Back End Developer

Peferred Nationality: Singaporean/Singapore PR

Key Responsibilities

• Lead the design and development of backend systems for international payment gateway integrations (e.g., Visa, Mastercard, Amex, UPI).
• Architect and implement secure, scalable app features for payment authorization, settlement, and onboarding.
• Drive migration and implementation projects on Linux RHEL or Cloud, replacing legacy systems.
• Develop secure and scalable application for payment authorization, settlement, and onboarding processes.
• Collaborate with cross-functional teams including QA, frontend, and business stakeholders to deliver robust solutions.
• Ensure compliance with PCI-DSS, other payment security standards and international card scheme mandates.
• Optimize performance and reliability of switching systems and backend services.
• Provide technical leadership and mentorship to junior developers and support teams.
• Document system architecture, integration flows, and technical specifications.

Education and Experience

• Bachelor’s degree in computer science, Software Engineering, or related field.
• 12+ years of experience in backend development, with a strong focus on payment systems and switching platforms.

Skills and Knowledge

• Proficiency in C++, Korn Shell Script, and Linux-based development.
• Strong experience with Base24-eps, Visa/Mastercard compliance, and QR integration.
• Hands-on experience with PostgreSQL/MySQL and IBM MQ upgrades.
• Familiarity with Open System RHEL, POS/EDC, and ATM configurations.
• Excellent problem-solving skills and ability to manage production issues effectively.
• Strong communication skills and ability to work collaboratively across teams.