Senior Frontend Developer

Haystack

Köln, DEonsitePosted Jun 12, 2026
Posting intelligenceActively listed

Skills

typescriptreact

About the role

We're working with an innovative tech company that is revolutionizing process and knowledge automation in the tax consulting sector. Their mission is to radically simplify highly complex, manual processes using modern software, automation, and AI.

The Role

Develop and optimize web and mobile applications using React and React Native

Technically conceptualize and implement new features, focusing on performance, maintainability, and user experience

Actively shape frontend architecture, design systems, and best practices

Collaborate closely with backend, product, and design teams

Ensure code quality through reviews, testing, and adherence to standards

Identify and resolve complex technical challenges

What You'll Need

Several years of experience as a Frontend Developer, ideally in a SaaS or product environment

Excellent proficiency in TypeScript and React (Hooks, State-Management, Performance)

Experience with React Native or a strong interest in mobile development

Understanding of modern frontend architectures and clean software patterns

Experience with API integration (REST / GraphQL is a plus)

Proactive, structured work approach and high-quality standards

C1 German language skills and very good English skills

What's On Offer

Real responsibility and creative freedom

An experienced, focused team with flat hierarchies and quick decision-making

Work on a product with clear market fit and genuine customer value

Flexible remote work within Germany combined with regular team events

Apply via Haystack today!

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