Senior IT Infrastructure Engineer

COMBUILDER PTE LTD; Singapore; On-site; SGD 90,000 - 120,000; Full time

Job summary

A leading middleware solutions provider in Singapore is seeking a seasoned Middleware & Cloud Infrastructure Specialist. Candidates should possess over 10 years of experience with technologies like IBM MQ and WebSphere, along with expertise in cloud infrastructure and DevOps practices. This position will support and automate middleware solutions across various environments while providing critical incident resolution and overseeing cloud migration projects.

Qualifications

• At least 10 years working experience with strong hands-on technical experience.
• Strong knowledge of SSL/TLS configuration across middleware.
• Proficient in Linux (RHEL, CentOS) and AIX.

Responsibilities

• Design, implement, and support middleware infrastructure across environments.
• Deploy and maintain secure cloud infrastructure using AWS.
• Lead CI/CD implementation using Jenkins, Git, Docker, and Kubernetes.

Skills

IBM MQ

WebSphere

WebLogic

Tomcat

JBoss

AWS Certified Solutions Architect - Associate

Jenkins

Docker

Kubernetes

Ansible

Education

Bachelor’s degree in Computer Science, Information Technology, Engineering or related field

Tools

Control-M

ITRS Geneos

HP OM

Akamai

NDM

Job description

Job Summary:

We are looking for a seasoned and certified Middleware & Cloud Infrastructure Specialist. The ideal candidate will have a strong background in IBM MQ, WebSphere, WebLogic, and Open Source middleware (Tomcat, JBoss), coupled with cloud expertise (AWS Certified Solutions Architect - Associate), and hands-on DevOps skills in Jenkins, Docker, Kubernetes, and Ansible.

Responsibilities:

• Design, implement, and support middleware infrastructure (MQ, WAS, WebLogic, Apache, Tomcat, JBoss) across development, QA, UAT, and production environments.
• Deploy and maintain secure cloud infrastructure using AWS (EC2, IAM, S3, VPC, Route 53, AMI).
• Manage SSL configuration, clustering, load balancing (F5), and high availability setups for middleware systems.
• Lead CI/CD implementation using Jenkins, Git, Docker, and Kubernetes; write automation scripts using Ansible and Bash.
• Provide L3 support, resolve critical incidents, troubleshoot performance issues, and conduct root cause analysis (RCA).
• Drive and manage cloud migration, application integration, and infrastructure optimization projects.
• Coordinate across global teams (Dev, QA, PM, Security, Vendors) to manage releases, changes, and compliance activities.
• Participate in change advisory board (CAB) meetings, ensure alignment with ITIL processes, and oversee service delivery.
• Propose and implement automation initiatives (e.g., chatbot deployment, automated monitoring) to reduce manual effort and improve uptime.
• Mentor junior team members, document SOPs, and contribute to service improvement plans (SIPs).

Requirements:

• Bachelor’s degree in Computer Science, Information Technology, Engineering or related field.
• At least 10 years working experience with strong hands-on technical experience (Level 3) in the following areas:

i.) IBM WebSphere Application Server (WAS) – installation, configuration, clustering, tuning, and deployment.

ii.) IBM MQ – setup, administration, clustering, security (MQ SSL), monitoring, and troubleshooting

iii.) WebLogic Server – domain creation, deployment, and maintenance

iv.) JBoss and Apache Tomcat server administration

v.) IBM HTTP Server (IHS) and Apache Web Server – configuration, SSL setup, and integration.

vi.) Strong knowledge of SSL/TLS configuration across MQ, WAS, IHS, and WebLogic

vii.) Cloud migrations and working with cloud vendors/partners - familiarity with IBM Cloud and hybrid infrastructure integration.

viii.) Solid experience with DevOps tools: Jenkins, Git, Ansible, Docker and Kubernetes.

• Professional certification - AWS Certified Solutions Architect – Associate
• Proficient in Amazon Web Services (AWS) components such as EC2, S3, IAM, AMI, Route 53, VPC, Security Groups
• Shell scripting proficiency (Bash, Korn) for automation
• Integration with job schedulers like Control-M
• Experience with enterprise monitoring tools like ITRS Geneos, HP OM and etc.
• Familiarity with logging and performance tuning using built-in middleware utilities and third-party tools
• Experience with F5 Load Balancer – pool creation, routing, SSL offloading
• Exposure to WebSeal and Tivoli Access Manager (TAM) for secure authentication
• Understanding of firewall rules, VPNs, DNS (Route 53), and general networking protocols
• Proficient in Linux (RHEL, CentOS) and AIX – system management, file systems, user/group management, cron jobs

Additional Skills & Tools:

• Automation of deployment processes across multiple environments (DEV, QA, UAT, PROD)
• MQ scripting and utility tools creation for internal use
• Integration with enterprise tools like CMDB, HPoMI for managing IT infrastructure and services
• Akamai configuration knowledge (Web Acceleration and Caching)
• Familiar with NDM (Connect: Direct) for file transfers and job handling