Senior Linux & Middleware Systems Engineer

PERSOL; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

PERSOL is seeking a seasoned IT Infrastructure Specialist in Singapore to provide ongoing OS and middleware administration, and to drive infrastructure initiatives. You will work with Windows, Linux, IBM AIX, and Solaris systems while deploying middleware like WebSphere and MQ, and managing OpenShift/Kubernetes clusters.

You will also configure databases (IBM DB2, PostgreSQL, MySQL) and LDAP services, and collaborate across cross-functional teams on cloud adoption and legacy system modernization.

Qualifications

• Minimum of 5-8 years of relevant IT experience with OS and middleware administration.
• Strong understanding of application architecture including authentication, web servers, databases and messaging servers.
• Proficiency in Unix Shell scripting.
• Hands-on experience with containerization technologies such as Docker and Kubernetes.
• Willingness to explore legacy systems while embracing new cloud services.
• Cloud-related certifications (AWS, Azure, GCP, or Red Hat) are an advantage.
• Excellent communication and collaboration skills.

Responsibilities

• Provide ongoing support and maintenance for operating systems, including Windows, Linux, IBM AIX, Solaris.
• Deploy, configure, and maintain middleware infrastructure (WebSphere, MQ, Red Hat JBoss EAP and AMQ).
• Install, configure, and manage databases (IBM DB2, PostgreSQL, MySQL).
• Install, configure, and maintain LDAP servers (IBM Security Directory Server, Apache LDAP).
• Manage container orchestration platforms (Kubernetes, OpenShift) clusters.
• Troubleshoot issues, apply patches, and perform upgrades on OS and middleware.
• Support bid activities by sizing infrastructure and leading technical discussions.

Skills

Unix Shell scripting

Communication

Cloud platforms knowledge

Tools

WebSphere

MQ

JBoss EAP

OpenShift

Docker

Kubernetes

Job description

PERSOL is seeking a seasoned IT Infrastructure Specialist in Singapore to provide ongoing OS and middleware administration, and to drive infrastructure initiatives. You will work with Windows, Linux, IBM AIX, and Solaris systems while deploying middleware like WebSphere and MQ, and managing OpenShift/Kubernetes clusters.

You will also configure databases (IBM DB2, PostgreSQL, MySQL) and LDAP services, and collaborate across cross-functional teams on cloud adoption and legacy system modernization.