Summary
Overview
Work History
Education
Skills
Certification
Key Achievements
Timeline
Generic

EDWIN NOEL RAJARATHINAM

Singapore

Summary

Over 20+ years of experience in delivering infrastructure services and developing best practices in technical leadership. Expertise in middleware administration and collaboration with technology groups to align infrastructure services with business objectives. Proven track record in ensuring high availability of services for financial institutions, with a focus on resiliency and performance. Skilled in project lifecycle management, DevOps, and cloud service assessments, with hands-on experience in various operating systems and application migrations.

Overview

24
24
years of professional experience
1
1
Certification

Work History

Infrastructure Senior Tech Analyst

CITI BANK
03.2020 - Current
  • Led over 100 solutions architectures for 12+ countries in Asia/EMEA, which included service improvements, tech mandates, and regulatory projects for digital banking, wealth management, ATMs, cards, and data LOBs.
  • Led technology solutions architecture that includes web applications, cloud, AI Ops, Java Runtime (WebSphere/Tomcat), messaging (MQ/Solace), Confluent Kafka, data warehouse, Oracle, MS SQL, MongoDB, APIs, and OpenShift cluster platform.
  • Technology solutions architecture security, performance, availability, recoverability, and ensure cost savings/avoids of around USD 5 million per year by migrating to on-premises cloud, VMs, and container platforms.
  • Led cloud modernisation, Kubernetes/OpenShift engineering, enablement, and resiliency uplift across APAC and EMEA, supporting over 100 banking applications.
  • Implemented SRE standards (SLIs/SLOs, alerting, runbooks, error budgets, golden signals, and observability dashboards) for critical platforms.
  • Led a team of five technical architects delivering consumer banking platform, and infrastructure solutions.
  • Managed and monitored application infrastructure and services, ensuring system availability, performance, and resiliency in accordance with agreed SLA and RTO requirements.
  • Acted as the primary liaison between technology teams, business stakeholders, and external partners, supporting project planning, automation initiatives, and operational improvements.
  • Designed and implemented scalable hybrid cloud architectures leveraging Azure Virtual Machines, Azure Kubernetes Service (AKS), and Azure Red Hat OpenShift (ARO), integrated with on-premises platforms.
  • Architected and managed end-to-end infrastructure solutions across Azure SQL Database, Microsoft SQL Server, and Oracle Database, along with enterprise storage platforms including Azure Storage, Azure Files, and SAN FC storage, ensuring high availability, performance optimisation, and disaster recovery compliance.

Senior Infrastructure Architect

Optimum Solutions - ( Client CITI BANK)
Singapore
01.2017 - 03.2020
  • Designed highly available, redundant cloud architectures, utilising IaaS, PaaS, and DBaaS for large-scale, mission-critical applications and high-transaction workloads of Citibank’s consumer banking platform.
  • Providing infrastructure solutions across a wide range of technologies and computer science domains, ideally including Distributed Computing, Cloud Computing, Big Data Architectures, SOA, and Micro Services.
  • Secured more than £30M in annual hardware, licensing, maintenance, space, and energy cost savings through a server virtualisation project (P to X) that reduced the physical server footprint to VMware servers.
  • Implemented CI/CD pipelines supporting gated deployments, automated testing, and blue/green strategies.
  • Collaborated with regional teams, vendors, and regulators to support business operations across Southeast Asia, and ensure compliance with local technology standards.
  • Coordinated incident management activities, including root cause analysis, impact assessment, and regulatory escalation, ensuring timely resolution and reporting.

Infrastructure SME

Sciente Consulting & Comtel ( Client - DBS )
Singapore
04.2015 - 12.2016
  • Drive the Problem management process, engaging with SMEs to identify RCA, identify and implement preventive actions to reduce the number of incidents.
  • Involved in improvements for the performance tuning, automating logs cleanup and startups.
  • Involved in end to-end implementation and delivery in terms of server provisioning, VM request, IP request, basic software installation, application software installation, hardening, backup schedule, Monitoring and Support.
  • Involved in optimization initiatives like WebSphere to JBoss and WebLogic to JBoss for the open source technology to align with cloud for the future adoption.

WebSphere Consultant

PENTA CONSULTING, UK ( Client SADAD/SAMA )
Riyadh
09.2013 - 03.2015
  • Oversaw the installation and configuration of IBM WebSphere Application Server 8.5, implementing clustering and SIB/JMS for efficient SCA application deployments through wsadmin scripts.
  • Directed the installation and configuration of IBM WebSphere Service Registry and Repository (WSRR) 8.0, ensuring proper execution of database scripts within a cluster topology.
  • Managed the installation and configuration of IBM Business Activity Monitoring (BAM) 8.0 and IBM WebSphere Process Server (BPM) 8.0, facilitating a robust deployment environment in cluster scope, with a reliable messaging architecture.
  • Deployed and managed XML, REST, and SOAP-based services on IBM DataPower Gateway, supporting enterprise-wide integration initiatives.

SR System Administrator

WIPRO Technologies ( Client - CITI Bank )
Singapore
08.2011 - 09.2013
  • Installing and configuring IBM WebSphere Portal 8.0, configuring the primary node with an external DB, creating a portal template for cluster usage, federating and clustering the primary node, configuring federated LDAP, and adding an additional node for a horizontal cluster.
  • Align with Change, incident, and problem management for implementing changes and resolving issues in the production environment.
  • Worked with the Continuity and Risk Management team to determine the perfect COB strategy for projects to stay in line with project cost.

Senior WebSphere Admin

EMERIO Globe Soft ( Client - CITI BANK)
Singapore
08.2007 - 08.2011
  • Assisted in the setup of RND/SIT infrastructure for application deployment in WebSphere.
  • Preparing the application's infrastructure setup document and performing application setup such as WebSphere installation, profile creation, JNDI, JMS, MQ configuration, Http server configuration, SSL configuration, Siteminder (SSO) configuration, and deployment support for new projects.
  • Resolving MQ-related issues such as channels, QManager status, and SIB-related issues.

Sr. Engineer

ZONIAC Premium and SMS
07.2002 - 08.2007
  • Supported WebSphere administration and application deployment activities.
  • Assisted in monitoring and troubleshooting application server performance.
  • Helped set up nodes, data sources, and virtual hosts configurations.

Education

Master of Computer Applications (MCA) -

Arul Anandar College - Madurai Kamaraj University

Bachelor of Science in Computer (B.Sc.) -

St Joseph’s College - Bharathidasan University

Skills

  • Cloud Architecture: AWS, Azure
  • Platforms: Kubernetes, OpenShift, and Docker
  • DevOps: Terraform, Ansible, GitOps, Maven, Jenkins, Tekton, JFrog, SonarQube
  • SRE: SLIs/SLOs, Error Budgets, Prometheus, Grafana, and Splunk
  • Middleware: WebSphere ND, IBM BPM, IBM BAM, WebLogic, MQ, Tomcat, and JBoss
  • Database : Oracle, MSSQL , Mongo DB , Postgresql
  • Architecture: Microservices, Event-Driven Systems, Distributed Tracing
  • Infrastructure design
  • Capacity planning
  • Cost optimization
  • Team leadership

Certification

  • WebSphere Network Deployment V6.1 Core Administrator Certified
  • AWS Certified Solutions Architect – Associate
  • SRE Foundation

Key Achievements

  • Reduced cloud spend by 22% through modernization & cost optimization.
  • Accelerated cloud migration by 40% using reusable automation frameworks.
  • Migrated 100+ workloads from PCF → OpenShift with standardized patterns.
  • Decreased Sev1/Sev2 incidents by 30% via SRE frameworks & observability dashboards.

Timeline

Infrastructure Senior Tech Analyst

CITI BANK
03.2020 - Current

Senior Infrastructure Architect

Optimum Solutions - ( Client CITI BANK)
01.2017 - 03.2020

Infrastructure SME

Sciente Consulting & Comtel ( Client - DBS )
04.2015 - 12.2016

WebSphere Consultant

PENTA CONSULTING, UK ( Client SADAD/SAMA )
09.2013 - 03.2015

SR System Administrator

WIPRO Technologies ( Client - CITI Bank )
08.2011 - 09.2013

Senior WebSphere Admin

EMERIO Globe Soft ( Client - CITI BANK)
08.2007 - 08.2011

Sr. Engineer

ZONIAC Premium and SMS
07.2002 - 08.2007

Master of Computer Applications (MCA) -

Arul Anandar College - Madurai Kamaraj University

Bachelor of Science in Computer (B.Sc.) -

St Joseph’s College - Bharathidasan University
EDWIN NOEL RAJARATHINAM