Infrastructure Architect

h3Freelance Technical Infrastructure Architect, Web Hosting Web Security /h3h3About the role /h3pA leading European bank is looking for a freelance Technical Infrastructure Architect to join the Technical Design squad within its Agile Production Services tribe, working hybrid from Brussels. The tribe delivers and maintains critical infrastructure services for the bank, with a primary focus on web infrastructure and applications. Its work covers technical architecture, the industrialisation of web infrastructure and security assets, 24/7 production support, and the secure integration of web applications in line with group-wide standards. /ppYou will sit at the intersection of design and operations. You will write detailed technical designs for new and evolving workflows, lead deep-dive analysis of production incidents and performance bottlenecks, and turn business requirements into robust, future-proof solutions. /ph3Key responsibilities /h3ulliProvide Web Hosting and Web Security architectural expertise to projects, delivering artefacts that define and implement the right architecture choices. /liliDevelop and own Detailed Technical Design (DTD) documents for new or updated projects. This means expanding on high-level architecture documents from Enterprise Architecture and clarifying workflows, integration points and technical dependencies. /liliAnalyse end-to-end application flows to identify inefficiencies, bottlenecks and failure points, and build performance and scalability considerations into designs. /li /ulh3Incident performance analysis /h3ulliLead technical investigations into production incidents, using logs, traces and APM data to isolate root causes. /liliRun performance benchmarking and capacity planning for WebSphere and cloud (IaaS/PaaS) environments. /liliDocument findings and recommend architectural improvements to prevent recurrence. /liliReview and validate designs with project architects, infrastructure engineers and development teams, acting as subject-matter expert for technical queries. /liliContribute to reference architectures for web infrastructure. /liliShare best practice on performance tuning, flow optimisation and incident troubleshooting. /liliWork closely with Security, Network and DevOps to deliver an end-to-end view of solutions. /liliProactively monitor application performance and flow health, identifying risks before they affect operations. /liliIdentify cost savings, such as right-sizing and licence optimisation. /liliAssess legacy and redundant components for decommissioning and drive their retirement. /li /ulh3What you'll bring /h3ulli5+ years of infrastructure architecture experience in enterprise environments. /liliBroad knowledge of web application hosting: WebSphere, Kubernetes, Tomcat, IIS, HTTP servers. /liliBroad knowledge of web security: ISVA, F5 WAF, API gateways, HSM, OAuth2, TLS. /liliExperience in cloud environments. /liliSolid technical depth in at least two of the areas above. /liliAbility to understand banking business processes and assess business impact. /liliExperience working in Agile delivery. /liliFluent English. French and/or Dutch is a strong plus. /liliMaster's degree or equivalent experience. TOGAF, ITIL or Agile certifications are an asset. /liliAble to work hybrid from Brussels, full-time (40 hours per week). /li /ulh3You are /h3ulliAnalytical, with strong synthesis skills. /liliA clear communicator in writing and speech who can influence stakeholders. /liliProactive and autonomous, and comfortable working alone or in a team. /liliRisk-aware and customer-oriented. /liliAt ease in a fast-paced, multicultural environment with demanding project schedules. /li /ul