SaaS Platform
FinTech · Core Engineering
AWS Go Auth/OIDC
- Problem
- Legacy monolith struggling to scale past 10,000 concurrent users during peak trading hours.
- Approach
- Decomposed critical paths into Go microservices, migrated to EKS, and introduced OIDC-based auth replacing a homegrown session system.
- Outcome
- Sustained 50,000+ concurrent users; P99 latency dropped from 2.1s to 180ms; zero auth-related incidents in 12 months post-launch.
50,000+
Concurrent users
180ms (was 2.1s)
P99 latency
0 in 12 months
Auth incidents