering experience, ideally where it's the majority of the codebase
• Experience building backend systems that have hit real scale, and seen things break
• A solid grasp of distributed systems, reliability, and infrastructure design
• Comfort operating across infrastructure and product layers, not just one or the other
• Strong day-to-day use of AI tooling in your own workflow
• Genuine enjoyment of open-source and developer community engagement is a plus

The impact you'll have

• Directly shaping the reliability of infrastructure used by thousands of paying customers
• Owning a meaningful piece of a major architectural migration from day one
• Working at a scale and pace usually only seen in much later-stage companies
• Contributing to a flat, no-management culture where full ownership is the expectation, not the exception

Working pattern

• Remote across the UK and Europe, with occasional in-person collaboration preferred but not required.

OR

• London hybrid 2/3 days a week in Spitalfields.

Interviews run a rigorous 4-stage process, including a paid trial day working directly with the team.

Contact me (Sam Barcia) for more info on sam.barcia@wavetalent.co