Engineer II, Frontend - Protection

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. Watch our showcase > Read up on our $100m Series C Learn more about our culture > Which team will you be joining? We play a key role in helping merchants handle disputes and prevent fraud. The Protection team owns the risk management suite that surfaces these threats, and helps merchants build automation to handle them at scale. What will you be doing? Build the dispute dashboard from scratch - deadline visibility, evidence status, response tracking Ship features end-to-end, with support from more senior engineers on scoping and architecture, across a lifecycle merchants are actively asking for Turn fraud vendor comparisons (Riskified, Forter, Signifyd, Sift) into something merchants can actually see and act on, not just a backend integration Own well-defined pieces of the native rules engine UI - surfacing velocity rules, blocklists, and fingerprinting signals in a way non-technical merchant teams can actually use Deploy your own work to production and monitor its impact, with more experienced engineers close by when you need them Work directly with Product and your EM on a small team where your features are visible What we're looking for Experience shipping production ready frontend features, with growing autonomy and less need for hand-holding on the basics Solid grasp of API design fundamentals and how to build for performance as usage grows Comfortable writing tests and thinking through edge cases and error handling Genuine care about the details of what you ship Nice to have, not required Exposure to fraud, risk, disputes, or another operationally sensitive domain Experience building dashboards or admin tooling from a blank slate Comfortable working with APIs Willingness to contribute to our Python backend when needed What you should know This team is new enough that some structure - on-call rotas, tooling, conventions, you'll be building it alongside doing the actual work Real ambiguity in the early days: you will be the one deciding what "good" looks like before anyone else has an opinion A handful of people today, so your individual output is highly visible ✅ 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 What's the culture like at Primer? We're building a culture where people can do their best work and be proud of the impact they have. You'll be working with people who are mission-driven, smart, and reflective, and who are genuinely invested in building exceptional products and delivering success for our merchants. We work remotely, and have done since day one. We believe that building a successful, profitable company goes beyond proximity. We invest in our relationships through great remote working practices and thoughtfully designed face-to-face time, including workations, our annual company retreat, and access to co-working spaces across most major cities. The work is challenging. Scaleups are a challenge, and building category-defining products is a challenge. But there's a meaningful difference between a challenge and a struggle. At Primer, the right challenge comes with the right support: strong onboarding, a collaborative environment, and a team that is genuinely invested in your success. It's never something you face alone. Our benefits 🌍 We are fully remote and globally distributed; and have been since day one 💰 Competitive share options 🌴 Uncapped holiday, with 25 days minimum to be taken 🗣️ Co-working space access across major cities 📅 Workations & Company Retreat 💻 The best equipment for your role 🏠 £500 towards your home office setup 🔎 Generous learning budget 🏥 Private Medical Insurance 📈 A broad set of additional perks and benefits ( depending on location) Don’t meet every single requirement? At Primer, we're dedicated to building a diverse, inclusive, and authentic workplace. If you're excited about this role but your experience doesn't align perfectly with every qualification listed, we encourage you to apply. You may be the right candidate for this or other roles. Primer is committed to the equal treatment of all current and prospective employees and adopts a zero-tolerance approach to discrimination, regardless of age, disability, sex, sexual orientation, pregnancy and maternity, race or ethnicity, religion or belief, gender identity, marriage and civil partnership, or any other background or belief.