20+
Years Experience
100+
Projects Delivered
40+
Open Source Repos
Senior software engineer and tech lead with 20+ years of experience across SaaS, IoT, and enterprise systems. Founder of XIThing, a boutique software agency delivering freelance, contracting, and project-based work.
I help scale-ups and enterprise teams turn business needs into production-ready software, from architecture to delivery. I combine engineering depth, business sense, and hands-on leadership to unblock teams and ship systems that solve real problems.
Comfortable across stacks from Python and TypeScript to Kubernetes and cloud platforms (AWS, Scaleway). Focus areas include energy transition software, sustainable infrastructure, and open data/interoperability. Languages: Dutch, English, Spanish.
Services
Selected Highlights
- Current: Software Engineer & Tech Lead (Founder) at XIThing.
- Built smart lighting and device-management platforms integrating existing hardware.
- Developed energy services registries with REST and real-time integrations.
- Designed smart city device architectures using event-driven systems.
- Shipped cloud monitoring platforms for medical IoT devices.
- Designed ticketing APIs and led large-scale UX and platform redesigns.
Technical Focus
- Cloud-native backends with Python, TypeScript/Node.js, and Java.
- Kubernetes-first infrastructure on AWS and Scaleway.
- API design with REST, real-time integrations, and service interoperability.
Work Experience
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Jan 2016 - Present
Software Engineer & Tech Lead (Founder)
XIThing · Weert, Limburg, Netherlands · Remote
Founder and lead engineer helping companies translate business needs into scalable, production-ready software, from cloud-native platforms to complex distributed systems.
- Delivered end-to-end products and advised on software strategy, architecture, and execution.
- Built scalable IoT and device-management platforms.
- Designed cloud-native architectures and Kubernetes-based infrastructure.
- Led cloud and data migrations, including US to EU transitions.
- Developed simulation and optimization models for energy systems.
- Shipped web and mobile applications and provided technical consultancy.
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Jan 2015 - Mar 2016
Head of Tech
Paylogic International · Netherlands · On-site
Led the Tech department of software engineers and DevOps specialists, improving how the platform was built and operated.
- Improved development workflows and team collaboration.
- Coached team members to support personal and professional growth.
- Coordinated and managed technical projects across teams.
- Guided technical direction and platform architecture.
- Built business cases and managed the technology budget.
- Contributed to multi-year product strategy as part of the management team.
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Feb 2013 - Dec 2014
Teamlead Engineering
Paylogic International · Netherlands · On-site
Led a software engineering team, introduced Scrum, and improved delivery predictability while scaling teams.
- Introduced Scrum and improved sprint predictability and scope control.
- Guided the split from one large team into three focused teams.
- Acted as Scrum master and later product owner.
- Wrote and reviewed requirements and managed technical projects.
- Designed RESTful APIs and contributed to system architecture.
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Feb 2011 - Jan 2013
Product Development Manager
Paylogic International · Netherlands · On-site
Worked at the intersection of sales and engineering, covering requirements, testing, and project delivery.
- Led requirements engineering and acceptance testing.
- Supported sales with technical scoping.
- Managed projects and incidents across teams.
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Jun 2010 - Feb 2011
Software Engineer
Paylogic International · Netherlands · On-site
Developed and maintained the ticketing platform and drove platform improvements.
- Built features for the ticketing system and maintained core services.
- Owned technical documentation and improvement initiatives.
- Contributed to architectural direction and requirements analysis.
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Sep 2009 - May 2010
Software Engineer
Topicus · Deventer, Netherlands · On-site
Worked on ParnasSys, a web-based student administration system for primary education.
- Developed new features and maintained existing functionality.
- Wrote functional designs and collaborated with stakeholders.
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Mar 2009 - Aug 2009
Research Intern
Centrum voor Wiskunde en Informatica · The Randstad, Netherlands · On-site
Researched fault localization techniques based on program invariants.
- Evaluated automatic fault localization based on invariants.
- Contributed to empirical research for a thesis project.
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May 2007 - Jul 2008
Web Developer
JWE New Media Solutions · Tiel, Netherlands · On-site
Built web solutions and turned designs into production-ready HTML/CSS.
- Developed PHP and JavaScript web features.
- Converted Photoshop designs into HTML/CSS.
Education
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Sep 2008 - Jun 2009
MSc, Software Engineering
University of Amsterdam · Amsterdam, Netherlands
Graduated cum laude.
-
Sep 2005 - Jun 2008
BSc, Computer Science
Utrecht University · Utrecht, Netherlands
Minor in Game and Media Technology.
Hard Skills
Soft Skills
Languages
Dutch - Native
English - Fluent
Spanish - Conversational