Senior Frontend Developer

Joom

Senior Frontend Developer at Onfy, a German pharmacy marketplace. Focusing on frontend development and collaborating with a growing team using modern technologies.

Posted 5/13/2026full-timeBerlin • 🇩🇪 GermanySeniorWebsite

Tech Stack

Tools & technologies

AndroidiOSJavaScriptNext.jsReactReduxTypeScript

About the role

Key responsibilities & impact

Develop and evolve frontend architecture for user-facing product areas
Build reliable, scalable, and maintainable web interfaces
Design client-side integrations with backend services and APIs
Improve product flows across key user journeys
Participate in product discussions, feature design, and experiment launches
Work closely with product managers, designers, QA engineers, analysts, backend developers, and mobile developers
Maintain and improve code quality, performance, accessibility, and automated tests

Requirements

What you’ll need

Strong experience with frontend development using JavaScript and TypeScript
Solid experience with React and modern frontend architecture
Experience with Next.js, SSR, and SPA architecture
Experience working with REST APIs and client–server applications
Experience with state management and data-fetching tools such as Redux, Effector, or React Query
Ability to design maintainable architecture and make pragmatic technical decisions
Product-oriented engineering mindset: ability to understand user problems, think beyond implementation, and contribute to product decisions
Nice to have: Experience with iOS or android development
Interest in growing as a T-shaped engineer across web and mobile platforms
Professional use of AI coding tools such as Cursor, Claude Code, or similar
Ability to evaluate AI-assisted workflows: what worked, what did not, and why

Benefits

Comp & perks

Fully remote or hybrid format (Berlin or Lisbon office)
Permanent employment contract (Germany or Portugal) or Contract-based collaboration (full-time)
Transparent growth framework: we define growth expectations together and set goals that align with them

ATS Keywords

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Hard Skills & Tools

JavaScriptTypeScriptReactNext.jsSSRSPA architectureREST APIsReduxEffectorReact Query

Soft Skills

product-oriented engineering mindsetability to understand user problemspragmatic technical decisionscollaborationcommunication