Architecting (both greenfield & existing systems), team leading (up to 8 people) and development/integration of complex systems. 5y+ Software Architect of various types of systems7y+ Team Leader, including estimation, defining project milestones, task management, code reviews, participation in acceptance tests10y+ Java developer, system integration & L3 operations (focus on backend, experience also with rich Front-end)1y+ GO Lang developer, microservices deployed with Docker+KubernetesSegments: Telco, Networking, Transport, Public, GasJozef's career bagan with information systems, then he specialized in system integration (defining integration interfaces & scenarios with third parties and leading an internal team). He designed and implemented several greenfield projects but also extended the functionality of existing systems in all project phases (including acceptance tests & maintenance in production). After several years of software development, he started designing parts of systems and became a team leader, later also participated in presales, estimation & defining project milestones. He has been the team leader and/or architect mainly on backend systems but also developed several rich web user interfaces (html+javascript UI on top of backend services). Last two years he spent in R&D related to SDN (Software Defined Network) solving cloud & data center use cases.