Nadith Premaratne
I'm a Lead Software Engineer
About
Lead Software Engineer with of experience in Java/Kotlin, Spring ecosystem, microservices, and real-time payment systems for clients like Google, Visa, NETS, Disney, and London Stock Exchange.
Lead Software Engineer (Java/Kotlin)
Passionate about building scalable, secure, and maintainable systems. Experienced in microservice architecture, distributed systems, AWS, and mentoring teams. Exploring AI/ML engineering with LangChain.
- Birthday: 24 September 1992
- Website: nadithm.github.io/nadith
- Phone: +65 82007254 / +94 771819075
- City: Singapore
- Age:
- Degree: Bachelor
- Email: nadith@google.com / nadith.sg@gmail.com
- Freelance: Available
Recipient of Dream Team Award and Vanguard Award for exemplary performance, engineering excellence, and contributions to the Google Fiber Project and other key initiatives.
Problem Solver
I love turning complex challenges into elegant, effective solutions.
Engineering Mindset
Committed to building reliable, scalable systems that last.
AI/ML Enthusiast
Passionate about integrating machine learning into real-world products.
Collaborative Leader
Driven by mentoring teams and fostering open, productive collaboration.
Skills
Experienced in building robust backend systems, scalable microservices architectures, messaging systems, and cloud deployments. Passionate about quality code and continuous learning.
💻 Languages
🧩 Frameworks & Libraries
☁️ Cloud & DevOps
🎨 Frontend
📡 Messaging & Infrastructure
🗄️ Databases & In-Memory Distributed Caching
🛠️ Tools
📜 Resume
🌟 Profile Summary
Nadith Premaratne
Lead Software Engineer with of experience delivering enterprise-grade
solutions for
world-class clients including Disney, London Stock Exchange, NETS, Visa, and Google. Recognized with
the Dream Team and Vanguard Awards for engineering excellence and leadership on the Google Fiber
Project.
Specialized in real-time payments, banking systems, and server-side development using Java/Kotlin
and the Spring ecosystem. Highly experienced in microservices architecture, distributed systems, and
secure, scalable enterprise solutions. Currently exploring AI/ML with the LangChain framework for
intelligent application development.
- Singapore
- 📞 +65 82007254
- ✉️ nadith.sg@gmail.com
- 🌐 Portfolio
🎓 Education
Bachelor of Science (Hons) in Engineering
2014 - 2017
University of Peradeniya, Sri Lanka
First-class honours (GPA: 3.75/4.00), specialized in Computer Engineering.
💼 Professional Experience
- Led Singapore backend team to transform Google Fiber’s monolithic architecture into scalable microservices.
- Designed clean, maintainable code for customer apps, backend systems, and network tools.
- Performed in-depth Java/Kotlin code reviews, enforcing best practices.
- Collaborated with cross-functional teams to deliver high-quality solutions.
- Mentored junior engineers, fostering growth and knowledge sharing.
- Actively participated in agile ceremonies for efficient delivery.
- Technologies: Java, Spring, Kotlin, Angular, gRPC, Harness CICD, GitHub, OpenAPI, JIRA.
- Redesigned Visa Checkout architecture for mobile-as-identity integration.
- Integrated new Identity Management APIs for enhanced security.
- Developed reactive, non-blocking REST APIs with microservice integration.
- Enforced code quality, security, and performance standards.
- Built and maintained CI/CD pipelines with Git, Ansible, Jenkins.
- Technologies: Spring, JPA, Hibernate, REST, Oracle, OpenShift, Git, Jenkins.
- Architected and developed PromptPay–PayNow cross-border linkage for instant bank transfers.
- Performed technical studies, built low-latency real-time payment systems.
- Designed home-grown distributed caching, service discovery, and fault-tolerant transaction flows.
- Led industry testing with Singapore and Thailand stakeholders.
- Tech Stack:
Java 17
Spring Ecosystem
Ignite / GridGain
ISO 20022
Solace
Kafka
IBM-MQ
AWS
Docker
Jenkins
REST
Oracle PL/SQL
Jira
- Developed TravelBox™ for clients like Disney.
- Built scalable REST/SOAP APIs and desktop solutions.
- Optimized in-memory caching for low-latency responses.
- Supported production systems with analysis and hot-fixes.
-
Tech Stack:
Java 11
Spring Ecosystem
Hazelcast
IBM-MQ
AWS
Docker
Jenkins
GitLab
REST
SOAP
Apache Velocity
Oracle PL/SQL
Jira
- Designed load-balancing tools for risk calculation workflows.
- Contributed to enterprise trading platform development.
- Optimized Oracle queries and integrated testing.
- Tech Stack:
Java 11
Python
C/C++
Oracle PL/SQL
Jira
Bamboo
🛠️ Key Technical Skills
- Java/Kotlin: Spring (Boot, MVC, WebFlux), JPA, Hibernate, gRPC, REST, JUnit, Mockito
- Languages: Python, C/C++, LangChain Framework
- Databases: Oracle, MySQL, BigQuery, MongoDB, SQLite
- Caching: Apache Ignite, Hazelcast
- Messaging: Solace, Kafka, IBM MQ
- DevOps: Ansible, Jenkins, GitLab, Harness, Maven, Gradle, Docker, Kubernetes, OpenShift
- Cloud: AWS, GCP
- Front-End: Angular, React
🎖️ Certifications
🏅 Achievements & Activities
- Vanguard Award 2025 – Leadership and Excellence at Google Fiber
- Dream Team Award 2024 – Exceptional Contributions to Google Fiber Project
- Technical Content Creator at Nenathambara.org
- Captain – School Under-13 and Under-16 Cricket Teams
Portfolio
Welcome to my portfolio! Here you'll find a selection of projects that highlight my journey as a software engineer, architect, and AI enthusiast. I'm proud to share work that reflects my dedication to solving real-world challenges through technology.
- All
- Applications
- Insights & Articles
- Algorithms
Recommendations
Endorsements and recommendations shared on LinkedIn by colleagues and managers I've worked with on global engineering projects.
I have worked with Nadith at Google Fiber where I led Dev teams, Nadith was the one of the leads from Singapore site. He has a great attitude of digging deep into problems, finds solutions quickly and efficiently. Nadith also served as a SME for key functions and led other SWEs successfully. I highly recommend him as lead engineer to any team.
Henry Gengiti
Software Engineering Manager at Google · 2025
Nadith was part of my RND team working on new payment solutions and key technical team member of Prompt Pay PayNow linkage Project , Nadith was highly skilled, dedicated, self motivated , very technically strong resources. He is my go-to man for complex tasks , most of the time his deliver was beyond our expectations. He is very quick to pickup any domain, technical skills, . I will look forward to work with him in future whenever possible :). Thanks Nadith
Vijay Kumar K
Digital Transaction Architect, Vice President of Technology @ OCBC · 2021
I found Nadith to be a talented and a highly responsible individual, during the period I was working with him at Codegen International. He displayed dedication and commitment to all the tasks that were given and was a very good team player. Nadith is one of the teammates I could always count upon and I highly recommend him without any reservations.
Vindya Gunawardena
Technical Architect @ 99x · 2018
Nadith Worked with us during his internship period at MillennumIT and provided some significant and valuable contributions during this time. He is a quick learner and is enthusiastic about the work that he did. He developed several tools and reports that directly supported the product that we were developing at the time. Some of those tools are still being used today. He was able code in several languages and had good knowledge regarding RDBMSs. He was specially pro-active and eager to work on new things. He is highly recommended.
Dishan Metihakwala
Technical Architect @ Accenture UK & Ireland · 2016
Nadith joined MillenniumIT as an intern and showed great potential. He is a good mix between quality and quantity side of development work. He supported the risk team on building tools to automate some engineering practices, data analytics when we were building the risk management system. He has matured and grown during his internship. His ability to learn on his own and work alone as well as be involved in team, I believe is a strength that will take him far in his career. I wish him the the best in his long career ahead.
Kasun Abeygunawardene
Director of Software Engineering @ Q4US · 2016
Contact
Get in touch to discuss your project, collaboration, or any questions you have
Address
Treasure @ Tampines, Singapore
Call Me
+65 82007254
Email Us
nadith.sg@gmail.com