Senior Frontend Engineer (Kotlin) - Frontend Core

Department: Engineering

Location: Berlin, Romania, Poland, Sofia

Employment Type: FullTime

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

Are you ready to accelerate your career with us? We'd love to hear from you!

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