Tech Lead Solution Architect (Senior) - RVA ONEM

ADJUGO

Brussel Hoofdstad

Hybrid

EUR 110,000 - 160,000

Full time

3 days ago

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Job summary

ONEM-RVA in Brussels is seeking a Senior Tech Lead Solution Architect to drive transversal architecture and modernize backend stacks using Spring, Java, and related technologies. You will define reference architectures, oversee evolution, and coach engineering teams while aligning with business needs and security requirements.

Requirements include 15+ years in Java and 10+ years in Team Lead roles, plus recent Spring migration experience.

Qualifications

15 years in Java development and ecosystem.
Recent backend migration architecture using Spring.
Bachelor degree in computing or related field.
Fluent in English; French knowledge preferred.
10 years of Team Lead experience.
Knowledge of social-security domain is an advantage.

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 and migration initiatives
Support business requirements specification and technical-debt strategy implementation
Ensure adherence to security and information-management regulations

Skills

Java

TypeScript

Angular

Spring Boot

Docker/Kubernetes

OpenAPI/AsyncAPI

OpenTelemetry

Maven/Gradle

DDD

CI/CD pipelines

RabbitMQ

OAuth2/OIDC

Education

Bachelor degree in Computing

Tools

Spring (Boot)

Docker

Kubernetes

RabbitMQ

OpenAPI/AsyncAPI

OpenTelemetry

Maven/Gradle

Job description

Tech Lead Solution Architect (Senior) - RVA ONEM

Dates: 2026-11-23 — 2027-12-31

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 misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level TypeScript competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level Angular competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level DDD competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level CI/CD pipelines competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level Docker / Kubernetes competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level Spring (Boot) competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level RabbitMQ competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level OAuth2/OIDC competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level OpenAPI/AsyncAPI competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level OpenTelemetry competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level Maven/Gradle competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level TDD competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level Cypress competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level Hibernate competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC” in the portal skills list.
Expert-level C4/Archimate modeling competency. Portal recency: any time. Angular is misspelled “Angluar” and OAuth2/OIDC “OAauth2/OIDC\" in the portal skills list.
Provide a sufficient response to the supplied Java exercise; an absent or insufficient response is disqualifying. Preserve the source code as supplied; it contains apparent errors and must not be silently corrected.