Software Support Internship at Vaulsys – Karachi, Pakistan Vaulsys

Pintern; Karachi Division; On-site; PKR 1,200,000 - 1,800,000; Full time

Job summary

Vaulsys, a technology company delivering an API-based payments platform, is hiring a Software Support Engineer to be the 24/7 first point of contact for high-volume transactions, performing real-time monitoring, incident response, and root-cause analysis.

The role requires strong Java production support experience, JVM tuning, Oracle/PostgreSQL troubleshooting, and knowledge of ISO 8583, PCI DSS, Visa/Mastercard. Evening shift, on-site in Karachi.

Qualifications

• 2–5 years of experience in production support.
• Strong Java production support experience with Jetty-based applications.
• Experience with Oracle or PostgreSQL database troubleshooting.
• Fintech domain knowledge (ISO 8583, PCI DSS, Visa/Mastercard) highly preferred.

Responsibilities

• Provide 24/7 on-call production support and handle P1/P2 incidents.
• Troubleshoot Java (Jetty-based) applications including thread/heap dumps and JVM tuning.
• Support Oracle/PostgreSQL database troubleshooting and performance analysis.
• Investigate ISO 8583 payment message flows, including authorization, clearing and settlement issues.
• Perform log analysis via Elastic/OpenSearch and maintain runbooks and incident reports.

Skills

Java

Database troubleshooting

JVM tuning

ISO 8583

Log analysis

Tools

Elastic/OpenSearch

Job description

Vaulsys is a technology company specializing in payment solutions, providing an API-based omnichannel platform covering POS/ATM switching, card management, fraud management (AML/KYC), API gateway, mobile wallet, and open banking APIs.

Vaulsys is hiring a Software Support Engineer to act as the primary 24/7 point of contact for customers on a high-volume financial transaction platform, handling real-time monitoring, incident response, and root cause analysis.

Responsibilities: provide 24/7 on-call production support and handle P1/P2 incidents; troubleshoot Java (Jetty-based) applications including thread/heap dumps and JVM tuning; support Oracle database troubleshooting; investigate ISO 8583 payment message flows, authorization, clearing and settlement issues; perform log analysis via Elastic/OpenSearch; maintain runbooks and incident reports.

Requirements: strong Java production support experience; Oracle/PostgreSQL database troubleshooting; JVM internals knowledge; fintech domain knowledge (ISO 8583, PCI DSS, Visa/Mastercard) highly preferred; 2-5 years experience. Evening shift (12 PM-9 PM PST). On-site, Karachi.