Frontend Developer

An Introduction to Primer

We’re the world's first unified payment infrastructure, empowering businesses worldwide to unlock their payment potential. By choosing our platform, merchants can take control of their payment stack, create unique commerce experiences, accelerate their roadmap, and increase payment success.

We strive to make something complex incredibly simple and intuitive. The world's top investors—including Accel, Balderton, Iconiq, and Tencent—have backed Primer’s vision to rebuild payments and commerce from the ground up.

Join us in shaping the future of payments and commerce.

Note: Unfortunately, we are unable to offer sponsorship or relocation support for this role at this time.

Which Team Will You Be Joining?

You’ll be joining the Acceptance team—the engineering domain responsible for the foundation of Primer's payment platform.

Acceptance processes 10 million transactions per day across providers, markets, and payment methods. The team owns everything from core payment infrastructure to merchant-facing APIs, SDKs, and checkout experiences.

Frontend engineering in this team means building surfaces that real merchants ship to their customers—composable checkout components, developer tooling, and UI layers that make a complex payments platform usable. The quality bar is high because the stakes are real.

You’ll report to an Engineering Manager and collaborate closely with backend engineers, product, and design in a team that values end-to-end ownership.

What Will You Be Doing?

• Own frontend projects end-to-end—from scoping through to production—across payment surfaces, checkout components, and merchant-facing tooling
• Lead architectural decisions, contributing to design sessions and producing RFCs and ADRs
• Build composable, performant, and adaptable UI for configurable payment experiences
• Monitor production impact using metrics and dashboards, and take ownership of issues
• Maintain a high quality bar for code and raise concerns when standards aren’t met
• Contribute to incident response, driving resolution and keeping stakeholders informed
• Share knowledge and help elevate the quality of the wider engineering team

What We’re Looking For

• Strong frontend engineering experience, delivering production-grade work end-to-end
• Extensive experience with TypeScript (experience with Web Components is a plus)
• Comfortable owning projects from scoping through to delivery
• Strong understanding of building accessible, performant, and scalable UI
• Ability to contribute to architecture discussions and clearly articulate trade-offs
• Writes clean, well-tested, high-quality code consistently
• Understands user and business context—not just technical requirements
• Clear and direct communicator, comfortable in async-first environments

Nice to Have

• Experience building SDKs, embeddable components, or developer-facing tooling
• Familiarity with payments, checkout flows, or high-availability frontend systems

You May Not Enjoy This Role If

• You prefer working in an office—Primer is remote-first
• You’re uncomfortable with ambiguity and shifting priorities
• You don’t enjoy testing your code (we don’t have dedicated QA)

Interview Process

• 30-minute call with a Talent Partner
• 60-minute interview with an Engineering Manager
• 90-minute coding interview
• 90-minute system design interview
• 60-minute final values interview

What’s Life Like at Primer?

We’ve been recognised as a top global employer and #1 in FinTech for flexibility.

We’re building a culture where people can do their best work and feel proud of the impact they make. You’ll work with a team that is mission-driven, thoughtful, and committed to building exceptional products for our merchants.

We’re fully remote and invest in strong working practices and meaningful in-person time through workstations, company retreats, and co-working access worldwide.

The work is challenging—building category-defining products always is—but you’ll be supported by a collaborative environment and a strong team. It’s a challenge you won’t face alone.

Benefits

• 🌍 Fully remote and globally distributed
• 💰 Competitive salary + share options
• 🌴 Uncapped holiday (minimum 25 days)
• 🗣️ Co-working space access
• 📅 Workations & company retreats
• 💻 Top-tier equipment
• 🏠 £500 home office setup budget
• 🔎 Generous learning budget
• 🏥 Private medical insurance
• 📈 Additional perks depending on location

Equal Opportunity

At Primer, we’re committed to building a diverse, inclusive, and authentic workplace. If you’re excited about this role but don’t meet every requirement, we encourage you to apply—you may still be the right fit.

We are committed to equal treatment for all employees and candidates and maintain a zero-tolerance approach to discrimination, regardless of age, disability, sex, sexual orientation, pregnancy and maternity, race or ethnicity, religion or belief, gender identity, or marital status.