Skill set (26)
Sebastiaan in a few words
As a seasoned System Architect and IT Business Analyst, I have over two decades of expertise in steering organisations through the intricacies of both operational and strategic business and IT solution development. My academic credentials, including a Bachelor's degree in Software Engineering and Business Informatics, coupled with a robust background in programming, provide me with a solid foundation that bridges the gap between business understanding and technological skills.
This unique blend of skills enables me to navigate effortlessly between high-level strategic discussions with board members and in-depth technical dialogues with developers. My experience spans a diverse array of functional areas, including business process management, enterprise application integration, and information analysis, as well as the design and development of information systems.
I am well-versed in a multitude of technologies, with a particular focus on SQL, Javascript, Python, AWS, Openshift, Oracle, and Java. My comprehensive technological knowledge ensures that I am equipped to tackle complex challenges and drive innovation within any organisation.
Experience
- BelastingdienstSystem ArchitectPUBLIC SECTORJanuary 2023 - Today (2 years and 6 months)Apeldoorn, Netherlands
- Spearheaded the digital transformation of the Dutch tax authority's legacy systems as Solution Architect, driving the adoption of the legacy on-premise Multi-channel Reception (MKO) platform to a hybrid cloud environment for efficient digital declaration processing.
- Championed the Scaled Agile Framework methodology, crafting enabler epics and collaborating on business epic creation to streamline the authority's digital services.
- As a System Architect, played a pivotal role in defining the architectural runway within an agile team, ensuring robust and scalable infrastructure.
- Authored enabler features with a focus on clarity and comprehensibility, effectively communicating technical requirements to diverse development teams.
- Served as liason among client, business analyst, architects and implementation teams to syncrhonize IT efforts with business objectives.
- Project solution architectur documented based on internal templates and Bizzdesign using ArchiMate modeling language.
- TLSCONTACTSolution Architect & Product OwnerDIGITAL & ITSeptember 2018 - August 2022 (3 years and 11 months)Lyon, France• Leading role in creating architectural solutions for multiple government VISA service projects, serving as a pivotal liaison between business objectives and technological implementation.• Utilized BPMN and UML to design and articulate system architectures to project boards.• Undertook a hybrid role as Solution Architect and Product Owner, driving both technical and management reporting aspects of a key U.S. Government project.• Designed a digital platform for U.S. travel authorization, integrating adaptable solutions for courier services and online/bank payment processes within an AWS Cloud and Redhat Openshift environment, leveraging microservices architecture.• Engineered a scalable, generic process for transaction reconciliation, compatible with various national online payment systems, ensuring compliance with task orders and regulations.• Developed a secure, cloud-based digital document delivery system for the UK VISA application process, incorporating country-specific data sovereignty requirements (DPA-2018 & GDPR).• Conducted the design of functional and technical solutions for a dynamic visa services environment, enhancing operational efficiency and digitization processes.• Collaborated with key internal (Finance, Operations, IT) and external (Government) stakeholders to innovate and streamline visa document handling, achieving significant cost reductions.• Achieved a 50% reduction in annual operational expenses (OPEX) and eliminated multi-million dollar capital expenditures (CAPEX) by transitioning from licensed external software to an open-source, internally developed solution.• Pioneered a new document digitization process for the Dutch Government, subsequently scaling the solution across multiple Schengen countries, reinforcing the shift to in-house software development.• Delivered a cloud-based technical architecture utilizing AWS, integrating seamlessly with the Dutch government's stack for optimal performance and reliability.
- StedinSenior Oracle Apex ConsultantENERGY & UTILITIESSeptember 2014 - July 2018 (3 years and 10 months)Rotterdam, NetherlandsAs a senior Oracle Apex Consultant I was responsible for in-house developed applications to support distribution network operator (DNO) operational processes.Within this team my role was focused on creating technical specifications and in collaboration with the business for (new) functional requirements. During this period the company was changing from a classical project approach towards Agile including Scaled Agile Framework (SAFe).As a lead developer I was participating in writing user stories.
5 recommendations
EZ
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Elizabeth Zasy and 4 other people have recommended Sebastiaan
06/11/2022
Sebastien is a great colleague that goes strait forward to problems & their solution, alaways with positivity. He is very adaptable & has a pragmatic mind. He welcomes new ways of working or new solutions without resistance & focus on the right issues or risks.
26/10/2022
I got to know Bastiaan as a seasoned specialist in Oracle APEX application development and business analyst. His knowledge of the product and the implementation have been decisive for the result of the project. He is a pleasant colleague to work with and he has the drive to bring projects to a successful end.
24/10/2022
Sebastiaan worked as Solutions Architect and Product owner for one of the most extensive programs to enable visa processing for one of our Government clients, which I was leading from Technology. Sebastiaan contributed extensively to this program by providing solutions to complex architecture. Sebastiaan also led the implementation team and acted as the bridge between the business and the development teams playing the dual role of Product Owner and solutions architect at times. I would certainly recommend Sebastiaan for technology leadership/solution architecture roles.
21/10/2022
Sebastiaan is a friendly, easy approachable and intelligent expert. His capability to listen what customers really need, and translate that back into innovative IT solutions is excellent. His positive energy is the key to many successful IT projects implementations we experienced ourself.
I strongly recommend Sebastiaan for any client/project in the role of Solution Architect, Designer/Analyst, Project lead and even on technology level. Feel free to reach out to me for additional info.
Ruben van der Zwan
CEO & Founder of Yenlo
I strongly recommend Sebastiaan for any client/project in the role of Solution Architect, Designer/Analyst, Project lead and even on technology level. Feel free to reach out to me for additional info.
Ruben van der Zwan
CEO & Founder of Yenlo
21/10/2022
I have worked with Sebastiaan for a number of years and on multiple projects and I attest that Sebastiaan is a trusted partner who has continuously supported me with great advice and guidance. I could always rely on him to deliver on time, to guide the team with clear and concise instructions and to maintain a solid knowledge base. An organization should be lucky to have Sebastiaan as a member of their team.
Education
- BIAmsterdam University of Applied Sciences2001BI