I build small, testable automation systems and upstream reliability fixes.
- Spreadsheet structure audit — from KRW 49,000
- GitHub Actions CI diagnosis — from KRW 79,000
- AI agent skill and evaluation harness — from KRW 99,000
- Technical starter kits — from USD 39
- Developer Reliability Bundle — USD 49
View scope, prices, and public request forms
Review the five-product reliability bundle
Run the free spreadsheet integrity scorecard
Run the free 10-question CI reliability scorecard
Try the free technical samples
Diagnose an exec format error locally
- reproduce before changing code;
- define acceptance cases before automation;
- separate code defects from account, legal, billing, and external-service gates;
- keep customer secrets and private data out of public issues;
- report verification evidence and known limitations.
My public contributions cover C, C++, Go, shell, GitHub Actions, parser hardening, integer-boundary handling, resource lifetime, and cross-architecture verification.
Open pull requests demonstrate implementation work. They are not represented as accepted rewards, customer outcomes, or earned revenue.