Senior Frontend Engineer (Kotlin) - Frontend Core at Trading212 (Berlin, Germany)Senior Frontend Engineer (Kotlin) - Frontend Core

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.

• 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

• 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

• 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

• 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!