Senior Software Engineer, Backend

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 > 🔍 What will you be doing? Leading the design and implementation of core backend services for high performance, complex distributed systems Taking ownership of key technology decisions, building for scale and optimising for output Driving and using modern development practices such as BDD and TDD would be highly beneficial Creating clear, modern, well tested code Collaborating across teams in a product-driven environment Conducting code reviews and continuously look at ways of improving our ways of working Creating detailed internal documentation for the projects you work on 👀 What we’d love to see: In-depth understanding of the entire development process (design, development and deployment) Knowledge of building developer frameworks and workflows, allowing both customers and third-parties to integrate as seamlessly as possible Experience in Python is advantageous (it's what we use!) but we have had success hiring engineers of any technical background and understand that people can adapt Highly motivated self-starter who values autonomy and getting things done Excellent verbal and written communication skills Payments knowledge, always looking for ways to optimise our merchant developer experience You will need to be based in: Poland, Portugal, Hungary, Romania or South Africa. ✅ 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 co-working space access worldwide. 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 📅 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. Apply To This Job