Senior Frontend Engineer

About the Position

Senior Frontend Engineer

We are looking for a Senior Frontend Engineer to join Trading212, Europe’s fastest-growing mobile broker. You will be instrumental in leading complex frontend features across web and mobile platforms using React and TypeScript.

Location

Bulgaria

Employment Type

Full time

Location Type

Hybrid

Department

Engineering

Our Mission

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.

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.

Responsibilities

• 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 behavior 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.

Requirements

• 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 judgment 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 judgment, and confidence learning unfamiliar technologies.

Depth in one frontend ecosystem and sound tool choice matter more than familiarity with every technology listed.

Nice to Have

• Experience with Nx, pnpm, TanStack Query, Zustand, Playwright, Detox, and Jest.

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.

We Offer

• Competitive salary
• Opportunity to work in a dynamic and innovative environment
• Professional growth and development opportunities

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

We thank all applicants, but only candidates selected for interview will be contacted. All personal data of applicants is protected by law and treated with strict confidentiality.