Senior Backend Engineer: Scale Infra, Open Source, Remote

Wave Talent Limited; Greater London; Remote; GBP 136,000 - 180,000; Full time

Job summary

Wave Talent Limited is partnering with a Series A developer infrastructure startup to hire a Senior / Staff Backend Engineer. The role focuses on building scalable, secure, open-source infrastructure handling vast workloads, with millions to billions of agent workflow executions monthly.

You will own large parts of the system, work directly with founders on architecture, and contribute to a public codebase open to the wider developer community.

Qualifications

• Experience building distributed systems at scale.
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• Strong reliability and infrastructure design knowledge.
• Comfortable owning large components with minimal guidance.
• Experience integrating AI tooling into development workflows.

Responsibilities

• Scale infrastructure to handle millions to billions of agent workflow executions monthly.
• Maintain reliability under extreme concurrency and load spikes.
• Build secure, isolated execution environments for user-submitted code (Firecracker micro-VMs).
• Manage server lifecycle and adapt capacity to shifting load.
• Develop observability and reliability tooling across the stack.

Skills

Distributed systems

Backend engineering

Scale-focused

Open source

AI tooling

Tools

Kubernetes

Firecracker micro-VMs

TypeScript

Job description

Wave Talent Limited is partnering with a Series A developer infrastructure startup to hire a Senior / Staff Backend Engineer. The role focuses on building scalable, secure, open-source infrastructure handling vast workloads, with millions to billions of agent workflow executions monthly.

You will own large parts of the system, work directly with founders on architecture, and contribute to a public codebase open to the wider developer community.