Staff Engineer, Frontend

Primer Technologies, Inc.

Job Overview

Location

United Kingdom

Job Type

Full-time

Full Job Description

📋 Description

• 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.
• 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.
• You'll be responsible for 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.
• You'll own the architecture of a complex, data-dense merchant platform — the patterns, state management, and performance characteristics that hold up as the surface area grows.
• You'll shape 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.
• You'll hold the experience coherent across Account Setup, Monitors, Workflows, and Auditing — building the shared component and design-system foundations that stop the areas drifting apart.
• You'll lead engineers across teams without direct authority, through code, design reviews, and technical mentorship that raises the front-end bar around you.
• You'll own the things that are easy to neglect: accessibility, performance budgets, and front-end observability as first-class concerns, not afterthoughts.
• You'll partner with Product and Design, and with backend engineers across teams, to shape decisions where front-end constraints or opportunities are material.
• Demonstrable experience operating at staff or principal level: setting front-end technical direction across multiple teams, not just within one.
• Deep front-end engineering expertise with TypeScript and React, and a track record of architecting complex, long-lived web applications.
• Real fluency in the things that separate good front-end from great: state management at scale, performance, accessibility, and component-system design.
• The kind of judgment that earns trust fast — engineers follow your technical lead because you're right, not because of your title.
• Enough comfort across the stack to reason about the APIs and services your front-end depends on, and to partner with backend engineers as an equal.
• Strong written and verbal communication, including making complex technical decisions legible to Product, Design, and non-technical stakeholders.
• Comfort working in payments, fintech, or platform contexts is welcome, though depth of engineering matters more than the specific industry.
• You prefer a defined lane — at Staff level you'll be expected to find and shape the work across several teams, not wait for it to be handed to you.
• You think of front-end as the layer that just renders what the backend sends — here it's a first-class engineering discipline with real architectural weight.
• You want a QA team to catch your bugs — we don't have one, and we don't plan to.
• Remote-first feels like a compromise to you — for us it's deliberate, and it demands real discipline and strong async habits.

🏖️ Benefits

• A TYPICAL INTERVIEW PROCESS
• WHAT'S THE CULTURE LIKE AT PRIMER?
• OUR BENEFITS
• DON’T MEET EVERY SINGLE REQUIREMENT?

Skills & Technologies

Python

TypeScript

React

AWS

Kubernetes

Frontend

Senior

Remote

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Primer Technologies, Inc.

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About Primer Technologies, Inc.

Primer Technologies is a San Francisco–based fintech infrastructure firm that provides a unified payments platform for online merchants. It offers low-code integrations with global processors, fraud tools, analytics, and checkout orchestration through a single API. The company helps e-commerce businesses add, optimize, and route payments across providers without custom backend work, improving authorization rates and reducing development time. Founded in 2020, Primer serves mid-market to enterprise retailers across Europe, North America, and Asia.

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