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- Incident Response: Designed and built a fully automated incident response system for the largest bank in the Netherlands.
- Load Test: Designed and built a self-service load-testing environment for the world's largest energy company.
- Cost Saving: Built infrastructure for a high-traffic website, providing 99.99% uptime for nearly 5 years while reducing infrastructure costs from $30k/month to less than $1k/month.
- Data/AI: Built a face recognition platform from scratch, extracting 159 million faces from 25 million videos and developing a search engine on top of my model, with total infrastructure costs under $2k.
- Open Source: Early Ansible contributor and author of Ansible-shell. https://github.com/ansible/ansible/blob/devel/lib/ansible/cli/console.py#L2
- Bonus: Built a hosting company from scratch at 17, where I learned how to negotiate, issue invoices, and read contracts.
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