Pujitha Nilanka Vithana Pathirana
Global Performance & Observability Engineering Lead Hsbc Open Banking @HSBC
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WORK HISTORY
Global Performance & Observability Engineering Lead Hsbc Open Banking @HSBC
London, GB
Improved Account Information API response times from >1s to ~400msReduced Payments API latency from >2s to <500msIncreased platform throughput and capacity by 6× with no increase in AWS costReduced incident investigation and resolution time by ~50% through end-to-end observabilityLead site reliability, observability, and performance engineering strategy for globally distributed Open Banking platforms.Define and implement SLOs, SLAs, and operational metrics for API-driven services.Design and operate full-stack observability using AWS CloudWatch, Datadog, AWS X-Ray and Splunk.Drive shift-left reliability practices, integrating performance and resilience checks into CI/CD pipelines.Support production operations, incident investigation, root cause analysis, and performance remediation.Provide technical leadership, mentoring, and capability building across geographically distributed teams.
EDUCATION
Asian Institute of Technology
Certificate, Database management systems
University of Colombo
Bachelor of Information Technology, Information Technology
Coventry University
Master of Business Administration - MBA
University of Cambridge
Certificate, Business English (ESOL)
SKILLS
ABOUT PUJITHA NILANKA VITHANA PATHIRANA
I am a Senior Site Reliability & Observability Engineering professional with over 21 years of experience building, assuring, and operating highly available, scalable, and performance-critical platforms in AWS and cloud-native environments, primarily within financial services and regulated domains.My expertise sits at the intersection of SRE, observability, performance engineering, and cloud reliability. I help organisations design systems that are measurable, resilient, and operationally excellent—using strong SLO/SLA practices, deep telemetry, and automation-first engineering.Currently at HSBC Open Banking, I lead global observability and performance engineering strategy across multiple regions (UK, EU, APAC, Middle East), supporting large-scale API-driven (over 500million API calls/month), distributed platforms running on AWS. I work closely with platform, DevOps, development and products teams to embed shift-left reliability, production-grade monitoring, and proactive performance assurance into the software lifecycle.Key impact & achievements:• Drove API response time improvements for Account Information services from >1 second to ~400 ms, significantly enhancing customer experience and meeting strict regulatory NFRs.• Reduced Open Banking Payments API latency from over 2 seconds to under 500 ms through performance tuning, architecture review, and targeted optimisation.• Increased overall platform capacity by 6× while keeping cloud infrastructure costs flat, through improved workload modelling, scalability tuning, and efficiency optimisation on AWS.• Introduced clear, end-to-end observability (metrics, logs, traces, dashboards), resulting in a ~50% reduction in incident investigation and resolution time, improving operational resilience and on-call effectiveness.What I specialise in:• Site Reliability Engineering (SRE): availability, latency, scalability, capacity, and resilience• Full-stack observability: metrics, logs, traces, dashboards, alerting & root cause analysis• AWS-native architectures: designing, tuning, and operating workloads at scale• Performance & reliability engineering for micro-services and APIs• SLO/SLA definition, measurement & reporting• Production readiness, release assurance & incident response• Mentoring and leading engineers across global teamsI am passionate about engineering systems that fail gracefully, scale predictably, and provide teams with clear operational signals to make fast, confident decisions in production.
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