Mark Van Der Velden
Chief Technology Officer at Greeny Energy
Netherlands
Summary
🤩
Rockstar🎓
Top SchoolMark Van Der Velden is a seasoned technology leader and CTO with 16 years of experience transitioning from consumer and high-scale distributed systems to green tech and energy storage. He combines hands-on engineering — with open-source contributions to projects like progressbar (Go) and image-processing microservices — with strategic product and company leadership across startups and scaleups. At Greeny Energy he’s driving product and technical strategy to turn battery waste into high-quality energy storage, having previously tackled grid congestion and energy management at Econtro and UNETI Labs. Known for championing engineering best practices, system reliability and pragmatic architecture, he still enjoys whiteboard sessions and diving into tricky technical problems himself. Based in the Netherlands, he brings entrepreneurial grit, a track record of shipping production systems, and a knack for making complex technical concepts actionable for business outcomes.
16 years of coding experience
19 years of employment as a software developer
Beng, Media Technology, Beng, Media Technology at HU University of Applied Sciences Utrecht (Hogeschool Utrecht)
English, Dutch
Stackoverflow
1,000reputation
92kreached
6answers
2questions
javascript
top-5%
Github Skills (31)
image-processing10
utf10
testing10
microservices-application10
php10
go10
progress-bar10
command-line10
golang10
http-caching10
c-library10
microservices10
common-library10
composer10
javascript9
Programming languages (13)
Github contributions (5)
h2non/imaginary
Oct 2015 - Apr 2019
Fast, simple, scalable, Docker-ready HTTP microservice for high-level image processing
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 releases, 70 commits, 32 PRs in 3 years 5 months
Contributions summary:Mark primarily focused on enhancing the functionality of the image processing microservice. Their contributions include adding and refining features like HTTP caching control via the `-http-cache-ttl` flag. They also implemented code style improvements and fixed minor issues. Furthermore, the user added support for smart crop capabilities, further extending the image processing options available.
dockerimage-processingmicroservicesimageresize-images
schollz/progressbar
May 2018 - May 2018
A really basic thread-safe progress bar for Golang applications
Role in this project:Back-end Developer
Back-end DeveloperContributions:15 commits, 3 PRs, 9 comments in 13 days
Contributions summary:Mark primarily contributed to the development of the `progressbar` library, focusing on core functionality and usability. Their contributions included adding features such as rendering a blank progress bar and resetting the bar's state. The user also refactored the code, improving its structure and introducing options for customization like setting the bar's width and theme, as well as updating the example. They implemented changes to ensure the correct behavior of the progress bar by implementing tests.
golangprogress-barthread-safetyprogressbarcommand-line
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