Senior Product Engineer (Backend) - Investments Team

Senior Product Engineer (Backend) - Investments Team About Kota Kota is making insurance and retirement benefits as accessible as modern software. We do this across the Kota Platform - the world’s first fully integrated benefits platform and Kota Embed, our embedded insurance and retirement product for platforms. Our mission is to make insurance and benefits more accessible and delightful to this generation of employees. Today, we power benefits for hundreds of companies and thousands of employees from some of the most exciting and progressive employers in Europe, like Carwow, Tines, Zoe, Remote, and many more. Kota was started in 2022 and has raised €20m from Europe’s top technology investors, including Eurazeo, EQT Ventures, Northzone, Frontline, and angels, including Job Van Der Voort of Remote, Romain Huet, formerly of Stripe, now Open AI, and David Clarke, formerly of Workday. The companies our investors have previously backed or built include Spotify, Airbnb, Klarna, Truelayer, Snapchat, Workday, Personio, Workvivo, Pointy, Workable, Wayflyer, and more. The Role & Team We're looking for a Senior Product Engineer (Backend) to join the Investments team — the stream building the infrastructure that powers workplace pensions and retirement savings at Kota. This isn't just backend plumbing. You'll be designing the products that connect pension providers to employers and employees at scale, handling contributions, fund data, payroll integrations, compliance logic, and provider onboarding across multiple markets. It's technically challenging and a space where good product design genuinely changes outcomes for thousands of people. We're looking for someone with the ability to contribute to the product from start to finish. From initial product design with the rest of the team, architecture and API design, and validating that what we build solves real problems for our customers. The role requires someone who moves fast and ships but also thinks carefully about reliability and correctness because in financial services being precise matters. What You'll Do - Design and build the backend systems that power Kota's pension and retirement savings products including contribution flows, onboarding flows, provider integrations and employer-facing configuration - Own technical architecture decisions for the Investments stream - Integrate with external pension and savings providers, building robust, well-tested integrations that handle the messiness of real-world financial systems - Collaborate closely with the Product Lead, frontend engineers, and the broader integrations team to deliver features that work seamlessly end￾to-end - Continuously improve the stability and observability of the systems you own - Contribute to code reviews, technical planning, and a culture of high standards without bureaucracy - Help shape how the Investments team works. This is a senior role and we'll look to you for technical leadership as the team grows What We're Looking For - 6+ years building backend systems in production. We use .NET 8, PostgreSQL and Azure - Experience designing and maintaining integrations with third-party APIs - Strong understanding of data modelling, event-driven patterns, and building for correctness and auditability - Cloud experience with Azure or AWS. You're comfortable owning infrastructure, not just code - You think carefully about reliability, security, and compliance - You thrive at designing the product as a whole, not just the backend APIS. We need someone that will take the initiative and make product decisions - Comfortable with ambiguity and ownership in a fast-growing startup - AI-forward mindset - We are constantly evolving how we how we use AI to build products and improve our systems and engineering practices. You should lean into that, be actively curious about it and want to help push it further Why Join Us? - Technically interesting problem — pension infrastructure is genuinely complex: mul ... (truncated, view full listing at source)