Senior Backend Developer – Payments

Work Location: Singapore

Role Overview

Join our team to design and scale mission‑critical payment systems that power millions of transactions across international card networks, real‑time QR payments, and high‑volume switching platforms. Your work will support both retail POS and e‑commerce environments, where every millisecond impacts revenue, reliability, and trust.

What You’ll Do

• Design and build high-performance backend systems supporting Visa, Mastercard, Amex, and UPI payment integrations at scale.
• Architect secure, scalable solutions across authorization, clearing, settlement, and merchant onboarding workflows end-to‑end.
• Lead modernization initiatives, migrating legacy payment platforms to Linux RHEL or cloud‑based architecture environments.
• Optimize switching systems for ultra‑high transaction volumes, ensuring low latency, resilience, and consistent syst...