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Senior Frontend Engineer React / Next.js (m/w/d)

Köln, NORDRHEIN_WESTFALEN💼 Full-time🗓 2026-07-08 → 2026-09-17

Core

Building and maintaining central customer journeys (login, account management, billing, payments) and self-service functions for a digital energy platform across web and mobile.

Role type

Senior Frontend Engineer (React/Next.js)

Builds

Web and mobile customer experience for energy billing and self-service

Domain

Energy / Utilities

Deliverable

product features

Required skills

React, Next.js, TypeScript, Component Architecture, Performance Optimization, Accessibility, API-first platforms, Authentication flows, CI/CD, AI-driven development workflows

Preferred skills

GraphQL, React Native, PWA, Flutter, White-label product development

Technologies

Next.js, React, TypeScript, Zod, GraphQL, React Native, Claude Code, Cursor, Windsurf

Responsibilities

Develop and improve customer experiences on a modern digital platform; Build and maintain central customer journeys; Ensure seamless cross-device functionality; Collaborate on mobile app experiences in React Native; Integrate frontend applications with API-driven backends; Apply schema-based type validation; Ensure performance, accessibility, and quality across browsers and devices; Contribute to frontend standards and CI/CD processes; Utilize AI agents for code generation and strategic reviewing.

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