Full Stack Developer Java React Consultant
Keystone Solutions • Brussels, Brussels • Posted June 20, 2026
Position Overview
Mission Overview:
This is a consultancy mission at a client site, where you will represent Keystone Solutions as a Full Stack Developer (Java/React). As a Keystone Solutions consultant, you will be hired to work on client projects, bringing your expertise and our values to every engagement.
Key Responsibilities:
- Translate requirements into high quality code.
- Design, build, and maintain high performance, reusable, and reliable Java code based on Spring Framework.
- Collaborate with cross-functional teams to ship new features.
- Work with outside data sources and APIs.
- Ensure the best possible performance, quality, and responsiveness of the application.
- Unit-test code for robustness, including edge cases, usability, and general reliability.
- Identify and correct bottlenecks and fix bugs.
- Help maintain code quality, organization, and automatization.
Mi...