Corporate 2019-03 → 2021-05
Enterprise Identity Migration
Led the migration of 40k internal users from a legacy SSO system to a modern OIDC-based identity platform with zero outage.
- Role
- Staff Engineer
- Period
- 2019-03 → 2021-05
Tech stack
- Java
- OIDC
- Keycloak
- Terraform
- PostgreSQL
Overview
Designed and led a two-year migration of a Fortune-500 employer’s identity platform, replacing a 15-year-old SSO with a modern OIDC implementation. Worked across security, platform, and 30+ application teams.
Highlights
- Zero unplanned outage during the rollout.
- Reduced sign-in latency by 60% on average.
- Authored the internal SSO integration guide that became the company-wide standard.
Lessons Learned
Migrations are 20% engineering and 80% communication. The architectural decisions were straightforward; the rollout planning was where the real work happened.