Technical Business Analyst required for public sector client located in Brussels.br/ EU citizens only for the working location requirement.br/ Technical Business Analystbr/ Location: 2 days onsite 3 days remotebr/ Contract type: 6 months + extensions (long-term engagement)br/ Location: Brusselsbr/ Language: english french or dutchbr/ Brussels - 550 EUR / daybr/ br/ h2Key responsibilities /h2 br/ Technical functional analysis:br/ ul liTranslate complex business requirements into clear, actionable technical specifications. /li liCollaborate with Solution Architects to align project scope with the overall system architecture. /li liDefine and validate REST API specifications in accordance with Open API standards and Back End service design. /li liSupport database modeling efforts, ensuring alignment between data schema and business logic. /li /ul Project coordination Agile participation:br/ ul liActively contribute to Agile ceremonies including daily stand-ups, sprint planning, retrospectives, and backlog refinement. /li liLiaise with Project Managers and Service Owners to ensure timely delivery and alignment with strategic goals. /li liProvide impact analysis and feasibility assessments for new features, change requests, or enhancements. /li /ul Documentation quality assurance:br/ ul liCreate and maintain detailed functional and technical documentation (Jira, Confluence), including process flows, user stories, test cases, and /li lirelease notes. /li liSupport test planning by defining test scenarios and acceptance criteria. /li liCollaborate with QA teams to ensure thorough validation of application functionality. /li /ul Security compliance awareness:br/ ul liEnsure security best practices are Embedded in requirements (eg, secure access via OAuth2, JWT, LDAP, RBAC). /li liParticipate in the review of TLS life cycle and key management practices from a compliance and risk perspective. /li /ul Collaboration across teams:br/ ul liAct as the key liaison between development, QA, DevOps, and product teams to ensure end-to-end solution quality. /li liSupport front-end-back-end integration efforts by identifying, analysing, and resolving functional mismatches. /li liCoordinate with platform and observability teams to ensure appropriate logging, monitoring, and alerting (eg, ELK Stack, Zabbix). /li /ul br/ h2Required qualifications /h2 ul liMinimum 5 years' experience in a Technical Business Analyst or Functional Analyst role within complex Back End systems. /li liSolid understanding of RESTful architecture, MicroServices, and Back End service flows. /li liFamiliarity with Java/Spring Boot systems, with the ability to analyze logs and architecture at a high level. /li liProficiency with tools such as Jira, Confluence, GitLab, and Jenkins. /li liExperience working in Agile/Scrum teams in large-scale IT environments. /li liStrong analytical, communication, and stakeholder management skills. /li /ul Preferred qualifications:br/ ul liExperience with OpenAPI, API gateways, and enterprise-grade authentication methods. /li liUnderstanding of PostgreSQL or similar relational databases. /li liExposure to containerized environments (Docker, OpenShift). /li liPrior work with observability stacks such as ELK and Zabbix. /li liFamiliarity with Domain-Driven Design (DDD) and clean architecture principles. /li /ul