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September 24, 2026
Frontend Developer (React Native)
Junior • On-site
35,000 - 60,000 EUR/yr
Hamburg, HH, Germany
Quick Facts
Role: Frontend Developer (React Native)
Platform: iOS and Android mobile app
Description
You will develop and continuously improve a live mobile finance app, working directly on features used daily by real users. The role focuses on implementing new functionality with React Native and TypeScript, translating designs and prototypes into high-quality interfaces, and integrating APIs and external data sources. You’ll collaborate closely with the CTO, founders, and the product team, using modern AI development workflows to deliver faster and with strong code quality.
Responsibilities
Develop new features using React Native and TypeScript
Continuously improve existing areas of the app
Implement designs and prototypes as polished, working interfaces
Build reusable components and UI structures
Integrate APIs and external data sources into the app
Work with large volumes of financial and market data
Optimize performance, load times, and app stability
Ensure responsive design across different device sizes
Analyze and independently fix bugs and issues
Contribute ideas for product, UX, and technical implementation
Support features from first idea through release
Collaborate closely with the CTO, founders, and the product team
Use modern AI tools to speed up development, understand codebases, find bugs, refactor, write tests, and prototype new solutions
Requirements
Very good knowledge of React or React Native
Confident use of TypeScript or JavaScript
Solid understanding of Mobile UX
Strong attention to detail and high-quality design
Independent problem solving
Willingness to take responsibility
Fast comprehension and openness to new technologies
Pragmatic, implementation-focused approach
High quality expectations for the product
Enjoy working in a fast startup environment
Cross-platform experience is a plus
Backend knowledge is a plus, especially C#, .NET / ASP.NET Core, APIs, SQL, databases, and cloud services
Experience with Claude Code is strongly preferred
Benefits
Success-based bonus
Company mobile phone
Flexible working hours
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