Aviraj Sidhu

Backend-focused engineer with 6+ years designing and owning payment, banking-workflow, and commerce-integration systems end to end — from schema and API design through production incidents.

Across every company I've worked at, the pattern is the same: I get pulled into systems that are manual, fragile, or fragmented across teams, and I turn them into automated, auditable platforms. A Jira-style change-management system for a bank coordinating internal engineers and external vendors. A payments backend handling multi-provider payouts, collections, and ledger holds. A commerce backend that keeps orders alive even when Zoho, Stripe, or the warehouse system go down. A lead-matching engine that replaced a matcher which simply broke on messy data.

Currently at Zethic, I own architecture, API contracts, and release planning across 2-3 concurrent banking, payments, and e-commerce client engagements, mentor the developers on each, and act as the technical escalation point when integration issues cross frontend/QA/infrastructure boundaries.

Core stack: Node.js, TypeScript, NestJS, Express.js, Go (Gin), PostgreSQL, MySQL, MongoDB, Redis. I'm looking to move deeper into backend architecture / technical lead roles, particularly in payments and fintech systems.