Linux Backend developer

DNA INFOTECH PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

DNA INFOTECH PTE. LTD. is seeking an experienced backend developer to design and implement payment system integrations for international gateways. You will work on backend services and contribute to migration efforts toward Base24-eps on Linux environments.

The role requires a strong background in C++, RHEL/Linux, AWS Cloud, and PostgreSQL, with a focus on reliability, PCI-DSS compliance, and cross‑functional collaboration with QA, frontend, and business teams.

Qualifications

• Bachelor’s degree in computer science, software engineering, or related field.
• 5+ years of backend development experience with payments systems and switching platforms.
• Experience with Open System RHEL and AWS Cloud.
• Hands-on experience with PostgreSQL.

Responsibilities

• Assist in analyzing project requirements and contribute to designs.
• Develop backend systems for international payment gateway integrations (Visa, Mastercard, Amex, UPI).
• Support migration to Base24-eps on Linux RHEL or Cloud.
• Collaborate with QA, frontend, and business stakeholders to deliver robust solutions.
• Work with vendors, schemes and banks under guidance of technical leads.
• Develop solutions following PCI‑DSS and international card scheme requirements.
• Optimize performance and reliability of switching systems and back-end services.
• Document system architecture, integration flows, and technical specifications.

Skills

Backend dev

Payment systems

Linux development

PostgreSQL

AWS Cloud

RHEL

Education

Bachelor's degree in CS/SE

Tools

IBM MQ

Base24-eps

Korn Shell

Job description

Responsibilities

• Assist in analyzing project requirements and contribute to functional and technical designs.
• Development of backend systems for international payment gateway integrations (e.g. Visa, Mastercard, Amex, UPI).
• Support migration and implementation to Base24-eps on Linux RHEL or Cloud, replacing legacy systems.
• Collaborate with cross‑functional teams including QA, frontend, and business stakeholders to deliver robust solutions.
• Work with vendors, schemes and banks under guidance of technical leads.
• Develop solutions in accordance with PCI‑DSS, payment security standards, and international card scheme requirements.
• Optimize performance and reliability of switching systems and backend services.
• Document system architecture, integration flows, and technical specifications.

Requirements

• Bachelor’s degree in computer science, software engineering, or related field.
• 5+ years of experience in backend development, with a strong focus on payment systems and switching platforms.
• Strong experience with Open System RHEL and AWS Cloud.
• Experience in C++, Korn Shell Script and Linux-based development.
• Experience with IBM MQ middleware will be advantages.
• Experience with Base24-eps will be advantages.
• Hands‑on experience with PostgreSQL database.
• Strong communication skills and ability to work collaboratively across teams.