Job Title: Senior Backend Engineer

Department: Product Engineering

Basis: Full-time, permanent

Location: Canary Wharf, London - WeWork

Reporting to: Director of Product Engineering

About the role

We're looking for a Senior Backend Engineer to design and own the systems that power our product. You will take end-to-end ownership of features with particular depth in APIs, data flows, and backend architecture, while remaining full-stack — comfortable shipping the frontend work needed to see a feature through without handing off. You'll take operational responsibility for what you build, help shape the team's technical direction, and mentor others as you go.

Want to dig deeper?

• Our Product Engineering Culture – by Luca Carangella, Director of Product Engineering, on how we think about engineering and collaboration.
• Building Products for Subcontractors – by our Co-Founders, Lewis and Greg, outlining the mindset and manifesto that guide how we build.

What you’ll do

• Own end-to-end delivery of features that solve real product problems, with particular depth in the application logic and database layers, through to shipped functionality across the stack
• Design and implement complex data flows, API integrations, and background processing systems that handle high-volume operations reliably while maintaining system performance and data integrity
• Take operational responsibility for what you build — from architecture and implementation through to how it behaves in production
• Build performant, well-tested backend services, while staying hands-on with the frontend so you can take a feature all the way through without handing off — avoiding a backend-only silo
• Use product metrics, engineering signals, and feedback from your team to inform technical decisions, prioritise improvements, and validate that shipped features deliver measurable value
• Partner with product and design to shape solutions early, translating requirements into technical architecture and surfacing risks and opportunities that impact outcomes
• Mentor and coach other product engineers, raising the bar for technical excellence