Senior Software Development Engineer (App Platform)

O projekcie: At Remitly, we believe everyone deserves the freedom to access, move, and manage their money wherever life takes them. Since 2011, we've tirelessly delivered on our promise to customers sending money globally, providing secure, simple, and reliable ways to manage their money, ensuring true peace of mind. Whether it's supporting loved ones back home, growing a business across continents, or pursuing new opportunities abroad, we're not just here to move money— we're here to move our global customers forward. We're looking for builders, reimaginers, and global thinkers who want to work at the intersection of technology, trust, and transformation. If that's you and you're ready to do the most meaningful work of your career—we invite you to join over 2,800 passionate Remitlians worldwide who are united by our vision to transform lives with trusted financial services that transcend borders. About the Role: App Platform Engineering builds and maintains the foundational mobile and web platform that all Remitly product teams build on top of. We own the architecture, shared frameworks, build and release infrastructure, design system, and developer tooling. These let product teams ship faster and with higher quality. This also eliminate the need for product teams to solve the same hard problems twice. As a senior development engineer you will report to senior engineering manager in Krakow and work with peer team in U.S. Wymagania: - BS in Computer Science or equivalent experience, with 8+ years building products at scale. - Proficiency in TypeScript (preferred) and at least one of Go, Java, or Kotlin. PHP familiarity is a bonus. - Experience building platforms from the ground up — frameworks, shared tooling, quality gates, and CI/CD pipelines. You think in systems, not features. - Deep React Native knowledge: performance constraints, native bridge, OS-level differences, and what breaks in production that never breaks in the simulator. - Hands-on experience owning the full mobile and web release lifecycle — from pipeline design to safe app store delivery. - Experience designing the data layer between backend services and client apps — GraphQL, BFF patterns, or similar API contracts that keep frontends decoupled. - Exposure to design systems at scale — building components that product teams actually adopt, balancing flexibility with consistency. - A track record of onboarding teams onto platforms you built — good docs, well-designed APIs, and making the right thing the easy thing. - Informed opinions across the full client app spectrum, from full native to PWA, with clear thinking on where each approach wins and where it breaks down. Codzienne zadania: - Own the architecture and evolution of our mobile (React Native) and web platform - decisions that 10+ product teams depend on - Build and maintain CI/CD pipelines, app store delivery, feature flagging, and safe rollout infrastructure - Design and maintain the API/middleware layer between backend services and client apps - Lead the shared component library and design system in partnership with UX - Take care of localisation engine - Set and enforce standards for performance, observability, and accessibility - Enable product teams through documentation, tooling, workshops, and architecture reviews - Keep the team current on AI-assisted development, React Native advances, and cross-platform patterns - Review cross-team contributions for consistency, performance, and maintainability - Ensure compliance with industry standards and regulatory requirements - Mentor junior engineers