Case Studies

Case studies that demonstrate how I approach complex problems, make technical decisions, and deliver measurable impact. Each project tells the story of the challenge, the constraints, the decisions made, and the outcomes achieved.

18 projects · 5 featured

OUSL Job Portal
Featured
System Architect · 2025 OUSL Job Portal Enhanced the university's digital presence and simplified the job-seeking journey for thousands of students
PHPMySQLBootstrapJavaScript +1
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Rebuilding the Payment System
Featured Ongoing
Lead Engineer · 2026 Rebuilding the Payment System Reduced payment processing time by 60% and improved reliability to 99.9% uptime
Node.jsTypeScriptPostgreSQLRedis +3
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Agromate - Tea Cultivation Diagnostic Platform
Featured
Lead Full-Stack Developer · 2024 Agromate - Tea Cultivation Diagnostic Platform Empowered planters with real-time data, reducing crop loss and manual errors
PHPMySQLJavaScriptBootstrap +2
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Real-Time Analytics Dashboard
Featured
Full-Stack Engineer · 2025 Real-Time Analytics Dashboard Built a real-time analytics platform processing 100K+ events per second with sub-second latency
ReactTypeScriptNode.jsKafka +3
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API Gateway Migration
Senior Backend Engineer · 2024 API Gateway Migration Migrated 50+ microservices to a unified API gateway, reducing latency by 40% and improving developer experience
KongLuaPostgreSQLPrometheus +2
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SLT-MOBITEL Digital Labs - DevOps & Observability
Featured
DevOps & Observability Intern · 2025 SLT-MOBITEL Digital Labs - DevOps & Observability Provided sub-second visibility into system health, reducing MTTR (Mean Time to Recovery)
DockerPrometheusGrafanaLinux +2
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Rocklanka Travel Company Website
Full-Stack Developer · 2024 Rocklanka Travel Company Website Delivered a complete travel platform that increased client bookings and online visibility
HTML5CSS3JavaScriptPHP +2
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E-commerce Search Infrastructure
Senior Backend Engineer · 2024 E-commerce Search Infrastructure Rebuilt search infrastructure handling 10M+ queries/day, improving relevance scores by 45% and reducing p99 latency to under 100ms
ElasticsearchPythonDebeziumKafka +3
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Developer Platform & CI/CD Modernization
Platform Engineer · 2023 Developer Platform & CI/CD Modernization Built internal developer platform that reduced deployment time from 45 minutes to 8 minutes and increased deployment frequency by 300%
ArgoCDBackstageGitHub ActionsKubernetes +4
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Wathsalamaduwanthi LMS - Tuition Management System
Full-Stack Developer · 2024 Wathsalamaduwanthi LMS - Tuition Management System 70+ active students using the platform daily for online learning and assignment submissions
PHPMySQLJavaScriptBootstrap +2
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DD AC Repair Center - Service Booking System
Full-Stack Developer · 2024 DD AC Repair Center - Service Booking System Streamlined appointment scheduling and improved customer service response time
PHPMySQLJavaScriptBootstrap +2
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Multi-Channel Notification System
Senior Backend Engineer · 2023 Multi-Channel Notification System Built unified notification platform handling 50M+ notifications/day across email, push, SMS, and in-app channels with 99.95% delivery rate
GoApache KafkaPostgreSQLRedis +4
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Data Pipeline Migration to Real-Time
Archived
Data Engineer · 2022 Data Pipeline Migration to Real-Time Migrated batch data pipelines to real-time streaming, reducing data freshness from 24 hours to under 5 minutes
Apache FlinkApache KafkaDelta LakeAWS S3 +4
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Sri Sudharmarama Vidyayathana Pirivena - School Website
Web Developer · 2024 Sri Sudharmarama Vidyayathana Pirivena - School Website Website officially inaugurated at Seethawakapura Town Hall by Ven. Kirinde Assaji Nayaka Mahimi Thero
HTML5CSS3JavaScriptPHP +2
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Enterprise Authentication Platform
Archived
Tech Lead · 2022 Enterprise Authentication Platform Built a centralized auth platform serving 12 applications with SSO, reducing login friction by 70%
GoPostgreSQLRedisLDAP +3
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DTM Technologies UAE - Corporate Website
Web Designer · 2024 DTM Technologies UAE - Corporate Website Delivered a professional online presence for the UAE-based technology company
HTML5CSS3JavaScriptBootstrap +2
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ERP & Inventory Management System
System Architect · 2025 ERP & Inventory Management System Streamlined business operations with real-time inventory visibility and automated workflows
PHPMySQLJavaScriptBootstrap +3
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Dr. Chamila Dias Portfolio - Academic Website
Web Developer · 2024 Dr. Chamila Dias Portfolio - Academic Website Delivered a professional online presence highlighting academic credentials and research work
HTML5CSS3JavaScriptPHP +2
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