Certificate of completion
Mission 8: Build a Recipe API
Presented to
Joe Onn Lim
For successfully completing and defending Mission 8, Build a Recipe API.
Skills mastered
Express.jsSQLDeploymentServers RecapPostmanBuilding REST APIs with Express.jsBuild QuoTest Backend ApplicationPostgreSQL and SupabaseConnecting Express to PostgreSQLBackend Security, Configuration, and DeploymentBuild Myvies Backend with DatabaseBuild ABC Backend with Relational Tables
Verified by Sigmaschool on 30 September 2026
SIGMA-M8-YGXCLG30 September 2026
https://sigmo.dev/joe-efb6a7/certificates/m8
Joe Onn Lim's Mission 8: Build a Recipe API certificate
This certificate was awarded to Joe Onn Lim on 30 September 2026 for completing Mission 8, Build a Recipe API, at Sigmaschool.
What that means: “I can build a REST API with Express.js and PostgreSQL that creates, reads, updates, and deletes data, test it with Postman, and deploy it online.”
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.
