Staff Engineer – Developer Experience & Architecture

Our client, a leading organization in the transportation and infrastructure sector, is looking for a Senior Technical Mentor. This role focuses on enhancing developer experience and technical excellence across multiple product teams by providing architectural guidance and hands-on coaching. The mission involves driving modern development practices and high-quality software delivery standards within a large-scale agile framework.

• Improve automated build, test, and deployment processes in collaboration with product development teams.
• Expand automated testing coverage including E2E, contract-based, component, and unit testing.
• Coach development teams on implementing (A)TDD practices and test-first methodologies.
• Guide the transition from standard GitFlow habits toward a reliable Trunk Based Development approach.
• Provide mentorship on emergent architecture, Clean Architecture, and hexagonal microservices design.
• Apply and explain Clean Code principles such as SOLID, DRY, and KISS through real-world project work.
• Facilitate technical growth using methods like Mob programming, Software Teaming, and Learning Katas.

• 10+ years experience in software solution design and delivery with Domain Driven Design, TDD, and Trunk Based Development.
• 10+ years experience in testing and quality focusing on Contract Testing, Integration Testing, and Unit Testing.
• 10+ years working with GitLab source control and concurrent product development environments.
• 5+ years backend development with Java, specifically Java 21.
• 5+ years with Clean Architecture, Hexagonal Architecture, and Clean Code principles.
• 5+ years in technical leadership roles using Mob Programming, Ensemble, or Software Teaming.
• 5+ years managing transitions toward emergent design and rapid technical feedback cycles.
• 5+ years setting up test suites as executable documentation.
• You bring a strategic mindset with strong technical coaching, presentation, and initiative-taking skills.
• You are fluent in Dutch and French at a C1 level.

Nice to Haves

• Experience working within a Large Scale Scrum (LeSS) environment.
• Knowledge of Angular, PrimeNG, and Cypress.
• Familiarity with Kafka, RabbitMQ, OpenShift, or Kubernetes.
• Willingness to participate in a 24/7 on-call rotation.

• Start date: 02-05-2026
• Duration: 5 years
• Work regime: Full-time
• Location: Brussels
• Working model: Onsite
• Contract: open to both permanent employees and freelancers