Case Study — Modernizing a Billing Subsystem
B2B SaaS with a multi‑tenant monolith and quarterly releases. Goal: unlock pricing features with lower regression risk.
Problem & Constraints
Release lead time and regression risk blocked new pricing features.
Approach
Identify seams around billing; apply strangler pattern; add contract tests; feature flags for phased rollout; observability dashboards.
60%
Lead time reduction
↓
Change failure rate
30%
p95 latency improvement