Rahul Upadhyay

At Ruffleberry India Pvt. Ltd., I built a production management dashboard that replaced manual order tracking with a seven-state order lifecycle and cut order-processing errors by 70–80%. It integrates with the Shopify Admin API and verifies Shopify webhooks with HMAC-SHA256.

I also implemented rate limiting and role-based access control across more than 60 views. An append-only inventory ledger derives stock levels from immutable entries, eliminating write-race bugs during concurrent updates.

To support reliable releases and operations, I built a Django TestCase suite with more than 300 methods and automated encrypted database backups. I also automated payroll with a payout calculator, cutting processing time by 50–70%.

On CamelTrunk, an international parcel locker and consolidation SaaS project, I implemented idempotent Razorpay payment capture to prevent duplicate charges across concurrent verification and webhook paths. I’m looking to build secure, well-tested Django backends.