Lead React Developer / Senior Fullstack Developer

Project overview

For an internationally active retail company, we are looking for an experienced Lead React Developer with a Fullstack background. This role is hands-on: you will make technical decisions, actively support the development team, and write productive code yourself.

Responsibilities

• Leading React development and controlling application architecture
• Implementation of frontend features, backend services, and integrations
• Establishing coding standards, conducting code reviews, and supporting developers
• Ensuring pragmatic, maintainable, and testable solutions

Requirements

• Sound, current project experience with React and JavaScript/TypeScript in productive use
• Practical experience in software architecture, especially with interfaces between frontend and backend as well as API design
• Hands-on backend development with Node.js, API integration, databases, and authentication
• Experience in technical leadership and code reviews
• Practical experience with AI coding tools and their review and validation
• Fluent German (at least C1) for technical discussions and detailed requirements

Nice to have

Framework conditions:

• Node.js with TypeScript/JavaScript
• Experience with Kotlin in the backend
• Experience with BPMN workflow engines like Camunda
• Start: January 2027
• Duration: 12 months
• Full-time utilization
• Remote with occasional on-site appointments in Germany
• Project language: German

Project details

• Start: Januar 2027
• Duration: 12 Monate
• Remote: onsite
• Location: Karlsruhe, DE
• Languages: German