Sander Van Harmelen
Founder & Engineer at Helixer
Emmeloord, Flevoland, Netherlands
Summary
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RockstarSander Van Harmelen is a founder and engineer with 11+ years building resilient, mission-critical systems and industrial data products from the factory floor to the cloud. As founder of Helixer he turned firsthand experience with disconnected operational data into a product that unifies industrial telemetry into a single trusted view for operators, engineers, and managers. His background includes technical leadership at Schuberg Philis and a hands-on engineering stint at HashiCorp, blending operational rigor with modern cloud-native practices. Sander contributes to open-source tooling in industrial protocols—most notably improving a Rust OPC UA client/server implementation to harden sessions, subscriptions, and certificate handling. Based in the Netherlands, he prefers practical, auditable solutions over buzzwords and builds software that teams can rely on in high-stakes environments. He brings a rare mix of systems-level troubleshooting, product-minded engineering, and startup grit to industrial automation challenges.
11 years of coding experience
19 years of employment as a software developer
Github Skills (8)
rust10
opc-ua10
security9
open625419
embedded9
error-handling8
iot8
multithreading8
Programming languages (25)
Github contributions (5)
locka99/opcua
Sep 2020 - Apr 2022
A client and server implementation of the OPC UA specification written in Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:21 reviews, 19 commits, 38 PRs in 1 year 6 months
Contributions summary:Sander primarily contributed to the implementation of the OPC UA specification in Rust. Their work included adding features such as service faults and improving the handling of session errors within the client. The user also focused on improving security by allowing custom-named certificates and skipping additional certificate validations. Furthermore, the user addressed thread leaks in the session activity and ensured subscriptions were correctly kept alive.
iec-62541opcuarustspecificationopc-ua
svanharmelen/vim-go
Nov 2015 - Dec 2019
Contributions:25 pushes, 10 branches, 1 tag in 4 years 1 month
golangplugin-developmentvim
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