Senior System Administrator

Computer Enterprises LLC; Chennai District; On-site; INR 2,800,000 - 5,200,000; Full time

Job summary

Senior System Administrator in Chennai, India, is sought to replace a long-serving member of our Banking domain application support and development program. You will ensure stability, security, and performance of Linux/Windows servers, Java application servers, and AWS-based environments, collaborating with Development, InfoSec, IT Infra, and DBA teams.

The ideal candidate has 10+ years in enterprise IT with hands-on experience in Linux, AWS, Java stacks, security hardening, and ITIL-aligned

Qualifications

• 12+ years of IT System Administration experience.
• Proven track record of 10+ years in large-scale enterprise environments, ideally in Banking/Financial Services.
• Strong experience with Linux (RHEL) and Windows Server administration.
• Hands-on experience with AWS Cloud (Azure exposure is a plus).
• Strong background in Java Stack application support and deployment.
• IaC with Ansible and Terraform; containerization with Docker and Kubernetes.
• DevOps toolchain: Jenkins, Azure DevOps, GitLab, GitHub; observability/monitoring tools.

Responsibilities

• Administer and maintain Linux and Windows servers.
• Manage application servers including IIS, WebSphere, and Tomcat.
• Apply and manage Java platform and application server patches.
• Maintain network devices, firewalls, appliances, and WAF configurations.
• Manage AWS Cloud infrastructure (EC2, S3, RDS, IAM, VPC, CloudWatch) and Azure exposure.
• Implement IaC using Ansible and Terraform; container workloads with Docker/Kubernetes.
• Support Java Stack applications in development and production environments.
• Ensure security/compliance with banking regulatory standards and ITIL processes.
• Participate in DR planning, high availability, and business continuity.

Skills

Linux administration

Windows Server

AWS Cloud

Java stack support

Docker Kubernetes

Ansible Terraform

CI/CD tools

Security best practices

Tools

IIS

WebSphere

Tomcat

Jenkins

Azure DevOps

GitLab

GitHub

Docker

Kubernetes

Terraform

Ansible

Prometheus

Grafana

ELK stack

Job description

Title: Senior System Administrator

Banking Domain,

Application/Product Development and Infrastructure Support (Linux, Java Application Servers, AWS, DevOps)

Work Location: Chennai, India

Experience Required: 10+ years, with long-term enterprise project experience

Experienced Senior System Administrator to replace a long-serving member of our critical Banking domain application support and development program. This role is key to ensuring the stability, security, and performance of our application environments, with a strong emphasis on collaboration between Development, InfoSec, IT Infrastructure, and DBA teams.

The ideal candidate will have extensive expertise in Linux/Windows server administration, AWS Cloud, Java Stack application servers, and enterprise security practices in a regulated, highly secure environment.

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Key Responsibilities

• Server & Infrastructure Management
  • Administer and maintain Linux servers (RedHat Enterprise Linux and other variants) and Windows servers.
  • Manage application servers including IIS, WebSphere, and Tomcat (8/9/10).
  • Apply and manage Java platform and application server patches.
  • Maintain network devices, firewalls, appliances, and WAF configurations.
• Cloud & Automation
  • Manage AWS Cloud infrastructure (EC2, S3, RDS, IAM, VPC, CloudWatch) and exposure to Azure environments.
  • Implement and manage Infrastructure as Code (IaC) using Ansible and Terraform.
  • Administer containerized workloads using Docker and Kubernetes.
• Application & DevOps Support
  • Support Java Stack applications in development and production environments.
  • Deploy applications across environments, ensuring security and compliance requirements are met.
  • Work with CI/CD tools such as Jenkins, Azure DevOps, GitLab, and GitHub for build and deployment automation.
  • Integrate and maintain observability tools for performance and health monitoring.
• Security & Compliance
  • Collaborate with Development and Information Security teams to implement and enforce secure practices.
  • Manage vulnerability remediation, patch cycles, and security hardening.
  • Ensure compliance with banking regulatory standards and ITIL processes (Incident, Problem, Change Management).
• Resilience & Business Continuity
  • Participate in Disaster Recovery (DR) planning, testing, and execution.
  • Ensure high availability of business-critical systems.
  • Maintain readiness for business continuity scenarios.

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Required Skills & Qualifications

• 12+ years of IT System Administration experience.
• Proven track record of 10+ years in large-scale enterprise environments, ideally in Banking/Financial Services.
• Strong experience with Linux (RHEL) and Windows Server administration.
• Hands-on experience with AWS Cloud (Azure exposure is a plus).
• Strong background in Java Stack application support and deployment.
• Application server expertise in Tomcat, WebSphere, IIS.
• Skilled in Infrastructure as Code (Ansible, Terraform).
• Familiarity with Observability/Monitoring tools (e.g., Prometheus, Grafana, ELK stack).
• Knowledge of containerization (Docker, Kubernetes).
• DevOps toolchain experience: Jenkins, Azure DevOps, GitLab, GitHub.
• Strong Information Security process and tooling knowledge.
• Familiarity with firewall appliances, WAF, and secure network configurations.
• Understanding of ITIL processes and enterprise change control.
• Understand Info Sec practices

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Preferred Certifications

• AWS Certified SysOps Administrator or Solutions Architect.
• Red Hat Certified Engineer (RHCE) or Microsoft Certified: Windows Server Administration.
• Oracle Certified Professional (for database fundamentals).
• ITIL Foundation or higher.
• Kubernetes Administrator (CKA) or Docker Certified Associate.

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Soft Skills

• Strong collaboration skills to work across Development, DBA, Infra, and Security teams.
• Analytical thinking and problem-solving ability in high-pressure, high-security environments.
• Excellent documentation and communication skills.
• Proactive, detail-oriented, and committed to service excellence.