At Practitionist, I architected a multi-service booking engine for consultations, subscriptions, webinars, and classes. I designed server-side booking constraints and role-based REST APIs across four dashboards, helping cut booking failure rates by 30%.
I integrated payment gateway flows and server-side caching for availability lookups, reducing repeated database reads and improving API response times by 15%.
At Ziovy, I built an admin platform for rewards, engagement, and campaign management, integrating GraphQL APIs for real-time metrics and configurable campaign rules. I reduced dashboard data-fetch latency by 35% by consolidating requests and selecting only the fields each view needed.
I also built QueueFlow, a distributed job queue using Redis and PostgreSQL, with crash recovery, retries, and idempotency protections. Its chaos tests processed 320 jobs with zero lost or duplicated, and I added a React dashboard for queue operations.
