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I am a backend-focused software engineer with 8+ years of experience delivering scalable systems for financial services and large platforms. I specialize in designing robust architectures using TypeScript, Node.js, and microservices, and I enjoy optimizing performance and security. I collaborate with cross-functional teams to turn complex problems into reliable software. I value clean code, testing, and continuous delivery, and I’m committed to mentorship, knowledge sharing, and building high-quality products.…I am a backend-focused software engineer with 8+ years of experience delivering scalable systems for financial services and large platforms. I specialize in designing robust architectures using TypeScript, Node.js, and microservices, and I enjoy optimizing performance and security. I collaborate with cross-functional teams to turn complex problems into reliable software. I value clean code, testing, and continuous delivery, and I’m committed to mentorship, knowledge sharing, and building high-quality products.

Kumaranath Fernando

Full Stack Developer, Back-End Developer, Front-End Developer, +3

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I am a backend-focused software engineer with 8+ years of experience delivering scalable systems for financial services and large platforms. I specialize in designing robust architectures using TypeScript, Node.js, and microservices, and I enjoy optimizing performance and security. I collaborate with cross-functional teams to turn complex problems into reliable software. I value clean code, testing, and continuous delivery, and I’m committed to mentorship, knowledge sharing, and building high-quality products.…I am a backend-focused software engineer with 8+ years of experience delivering scalable systems for financial services and large platforms. I specialize in designing robust architectures using TypeScript, Node.js, and microservices, and I enjoy optimizing performance and security. I collaborate with cross-functional teams to turn complex problems into reliable software. I value clean code, testing, and continuous delivery, and I’m committed to mentorship, knowledge sharing, and building high-quality products.

Available to hire

I am a backend-focused software engineer with 8+ years of experience delivering scalable systems for financial services and large platforms. I specialize in designing robust architectures using TypeScript, Node.js, and microservices, and I enjoy optimizing performance and security.

I collaborate with cross-functional teams to turn complex problems into reliable software. I value clean code, testing, and continuous delivery, and I’m committed to mentorship, knowledge sharing, and building high-quality products.

Skills

Experience Level

Expert

Expert

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Expert

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer at Sandstone Technologies

May 1, 2023 - Present

Senior Software Engineer delivering financial solutions to Australia’s largest banks. Led the development and optimization of Node.js-based microservices to enhance loan origination, achieving a 30% reduction in processing time through database query optimization and improved algorithms. Refactored front-end workflows with React to improve UX and reduce latency. Collaborated with cross-functional teams to identify bottlenecks and implement scalable solutions. Strengthened data protection by identifying and mitigating PI/PII vulnerabilities, and automated security testing with OWASP ZAP and Burp Suite, cutting vulnerability detection time by 10%.

Senior Software Engineer at Tyro

August 1, 2022 - May 31, 2023

Architected and implemented Tyro Connect Pay API using Node.js and React to support 5,000 merchants. Improved API throughput by 40% and enabled concurrent processing of over 100,000 payment requests with 99.99% success rate. Achieved PCI compliance for Google Pay and Apple Pay and integrated VGS proxy APIs to securely alias sensitive data, reducing security incidents by about 50%.

Senior Software Engineer at hipages

September 1, 2021 - July 31, 2022

Rearchitected legacy job assignment daemon and tradie job lead pricing strategy. Redesigned and modularized the backend with NestJS, TypeScript, and React, cutting lead assignment time by 50% and increasing marketplace efficiency by 40%. Implemented a dynamic pricing model that boosted revenue by 20% within months.

Senior Full Stack Developer at Thitsaworks

September 1, 2017 - August 31, 2021

Migrated critical backend components from a monolithic ASP.NET framework to a microservices architecture using Node.js and React, enabling scalable processing of ~20 million lender records. Leveraged AWS for auto-scaling and fault tolerance, improved performance with multi-threading and Redis caching, and adopted event-driven patterns to shorten release cycles by 30%.

Software Engineer at Google Summer of Code

April 1, 2017 - September 1, 2018

Contributed as a Software Engineer in Google Summer of Code, working on open-source projects; implemented features and improved code quality across modules, gaining exposure to distributed systems and remote collaboration.

Software Engineer at IFS

June 1, 2016 - July 31, 2017

Software Engineer at IFS, involved in developing and maintaining enterprise software components in Colombo, Sri Lanka.

Software Engineer at Virtusa

June 1, 2015 - June 30, 2016

Software Engineer at Virtusa, Colombo, Sri Lanka; contributed to web applications and backend services.