Trading212

Senior Frontend Engineer

Germany full-time Mid Salary not listed
full-time Mid level Technology & IT Curated
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About the role

Our mission is to enable everyone to build wealth
We reinvent how trading and investing work by creating exceptional products people love.
That takes high standards, high velocity and engineers who own what they ship.
Today, we serve over 6 million clients, with more than €38 billion in assets under management. At that scale, frontend performance, correctness and clarity are part of the product.
Our frontend platform spans web and mobile: TypeScript, React, React Native and React Native Web in an Nx and pnpm monorepo, with TanStack Query, Zustand, Playwright, Detox and Jest. Around 95% of our code is reused across web and mobile.
About the role
Senior Frontend Engineers work across our product domains. Your team match will reflect your strengths, interests and where you can contribute most.
Across every team, the model is the same: small, autonomous groups, a weekly release cycle and ownership from problem definition through production.
What you’ll do
Own complex frontend features end to end across web and mobile.

Design and evolve React and React Native systems, shared libraries and durable abstractions.

Identify and resolve rendering, state-management, bundle and runtime-performance bottlenecks.

Use TypeScript to make behaviour explicit and prevent defects rather than suppressing type errors.

Work closely with product, backend engineering and QA to turn complex requirements into simple user experiences.

Keep quality high through code review, unit, end-to-end and visual-regression testing.

Share knowledge, mentor colleagues and raise the frontend engineering standard.

What you need to have
Proven ownership of production frontend systems built with React or React Native and TypeScript.

Strong knowledge of React rendering, component boundaries, data flow and state management.

A track record of designing maintainable frontend architecture and reusable abstractions.

Practical experience diagnosing performance problems in complex web or mobile products.

Sound testing judgement across unit, end-to-end and visual-regression coverage.

Clear, structured problem-solving and the ability to explain technical decisions and trade-offs.

Strong engineering fundamentals, product judgement and confidence learning unfamiliar technologies.

Depth in one frontend ecosystem and sound tool choice matter more than familiarity with every technology listed.
What to expect
Recruiter conversation

Code Review

Experience Deep Dive

Managerial interview

Your recruiter will explain each stage clearly and follow up after every conversation.

Bring your ambition to Europe’s fastest-growing mobile broker!
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Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Mid
Technology & IT Javascript Senior Frontend Engineer Technology Mid level

Likely questions

  1. Tell us about work you have done that is close to the Senior Frontend Engineer role.
  2. How would you approach your first 30 days at Trading212?
  3. Which of Javascript, Senior and Frontend have you used recently, and what did it help you achieve?
  4. Describe a time you solved a problem without waiting to be told exactly what to do.
  5. How do you handle busy days, changing priorities, or pressure at work?

Prepare before the call

  • A recent example that proves your experience with Javascript, Senior and Frontend.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the Senior Frontend Engineer role because I can bring practical experience in Javascript, Senior and Frontend, learn the team quickly, and contribute to the outcomes Trading212 needs from this hire.

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