Back End Developer (VisaMastercard 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

Required Experience:

IC