Staff Engineer, Frontend - Primer

An Introduction to Primer

Primer is the unified infrastructure for global payments. We give finance and payments teams the visibility and control to reduce complexity, improve performance, and capture more revenue — all from a single platform.

Backed by Sofina, Peak XV Partners, ICONIQ, Tencent, Accel, and Balderton, we're building the payments layer the world's best companies rely on.

Which team will you be joining?

The merchant experience is only as good as the platform behind it — and most of that experience is the interface itself.

The Account Experience team builds and owns the full platform merchants use to interact with Primer — from initial setup through to day-to-day operations, and increasingly through Primer AI Companion as a first-class interface. The team spans several connected areas: Primer Companion, Merchant Account Setup, Monitors, Workflows, Auditing, and the cross-cutting concerns that keep the whole merchant experience cohesive.

As Staff Engineer you'll set front-end technical direction across these areas, not within a single one. You'll work across 2-3 teams, partner with multiple stakeholders, and stay hands-on in the implementation that matters most. The team runs a 'you build it, you own it' model: engineers own their work from design through to production.

The stack includes TypeScript, React, and modern front-end tooling, sitting on top of services in Python, AWS, Kubernetes, and Terraform.

What will you be doing?

• Setting and driving front-end technical strategy across the Account Experience teams, from architecture and component-system decisions through to hands-on implementation where it counts
• Owning the architecture of a complex, data-dense merchant platform — the patterns, state management, and performance characteristics that hold up as the surface area grows
• Shaping how Primer AI Companion matures as a first-class merchant interface, including the front-end architecture that makes a conversational surface feel native to the platform
• Holding the experience coherent across Account Setup, Monitors, Workflows, and Auditing — building the shared component and design-system foundations that stop the areas drifting apart
• Leading engineers across teams without direct authority, through code, design reviews, and technical mentorship that raises the front-end bar around you
• Owning accessibility, performance budgets, and front-end observability as first-class concerns
• Partnering with Product and Design, and with backend engineers across teams, to shape decisions where front-end constraints or opportunities are material

What We're Looking For

• Demonstrable experience operating at staff or principal level: setting front-end technical direction across multiple teams
• Deep front-end engineering expertise with TypeScript and React, and a track record of architecting complex, long-lived web applications
• Real fluency in state management at scale, performance, accessibility, and component-system design
• The kind of judgment that earns trust fast among engineers and cross-functional partners
• Enough comfort across the stack to reason about the APIs and services your front-end depends on
• Strong written and verbal communication, including making complex technical decisions legible to non-technical stakeholders
• Experience in payments, fintech, or platform contexts is welcome

A typical interview process

• An initial intro call with a Talent Partner
• An interview with the Hiring Manager
• Challenge Stage - Contextualised to the role
• A final, values-alignment interview

Our benefits

• Fully remote and globally distributed team since day one
• Competitive share options
• Uncapped holiday, with 25 days minimum to be taken
• Co-working space access across major cities
• Workations and annual company retreat
• The best equipment for your role
• £500 towards your home office setup
• Generous learning budget
• Private Medical Insurance and additional perks