Pubudu Wijerathna
Senior SRE
Haarlem
Summary
Results-driven Systems Engineer with 12+ years of experience designing, deploying, and operating mission-critical virtualization, hybrid-cloud, and containerized platforms. Proven track record leading global, cross-functional teams through end-to-end infrastructure lifecycles, ensuring high availability, zero-downtime operations, and robust incident response.
Overview
9
9
Certifications
14
14
years of professional experience
Work History
Senior Systems Reliability Engineer
Nutanix
01.2022 - Current
- Define, measure, and defend Service Level Objectives, Service Level Indicators, and error budgets across production control planes, cloud control portals, and telemetry pipelines.
- Design and maintain monitoring, distributed tracing, and alerting stacks to provide deep visibility into service health and cluster performance.
- Participate in on-call rotations to triage, mitigate, and resolve high-severity production incidents. Lead blameless post-mortems to identify architectural weaknesses and ensure preventive actions are implemented.
- Facilitated knowledge transfer sessions and provided mentoring to internal teams and peers to enhance their skills.
- Analyzed resource consumption patterns (CPU, IOPS, latency, network bandwidth, distributed metadata load) to project scaling requirements and optimize infrastructure footprint for improved service reliability.
Senior Systems Engineer
Pearson Lanka
04.2017 - 11.2021
- Assisted in application deployments to the production environment.
- Infrastructure management using Terraform.
- Base image automation for ActiveLearn Secondary application using DockerFile.
- Worked with Elastic Container Registry for Docker Image management.
- Certificate renewal done through AWS ACM and Apache.
- Automation instance creation and package installing through AWS chef 11 and 12 versions.
- Working with AWS RDS and monitoring through cloudwatch.
- Infrastructure management using Terraform.
- Managed and maintained on-premise vCloud and virtualization environments for Pearson, overseeing 25+ vCenters, 800+ ESXi hosts, and 25,000+ virtual machines.
- Troubleshot technical incidents and performed root cause analysis for major incidents, identifying preventive actions to enhance system reliability.
- Researched current trends in virtualization and their use cases within Pearson infrastructure, forecasting technical developments in the virtualization domain.
- Integration to Microsoft Teams, to alert us of necessary alerts/incidents/notifications.
- Setting up of load injector setup to facilitate Perf testing.
- Custom AMI creation facilitated using Packer in order to use the latest Amazon provided AMI in
instances.
Associate Systems Engineer
KBSL Information Technologies LTD
02.2013 - 04.2017
- Designing, Implementing & upgrading Virtual desktop infrastructure solution for major Sri Lankan Clients.
- Implemented and upgraded virtual desktop infrastructure solutions for major Sri Lankan clients, enhancing accessibility and user experience.
- Executed platform OS implementation, upgrades, and troubleshooting, managing domain controllers, SQL Servers, and Windows servers.
- Collaborated with HCI solutions like VxRail to enhance system capabilities.
- Provided end user support to internal customers.
Skills
- Cloud & Virtualization
- AI enthusiastic
- System Internals & Networking
- Training and mentoring
- Data center operations
- Automation tools
- Incident management
- Infrastructure management
- Monitoring tools
- Server hardware
- Continuous improvement
- Microservices architecture
- Technical support
Certification
Red Hat Certified System Administrator
Timeline
Senior Systems Reliability Engineer
Nutanix
01.2022 - Current
Senior Systems Engineer
Pearson Lanka
04.2017 - 11.2021
Associate Systems Engineer
KBSL Information Technologies LTD
02.2013 - 04.2017