Technology Leader with 16+ years of experience architecting scalable, resilient enterprise systems across the full SDLC. Deep expertise in Java and Python stacks, hands-on system design (HLD/LLD), and enterprise-grade Generative AI — including LLMs, RAG pipelines, AI Agents, MCP, A2A communication, and multi-agent orchestration. Proven ability to mentor teams and align technology solutions with business objectives across logistics, IoT, finance, insurance, and government domains.

• 🎓 Education: BSc in Information Technology, University of Moratuwa, Sri Lanka
• 📍 Location: Singapore
• 💬 Ask me about: Java · Python · Spring Boot · FastAPI · System Design · GenAI / LLM · RAG · MCP · Microservices · Cloud Architecture
• 🌐 Blog: pradeepkrathnayaka.blogspot.com

Practical, production-proven experience designing and evolving complex distributed systems across enterprise domains. Skilled in both High-Level Design (HLD) and Low-Level Design (LLD), with deep knowledge of modern architecture patterns.

Solid track record across the full SDLC — from solution architecture to production deployment — in high-performance enterprise environments spanning logistics, IoT, finance, insurance, payments, government and e-procurement.

• Scalable microservices with Java 8, 11, 17, 21, 25 and Spring Boot
• Robust REST API development with API-First design principles (OpenAPI / Swagger)
• Reactive, non-blocking systems with Spring WebFlux
• Secure services with Spring Security, OAuth2, JWT, OpenID Connect
• Integration via REST, SOAP, JMS, IBM MQ, WebSocket, MQTT
• Message streaming with Apache Kafka and RabbitMQ

• DDD-based microservices with bounded contexts, aggregates and domain events
• Clean Architecture and Hexagonal Architecture implementations
• Event-Driven Architecture leveraging CQRS, Event Sourcing and SAGA patterns
• Architecture documentation and technical validation using C4 Model
• Technical POCs and proof-of-concept to architectural decision records

• Enterprise messaging with Apache Kafka and RabbitMQ
• Enterprise systems integration (REST, SOAP, JMS, IBM MQ, MQTT)
• Asynchronous and synchronous communication strategy design
• Real-time data streaming and end-to-end ML data pipeline engineering

• AWS, Azure, GCP — cloud-native architecture, design and deployment
• Containerization with Docker and orchestration with Kubernetes
• CI/CD pipelines with Jenkins, Azure DevOps, GitHub Actions
• Reverse proxies and web servers: Nginx, Apache HTTP Server

• Test-Driven Development (TDD) — unit, integration and contract testing
• JUnit 5, Mockito, Testcontainers, Playwright, pytest, unittest, locust
• Performance and load testing with JMeter
• Code quality enforcement with SonarQube and Clean Code principles
• Applied TDD and DDD consistently across enterprise-grade projects in logistics, finance, insurance, and government domains