DILANTHA NANAYAKKARA

Senior Engineering Analyst & Technical Leader
Specializing in enterprise transformations, API migrations,
and high-performance system architecture

20+
YEARS
50+
PROJECTS
15+
TEAMS LED
80%+
TEST COVERAGE

About

With over two decades of experience transforming complex technical challenges into scalable business solutions, I specialize in system migrations, performance optimization, and API-driven architectures for enterprises navigating digital transformation.

Currently leading critical infrastructure migrations at one of Australia's largest financial institutions (NAB), I bring deep expertise in Java, Spring Boot, microservices, and cloud technologies. My approach combines technical excellence with practical business value delivery.

Throughout my career, I've consistently delivered dramatic performance improvements—transforming processes from 20+ minutes to seconds, achieving 100x speed improvements, and building systems that handle millions of transactions reliably.

Experience Summary

Over two decades of progressive technical leadership across financial services, sports technology, e-commerce, and telecommunications.

ENTERPRISE TRANSFORMATIONS

Led critical infrastructure migrations for major banks including NAB, ANZ, Macquarie Bank, and IAG. Successfully transitioned white-label systems (e.g., Citi credit cards to NAB), designed API migration strategies, and delivered 24+ high-impact microservice endpoints handling millions of transactions. Implemented PCI compliance initiatives and built secure payment integrations.

PERFORMANCE ENGINEERING

Consistently achieved 10-100x performance improvements across systems. Transformed 20-minute processes to 20-second operations at Catch.com.au by optimizing batching and reducing payloads. Optimized batch processing from 20 minutes to under 5 minutes for Circuit City using Java and SQL. Built clustered messaging gateways at SMSGlobal handling millions of messages with custom rule engines.

TECHNICAL LEADERSHIP

Provided hands-on leadership for teams ranging from 2 to 20+ engineers. Mentored developers through pair programming and established technical documentation standards. Collaborated with cross-functional teams of business analysts, API designers, and testers. Supported the adoption of modern development practices including CI/CD pipelines, comprehensive testing strategies (achieving 80%+ coverage), and AI-assisted development workflows.

INNOVATION & ARCHITECTURE

Architected IoT device provisioning systems using AWS IoT at Catapult Sports. Pioneered custom rule engines using Spring Expression Language for SMS routing at SMSGlobal. Built media management systems with Drupal, and implemented centralized logging solutions using the ELK stack. Early adopter of cloud technologies with extensive AWS, Docker, and Terraform experience.

Technical Expertise

BACKEND

Java 11/17Spring BootMicronautMicroservicesREST APIsPHPSymfonySMPP

CLOUD & DEVOPS

AWSDockerTerraformGitLab CIECSIoTSQSEC2

DATABASES

PostgreSQLMySQLElasticsearchActiveMQSQL

FRONTEND

Vue.jsReact

Services

SYSTEM MIGRATION & MODERNIZATION

Expert guidance for transitioning legacy systems to modern architectures. Specializing in API migrations, microservices transformation, and cloud adoption strategies.

  • White-label system integration
  • Monolith to microservices migration
  • API gateway implementation
  • Legacy system decommissioning

PERFORMANCE OPTIMIZATION

Dramatic performance improvements through systematic analysis, optimization, and architectural refinements. Proven track record of 10-100x improvements.

  • Database query optimization
  • Caching strategy implementation
  • Batch processing enhancement
  • System bottleneck analysis

TECHNICAL LEADERSHIP & MENTORING

Hands-on technical leadership for development teams. Establishing best practices, mentoring developers, and driving adoption of modern development methodologies.

  • Team mentoring and upskilling
  • Code quality initiatives
  • CI/CD pipeline implementation
  • Agile process refinement

Contact

Available for permanent positions, consulting engagements, and contract opportunities. Based in Melbourne, Australia, with flexibility for remote collaboration.