Sinisa Kljajic

Backend / full-stack engineer. Systems that move money: payments, billing, integrations.

About

Eight years building full-stack products, most recently in fintech: payment systems, account infrastructure, and regulated onboarding flows. I work close to the ledger: the parts that have to reconcile, stay auditable, and behave correctly when something upstream fails.

Comfortable owning a feature from schema to production, and equally comfortable in someone else's ten-year-old codebase.

Stack

TypeScript, Go, React, Next.js, Node, PostgreSQL, Docker.