Overview
What this challenge is about.
Implement a 4-phase multi-tenant schema migration for an HR SaaS and earn your verifiable certificate.
CredentialBlockchain-anchored
ShareableLinkedIn-ready
LanguageEnglish
PaceSelf-paced
The Brief
What you'll do, and what you'll demonstrate.
Migrate 11 tables across 3.4 TB of multi-tenant Postgres data with per-tenant cutover, zero downtime, and reversible at every phase.
Earning criteria — what you'll demonstrate
- Design a 4-phase expand-contract migration that is reversible at every step
- Backfill terabyte-scale tables without breaking replication lag SLOs
- Use shadow reads + feature flags to make cutover bounded and observable
- Document a migration playbook that the on-call team can run without authors
Program Fit
Where this fits in your program.
Sharpens the same skills your degree expects you to demonstrate.
Skills
Skills you'll demonstrate.
Each one shows up on your verified credential.
Careers
Roles this prepares you for.
Real titles. Real skill bridges. Pick the one closest to your trajectory.