# Senior Frontend Engineer \(Kotlin\) - Frontend Core - Company: [Trading212]() - Location: Berlin · Romania · Poland · Sofia - Remote: Yes - Team: Engineering - Employment type: Full Time - Posted: September 9, 2026 ## Job description ***Our mission is to enable everyone to build wealth*** *We reinvent how trading and investing work by creating exceptional products people love.* *Fostering a culture of excellence and high velocity is the key to our success.* *Today, we serve over 5 million clients, with more than €30 billion in assets under management - a testament to the scale and trust we’ve built in just a few years.* ## ## **What you’ll do** * Own and evolve our monorepo, ensuring it stays healthy, performant, and easy to work in as the codebase grows * Design, build, and maintain CI/CD pipelines for React Native and web targets, driving reliability and fast feedback loops for the engineering team * Author and maintain shared TypeScript libraries — state management patterns, networking layers, error handling utilities — consumed across all frontend products * Own the mobile release process end-to-end, including Android build configuration, versioning, and deployment automation * Integrate and maintain observability tooling (Sentry, Amplitude) at the platform level, so product teams get reliable instrumentation out of the box * Identify and resolve build bottlenecks, dependency issues, and tooling gaps that slow down engineering velocity * Collaborate closely with product frontend teams to understand their pain points and translate them into platform improvements ## **What you need to have** * At least 4 years of professional experience in frontend or mobile engineering, with a meaningful portion spent on platform, infrastructure, or developer tooling work * Production-grade TypeScript - strong typing discipline, not just familiarity * Hands-on React Native experience in a production app, including an understanding of the native layer * Practical Kotlin experience on Android - native modules, build configuration, or Android-side CI/CD work * Direct involvement in CI/CD pipeline ownership or significant contribution — mobile or frontend, any tooling * Ability to think in systems and write code for other engineers, not just end users * Comfortable working autonomously and making decisions without waiting for full consensus ## **Nice to have (Optional)** * Hands-on experience with nx or pnpm workspaces specifically * Familiarity with Vite and Expo for tooling or build configuration * Exposure to Reanimated or React Native Gesture Handler * Background in fintech or a high-scale consumer app where release reliability was business-critical ## **What we offer** * Challenges that will help you grow and realise your potential * Opportunity to make a big Impact - you will build innovative services used by millions of investors to build wealth * Work with smart, spirited, helpful, high-performing colleagues with a common goal * An environment where nothing is set in stone * Appreciation for your talent and ideas * Generous remuneration package including annual bonuses * Excellent social benefits package, including private health insurance, sports card and 25 days of paid vacation per year * Delicious treats and a spacious game room Bring your ambition to Europe’s fastest-growing mobile broker! ## Apply [Apply on Trading212]() Canonical job page: