Tech Lead / Senior Java Developer Consultant – Talent Pool

Java remains a core technology for many of our clients' back-end systems. We are building a pool of senior Java developers and Tech Leads we can propose quickly for development and modernisation missions. By joining, you will be among the first profiles we contact when a matching mission opens – as soon as a matching client request comes in.

Keystone Solutions is a Brussels-based IT consultancy and recruitment company – Bridging Technology & Talent. Organised in five practices (Management Consulting, IT Analysis, IT Development, IT Security and IT Infrastructure), we place experienced IT professionals on missions with leading organisations in Belgium, mainly in banking & insurance, federal and regional public institutions, utilities and industry.

• Back-end development of business-critical applications
• Microservices and API development
• Modernisation of legacy applications
• Agile teams with DevOps and containerisation practices

• →Design and develop back-end services with Java and Spring Boot
• →Build and expose REST APIs and microservices
• →As Tech Lead: guide technical choices, code reviews and team coaching
• →Contribute to CI/CD, containerisation and quality practices
• →Collaborate with architects, analysts and front-end developers (Angular/React)

• Minimum 5 years of Java development experience, including Spring / Spring Boot
• Strong SQL and relational database skills
• Experience with REST APIs and microservices
• Experience in Agile (Scrum) teams

• Docker / Kubernetes; Kafka or other messaging
• Front-end knowledge (Angular or React)
• Previous Tech Lead experience
• Cloud experience (Azure, AWS or on-prem OpenShift)

• Most of our clients operate in a bilingual environment: French and/or Dutch is required for the majority of missions, with a strong preference for bilingual FR/NL profiles
• Professional English is expected in most IT environments

Missions are typically medium to long term, full-time or part-time, on site or hybrid (usually 2–3 days on site). Depending on your preference, we work with you as a Keystone Solutions employee or as a freelance/subcontractor.

• Intake call with one of our recruiters to understand your expertise, preferred environments, languages and availability
• Keystone CV: we prepare with you a client-ready CV highlighting your most relevant experience
• Fast matching: when a client publishes a matching request, we contact you first and can submit your profile quickly – often before the market
• Transparency: we never submit your profile without your explicit consent for each mission
• Regular check-ins to keep your availability and preferences up to date