Back End Developer (Visa/Mastercard Payment Integration)

Back End Developer (Visa/Mastercard Payment Integration)

Important Information

Location: Singapore

This role focuses on core payment gateway backend development within a direct acquirer environment. The developer will design and maintain secure, high-availability systems that integrate with Visa, Mastercard, and other card schemes, ensuring compliance with PCI-DSS and scheme mandates. The role requires strong exposure to POS and e-commerce payment processing, Linux-based development, and high-performance transaction systems.

Mandatory Skills

Backend development experience in payment systems (POS & E-Commerce) – Hands-on experience building transaction processing systems covering authorization, settlement, reconciliation and onboarding flows

Visa / Mastercard / International Card Scheme integration – Experience working with scheme specifications, ISO messaging, compliance mandates and certification processes

Secure API & Payment Gateway Development – Design and implementation of scalable backend services supporting high transaction volumes.

PCI-DSS Compliance & Payment Security Standards – Knowledge of encryption, tokenization, secure key management and audit requirements

C++ Development – Strong programming capability in C++ for backend system development

Korn Shell Scripting – Ability to develop and maintain shell scripts in Linux environments for automation and batch processing.

Linux (RHEL/Open Systems) Development Environment – Deployment, troubleshooting and performance tuning in Red Hat Enterprise Linux environments

Database Management (PostgreSQL / MySQL) – Schema design, performance tuning, query optimization in transactional systems.

Base24-eps knowledge (Advantage) – Familiarity with transaction switching platforms such as BASE24-eps.

Strong troubleshooting & production support experience – Ability to debug high-severity transaction failures in live environments.

Communication & Stakeholder Collaboration – Ability to work with QA, Frontend, business teams and scheme representatives.

About Encora

Encora is a global company that offers Software and Digital Engineering solutions. Our practices include Cloud Services, Product Engineering & Application Modernization, Data & Analytics, Digital Experience & Design Services, DevSecOps, Cybersecurity, Quality Engineering, AI & LLM Engineering, among others.

At Encora, we hire professionals based solely on their skills and do not discriminate based on age, disability, religion, gender, sexual orientation, socioeconomic status, or nationality