Sampath Karunaratne
Lead Site Reliability Engineer @lululemon
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WORK HISTORY
Lead Site Reliability Engineer @lululemon
Vancouver, BC, CA
Domain: Digital & eCommerceRole Overview: As a Lead DevOps & Site Reliability Engineer, I drive product roadmaps and reliability strategies for large-scale digital and eCommerce platforms. I combine strategic leadership with hands-on technical execution to improve resilience, scalability, cost efficiency, and operational excellence.I lead research initiatives and Proof of Concepts (POCs) to support innovation and tool selection, proactively monitor system health and trends, and provide data-driven recommendations for continuous improvement. I also lead an Engineering Community of Practice, advancing DevOps maturity, automation, and production-grade standards across teams.Key Contributions:• Led migration of CI/CD pipelines from Travis CI and GitHub Actions to GitLab CI/CD, developing reusable templates and Terraform modules aligned with enterprise standards.• Designed engineering maturity frameworks and Readiness for Service (RFS) checklists to strengthen operational governance and platform reliability.• Optimized AWS cloud costs through usage analysis, design-phase recommendations, and implementation of governance guardrails and Service Catalog products.• Designed resiliency and disaster recovery frameworks aligned with RPO/RTO and business criticality.• Built standardized local build, test, scan, and deploy environments for microservices and Terraform across macOS and Windows platforms.• Implemented AI-assisted incident prioritization and intelligent chatbots using Amazon Web Services Bedrock, Claude Sonnet 4.5, Amazon Titan Embeddings, and RAG/CAG architectures, significantly reducing RCA timelines and improving incident response efficiency.
EDUCATION
Caltech
Postgraduate Program in DevOps, DevOps
BCS, The Chartered Institute for IT
Professional Graduate Diploma, Information Technology
University of Colombo
Bachelor of Science (BSc), Physical Science
BCS, The Chartered Institute for IT
Diploma, Information Technology
BCS, The Chartered Institute for IT
Certificate, Information Technology
SKILLS
ABOUT SAMPATH KARUNARATNE
With over 15 years of experience, I currently serve as a Lead Site Reliability Engineer at lululemon, specializing in developing and executing reliability strategies for large-scale digital and eCommerce platforms. I combine leadership and technical expertise in DevOps, CloudOps, and Site Reliability Engineering to enhance system resilience, scalability, and operational efficiency. My role includes spearheading Proof of Concepts (POCs), monitoring system health, and providing data-driven recommendations to drive continuous improvement. At lululemon, my mission is to modernize digital platforms by fostering DevOps maturity, advancing automation practices, and implementing production-grade engineering standards. Through collaboration and strategic execution, I aim to enable operational excellence, improve platform stability, and support the organization’s broader digital transformation goals.
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