Tech Lead Solution Architect

Tech Lead Solution Architect (Senior) - RVA ONEM

Dates: —

Arrangements: Full time; hybrid. No onsite frequency specified.

ONEM-RVA is seeking a Senior Tech Lead Solution Architect for its transversal architecture team. The assignment combines technical leadership with attention to business and operational needs. The architect will define reference architectures and oversee their evolution. Development-team coaching and skills development form part of the mission.

The technical landscape includes Java, TypeScript, Angular, Spring Boot and container technologies. Responsibilities cover service indicators, objectives and agreements, technical debt and technology evolution. The architect will support strategic projects and business requirements specification. Security and information-management regulations also fall within the scope.

The assignment runs from 23 November 2026 to 31 December 2027 on a full-time hybrid basis in Brussels. Candidates need at least 15 years in Java development and its ecosystem, plus 10 years of successful Team Lead experience. Recent successful Spring backend migration architecture and complete project lifecycle management must be demonstrated. A CV and a sufficient response to the supplied Java exercise are required; social-security experience is strongly desired.

Top Reasons to Apply

Lead transversal architecture

Shape technology evolution

Drive Spring modernization

Develop engineering teams

Support public services

Responsibilities

Lead transversal architecture teams

Coach development teams and develop skills

Define reference architectures and evolution

Establish SLI/SLO/SLA, delivery strategies and monitoring

Oversee strategic projects

Support business requirements specification

Define and implement technology evolution and technical-debt strategy

Monitor and implement security and information-management regulations

Must Have

Java experience: 15 years

Operational business technology interest

Scrum/project management training

Team Lead: ten years

Recent Spring migration architecture

Nice to Have

Social-security domain knowledge

ONEM responsibility knowledge

Social-security experience: one year

Detailed Responsibilities and Skills

Additional Responsibilities

• Align architecture with operations
• Collaborate with infrastructure teams and external partners
• Collect procurement requirements and evaluate products
• Provide internal training modules
• Demonstrate proven leadership capabilities.
• Show strong interest in operational and business aspects as well as technology.
• Hold a bachelor degree with a computing focus.
• Have completed at least Scrum Master training and/or ICT IT project-management training; a professional certification is not explicitly required.
• Have Solution Architect experience; portal lists Expert Application Architect with most recent experience at any time.
• Prove successful Team Lead experience of 10 years. This is a Team Lead threshold, not a stated 10-year Solution Architect threshold.
• Demonstrate management of the complete lifecycle of that migration project.
• Agile methodologies. Expert level and recency at any time are specified in the portal for Agile, Coaching and leadership & Team Management.
• Individual/team coaching. Expert level and recency at any time are specified in the portal for Agile, Coaching and leadership & Team Management.
• Needs analysis. Expert level and recency at any time are specified in the portal for Agile, Coaching and leadership & Team Management.
• Out-of-the-box thinking. Expert level and recency at any time are specified in the portal for Agile, Coaching and leadership & Team Management.
• Leadership/team management. Expert level and recency at any time are specified in the portal for Agile, Coaching and leadership & Team Management.
• Active knowledge of English.
• Active knowledge of French.
• Submit a CV in addition to a response to the exercise.
• Knowledge of social-security specificities is a major advantage.
• Knowledge particularly of ONEM responsibilities is a major advantage.
• At least one year of successful experience in a social-security institution is very strongly desired, not stated as mandatory.

Technical skills

• At least 15 years of experience in development and the Java ecosystem.
• Demonstrate recent successful implementation of an architecture for migrating a backend system to a modern Spring technology stack.
• Expert-level Java competency. Portal recency: any time. Angular is mis