W Van Halderen
Lead Developer at NLnet Labs
Amsterdam, North Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolW Van Halderen is a pragmatic lead developer with 11+ years building and guiding teams to deliver reliable, standards-driven internet software, currently leading OpenDNSSEC work at NLnet Labs. He blends deep systems expertise in C and Java with practical experience across Python, Rust, PHP and shell languages, preferring fit-for-purpose tools over fashion. He has led teams of 10+ engineers to design new architectures, maintain legacy stacks, and drive product roadmaps for DNS, smart metering and web platforms. An active contributor to open-source security tooling, he has merged substantive changes to SoftHSMv2 including crypto init, multi-part encryption tests and null-pointer fixes. Not motivated by perks, he prioritizes long-term product ownership, balanced work-life boundaries and pragmatic compliance with internet standards. Based in Amsterdam, he is open to senior roles that match his salary and responsibility expectations and avoid entry-level mismatches.
11 years of coding experience
11 years of employment as a software developer
Drs/MSc, Computer Science, Drs/MSc, Computer Science at Universiteit van Amsterdam
Github Skills (8)
c-language10
cprogramming-language10
pkcs10
cryptography9
testing8
des7
aes7
security7
Programming languages (6)
Github contributions (5)
softhsm/SoftHSMv2
Mar 2016 - Sep 2021
SoftHSM version 2
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 reviews, 116 commits, 73 PRs in 5 years 6 months
Contributions summary:W primarily contributed to the SoftHSMv2 repository by merging development branches, indicating a role in integrating code changes. Their modifications include adjustments to the source code files related to the core functionalities, such as initialization, mechanism list, encryption, decryption, and key generation. The user's work also involved the improvement of test cases by adding test input validation and implementing a multi-part test on encrypt and decrypt functionality and fixes for null pointer parameters.
pkcs11infinibandsofthsmhsm
halderen/SoftHSMv2
Feb 2017 - Jul 2023
SoftHSM version 2
Contributions:65 pushes, 20 branches in 6 years 6 months
softhsm
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