Certificate of completion
Mission 3: Debug & Restore the Ledger Balance System
Presented to
Deric Yee
For successfully completing and defending Mission 3, Debug & Restore the Ledger Balance System.
Skills mastered
JS ES6DebuggingClassesModulesEcmaScriptCurrency Converter APIDebugging & Error Handling
Verified by Sigmaschool on 17 July 2026
SIGMA-M3-J6EC2B17 July 2026
https://sigmo.dev/deric-yee-5bf0b7/certificates/m3
Deric Yee's Mission 3: Debug & Restore the Ledger Balance System certificate
This certificate was awarded to Deric Yee on 17 July 2026 for completing Mission 3, Debug & Restore the Ledger Balance System, at Sigmaschool.
What that means: “I can take a broken codebase I didn't write, read its errors, fix its logic, and explain every fix.”
Sigmaschool is a mastery-based programme where students build real, working software instead of watching lectures. Every mission is shipped to a live URL, walked through on video, and marked by a human instructor before it counts, so a certificate here means the work was seen and defended, not just finished.
