System Administrator

R Systems; Singapore; On-site; SGD 78,000 - 134,000; Full time

Job summary

R Systems in Singapore is seeking a skilled systems integration specialist to manage multi-tier Java platform integrations and middleware. You will configure APIs, messaging systems, and file-based interfaces while coordinating with cross-functional teams across the enterprise to ensure reliable data flows and low-latency performance.

The role requires hands-on experience with middleware technologies, REST/SOAP APIs, and enterprise-grade messaging, along with strong problem-solving and

Qualifications

• Clear communication skills and ability to work independently.
• Experience in system integration for real-time, low-latency apps across co-location and cross-border rollout.
• Experience with multi-tier Java platform integrations and middleware

Responsibilities

• Work with multi-tier Java platform integrations and middleware.
• Configure and support middleware, APIs, messaging systems, and file-based interfaces.
• Monitor, troubleshoot integration issues and data flow bottlenecks.
• Coordinate with application, infrastructure, network, and vendor teams during implementations and support.
• Manage end-to-end integration testing including SIT and UAT support.
• Develop and maintain technical docs, architecture diagrams, and runbooks.

Skills

System integration

Independent work

Communication skills

Tools

JBOSS

WebSphere

REST APIs

SOAP APIs

IBM MQ

SFTP/SSH

Linux/Unix

SQL/Databases

CI/CD

Job description

Responsibilities:

• Experience working with multi-tier application (Java Plaftorm)
• Configure and support middleware, APIs, messaging systems, and file-based interfaces.
• Monitor and troubleshoot integration issues, data flow failures, and performance bottlenecks.
• Coordinate with application, infrastructure, network, and vendor teams during implementation and support activities.
• Manage end-to-end integration testing, including SIT and UAT support.
• Develop and maintain technical documentation, architecture diagrams, and operational procedures.

Requirement:

• Good communication skills
• Able to work independently
• System integration experience in co-location and cross country rollout for a real-time, low-latency application.

Technical Skills

• System integration and middleware technologies
• JBOSS
• WebSphere
• REST/SOAP APIs
• XML, JSON
• Message queues (IBM MQ)
• SFTP, SSH, Connect Direct
• Server Firewalls, ID setups
• SQL and database technologies (Oracle, SQL Server)
• Linux/Unix commands and shell scripting
• MS-Windows Server (Basic administration and troubleshooting)
• DevOps CI/CD Pipeline