Jan Casteleijn
R&D Director Mede-eigenaar at Let Things Talk
Sneek, Frisia, Netherlands
Summary
👤
Senior🎓
Top SchoolJan Casteleijn is an R&D director and entrepreneur with 11+ years designing and delivering Microsoft and VMware-based infrastructure solutions for migrations, consolidations, and critical international projects. He founded and scaled Let Things Talk from prototype to a production IoT platform, owning product technology, partner integrations and technical strategy. Known for combining hands-on system architecture (Active Directory, Office 365, SCOM, SQL, Windows Server, DFS, IIS, clustering, DNS/DHCP) with risk and vulnerability analysis, he also brings proven leadership in small team management, vendor negotiations and budget oversight. Comfortable in high-impact outsourcing and virtualization environments, Jan blends deep operational experience with a product-focused mindset to turn complex legacy estates into optimized, auditable platforms. An uncommon strength is his track record moving ideas from scratch to mature platforms while remaining the technical owner across development and partner ecosystems.
11 years of coding experience
ICT, ICT at Friesland CollegeBachelor of Science (BSc), Computer Science, 8.5, Bachelor of Science (BSc), Computer Science, 8.5 at Windesheim
Dutch, English
Stackoverflow
1reputation
56reached
0answers
1question
Github Skills (19)
texas-instruments7
xamarin6
xamarin-android6
backend5
pythonic5
toolbox5
rendering4
python4
grafana-plugin4
health3
docker3
chrome3
snmp3
grafana3
headless-browser2
Programming languages (4)
Github contributions (5)
janwillemCA/AdventOfCode
Dec 2015 - Mar 2020
Contributions:4 pushes, 1 branch in 4 years 4 months
janwillemCA/SnakeClassic
Feb 2017 - Feb 2017
Contributions:15 pushes, 1 branch in 2 days
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