Signed proof of work. Real numbers, real repos, real launches. Public case-study cards you can inspect right now.
~200 ms → ~20 ms
Compound indexing on (tenant_id, created_at), single-join query rewrites, cache-aside on hot pages, DTO projection. Autocannon benchmarks and green CI on GitHub.
Case study
Delivered a WhatsApp Business Platform integration for PTCL Group. Owned the backend: message routing, template lifecycle, delivery-receipt reconciliation, retry queues, and the webhook layer feeding the existing CRM. Rate-limit-aware dispatchers keep the pipeline inside Meta's tier windows on high-volume billing runs.
Zero cross-tenant leaks
Postgres RLS with 8 integration tests that actively try to leak data across tenants. Boundary moved from application code to the database.