PpOur client, a leading organization in the railway infrastructure sector, is seeking an expert to manage mission‑critical applications for traffic planning and infrastructure management. This role focuses on driving technical excellence through full‑stack development and supporting the adoption of Large‑Scale Scrum within a complex, 24/7 environment. /p h3Responsibilities /h3 ul liTranslate functional requirements into robust technical solutions through detailed technical analysis. /li liImplement scalable and efficient backend solutions using modern development frameworks and architectural patterns. /li liMaintain and optimize mission‑critical applications while ensuring high availability through troubleshooting and bugfixing. /li liIntegrate automated testing into CI/CD pipelines to guarantee stable software delivery. /li liEnsure high code quality by adhering to bClean Code /b, bSOLID /b principles, and security best practices. /li liMentor junior and medior developers while contributing to the continuous knowledge development within the teams. /li liParticipate in a 24/7 on‑call rotation to support business‑critical operations. /li /ul h3Qualifications /h3 ul li10+ years backend development with bJava 21 /b, bSpring Framework /b, bHibernate /b, and bJPA /b. /li li10+ years experience in data and integration with bKafka /b, bSQL /b, bPostgreSQL /b, bMySQL /b, and bOracle /b. /li li10+ years experience with bClean Code /b principles and bTest Driven Development (TDD) /b. /li li10+ years DevOps and CI/CD experience using bGit /b, bJenkins /b, and bArtifactory /b. /li li5+ years architecture and design with bMicroservices /b, bDomain Driven Design (DDD) /b, and bHexagonal Architecture /b. /li li2+ years frontend development with bAngular 19+ /b. /li li2+ years experience with bLarge-Scale Scrum (LeSS) /b implementations. /li li2+ years with bWebSocket /b and bMiro /b. /li liYou possess strong analytical skills, initiative, and a proactive approach to coaching and mentoring teams. /li liYou are fluent in bEnglish /b with C1 proficiency in bFrench /b or bDutch /b. /li /ul h3Nice to Haves /h3 ul liWillingness to participate in a 24/7 on‑call support rotation. /li /ul h3Offer /h3 ul libStart date: /b 01/06/2026 /li libDuration: /b 5 years /li libWork regime: /b Full‑time /li libLocation: /b Brussels /li libWorking model: /b Hybrid /li libContract: /b open to both permanent employees and freelancers /li /ul /p #J-18808-Ljbffr