(Senior/Staff) Backend Engineer

At Duna, we see the company as the second product we’re building and are continually working to create a transparent, ambitious culture. We want this to be the place where you do your best work. Our mission is to redefine identity for the global economy. We’re backed by world-class investors including Index Ventures as well as founders and executives from companies like Stripe, Adyen, Notion, Remote, Qonto, Framer, Anthropic, Mollie, OpenAI, Goldman Sachs. SINCE YOUR ROLE WITH US WILL RARELY FIT A JOB DESCRIPTION, WE ONLY WROTE A CRISP OVERVIEW. WHAT YOU'LL BE DOING IN THIS ROLE • Design and build backend systems that are clean, testable, and efficient • Architect scalable APIs and infrastructure for high-trust environments • Own core systems end to end, and stay hands-on in the code • Bring strong opinions on testing, quality, and long-term maintainability • Tackle complex product challenges with a user-first mindset • Shape our engineering practices and technical culture WHAT WE'RE LOOKING FOR • Senior or staff-level experience building and owning production systems • Systems thinking - you see beyond features to long-term system behaviour • Clear communicator who enjoys breaking down complexity and collaborating deeply • Appetite for learning and working in ambiguity • Curiosity • Big ambitions • Kindness Bonus if you've built AI features and the evaluations behind them, or worked on product analytics. Our current stack includes Node.js + TypeScript, Event Sourcing, Express, Postgres, RabbitMQ, Kubernetes, AWS. Experience with these is a plus, but not required. We are more excited about how you approach problems and find solutions. A final note before you apply: please read through our website in detail. You'll find the fundamentals there: what we believe in, how we work, and why we're building this company. We're a remote-first, fast-moving team of builders looking for exceptional people who love to create, build, and ship. Beyond passion and grit, we highly value curiosity, authenticity and kindness. If this sounds like you, we'd love to hear from you! PS. We are looking to hire passionate people from a variety of backgrounds. So even if you don't check all the boxes, we welcome your application!