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Nalaka Ariyarathna

@nalakaariyarathna

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Senior Java backend engineer specializing in Spring Boot microservices.

Sri Lanka

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What I'm looking for

I seek senior Java backend roles working on microservices, platform upgrades, and cloud-native deployments with collaborative teams, opportunities to mentor, and hands-on production impact.

I am a Senior Java backend engineer with 16+ years building and modernizing enterprise applications, primarily using Java, Spring Boot and Spring Cloud in microservice architectures. I have led teams, mentored juniors, and driven complex upgrades—Java 8 to 17, Spring Boot 1.x to 3.x and Hibernate 5 to 6—delivering production support, deployments and stability improvements.

I excel at designing APIs, troubleshooting deployments in Kubernetes, and integrating authentication (Keycloak) and messaging systems (RabbitMQ, Kafka). I consistently contribute to CI/CD, database migrations (Liquibase), performance tuning and knowledge transfer while collaborating directly with clients and cross-functional teams.

Experience

Work history, roles, and key accomplishments

Project Lead

Persistent Systems Pvt Ltd

Jun 2023 - Sep 2025 (2 years 3 months)

Led Java backend development and upgrades (JDK8→17, Spring Boot 1.2→3.x, Hibernate 5→6.3), resolved deployment and clustering issues, and supported platform feature delivery and production support for Majesco Digital1st, improving platform stability and deployment reliability.

Spring Boot Spring Cloud Hibernate Keycloak Kubernetes WildFly PostgreSQL Git

Technical Lead – Java Backend

IIHSolutions Pvt Ltd

Feb 2022 - Jun 2023 (1 year 4 months)

Led backend microservice development for an end-to-end hospital management system using Spring Boot/Spring Cloud, delivered features, CI/CD support, and production/UAT bug fixes while managing task distribution and hiring.

Java 8 Spring Boot Spring Cloud RabbitMQ Kafka MySQL Redis Docker Jenkins

Lead Consultant

Virtusa Pvt Ltd

Nov 2019 - Feb 2022 (2 years 3 months)

Served as lead backend consultant for conversational IVR and enterprise integrations, implemented Spring Boot microservices, GQL/backend bindings, and led client interactions, release planning and end-to-end testing.

Java 8 Spring Boot GraphQL Junit PostgreSQL Git Docker CI CD

Senior Consultant

Virtusa Pvt Ltd

Feb 2019 - Aug 2019 (6 months)

Owned Java backend microservices for HCSC contract admin automation, providing API support to Pega teams, troubleshooting, and implementing business rules to improve document generation reliability.

Java Spring Boot Junit Mockito SQL Server Microservices Git

Senior Consultant

Virtusa Pvt Ltd

Apr 2018 - Dec 2018 (8 months)

Improved unit test coverage and developed Spring Boot microservices for MetLife GSSP, delivering endpoints, CI/CD deployments, and mentoring engineers to raise code quality.

Java Spring Boot Docker MongoDB Spock Groovy Bamboo Bitbucket Jira

Senior Consultant

Virtusa Pvt Ltd

Apr 2015 - Dec 2017 (2 years 8 months)

Maintained and enhanced order management and portal systems (SORB, TCP, RICA), performed L3 production support, migrations, performance tuning, and guided junior engineers.

Java 8 Oracle Weblogic JMS SOAP Maven JDBC Performance Tuning Release Management

Senior Engineer

Virtusa Pvt Ltd

Jan 2012 - Dec 2014 (2 years 11 months)

Designed and implemented disbursement modules for Citigroup GTS, handled client interactions, performance optimization, and production support for global payment workflows.

Java Oracle JDBC JMS Volante Unit Testing Performance Tuning SVN

Senior Engineer

Virtusa Pvt Ltd

Jan 2009 - Dec 2011 (2 years 11 months)

Developed Java middle-tier and Flex integrations for Citigroup Self Service portal, delivered search and dynamic UI frameworks, and provided training and mentorship to team members.