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Lead Full Stack Software Engineer with over nine years of experience in developing backend infrastructures utilizing TypeScript, Node.js, and AWS. Recognized for pioneering an architecture that optimized transaction speeds, resulting in a significant reduction of latency up to 30%. Promoted as Lead Software Engineer due to exceptional performance and impact on project outcomes.…

Ruslan Gunawardana

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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Lead Full Stack Software Engineer with over nine years of experience in developing backend infrastructures utilizing TypeScript, Node.js, and AWS. Recognized for pioneering an architecture that optimized transaction speeds, resulting in a significant reduction of latency up to 30%. Promoted as Lead Software Engineer due to exceptional performance and impact on project outcomes.…

Available to hire

Lead Full Stack Software Engineer with over nine years of experience in developing backend infrastructures utilizing TypeScript,
Node.js, and AWS. Recognized for pioneering an architecture that optimized transaction speeds, resulting in a significant reduction of
latency up to 30%. Promoted as Lead Software Engineer due to exceptional performance and impact on project outcomes.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Full Stack Software Engineer at Viseven

April 1, 2025 - February 1, 2026

Contributed to the development and enhancement of the eWizard Content Experience Platform, enabling scalable content customization and multi-channel delivery (email and in-app notifications) for enterprise marketing workflows. Upgraded frontend components, improving content customization workflows and reducing content creation time by 30%. Enhanced backend services to support content personalization and multi-channel delivery, increasing content deployment reliability by 40% and modernizing APIs and data handling.

Senior Full Stack Software Engineer at EPAM Systems

August 1, 2024 - April 1, 2025

Led backend modernization for the D2L LMS used by the Canadian Red Cross, improving performance, reliability, and scalability for online and blended trainings. Rebuilt core services with Express.js, reducing API response times by 40%+, migrated to PostgreSQL with redesigned schemas, boosting query performance by 35% and ensuring zero data loss during migrations. Introduced Jest unit tests and end-to-end test coverage (85%+), stabilizing releases and deploying on AWS.

Full Stack Software Engineer at Freelance

May 1, 2024 - August 1, 2024

Developed a Resource Management System for a mid-sized car wash chain, reducing manual processing time. Established domain-focused collaboration, delivering a real-time dashboard (React, Next.js) processing 10K+ data points for indicators; integrated CI/CD pipelines with Docker/Kubernetes to accelerate deployments.

Senior Frontend Software Engineer at Winstars.AI

January 1, 2024 - May 1, 2024

Built AI-driven conversational systems with real-time interactions; launched robust chatbots handling 100K+ messages daily. Collected user feedback to improve usability, increasing customer satisfaction by 40%; redesigned app navigation to reduce first-time task completion time by ~30%. Architected scalable AWS cloud infrastructure to support real-time processing for e-commerce with 1M+ transactions monthly.

Lead Full Stack Software Engineer at Trendformer

August 1, 2021 - December 1, 2023

Specialized in backend development for an ecommerce app with social features. Built backend for 40K+ users and 20K+ daily transactions; implemented BullMQ for 100K+ tasks/day; designed Apollo GraphQL APIs reducing data fetching time by 40%; implemented real-time notifications and Firebase authentication; optimized Redis for load reduction across multiple scenarios.

Lead Full Stack Software Engineer at Freelance

May 1, 2021 - July 1, 2021

Led development of the HypeGame matchmaking service with a team of 23; built real-time player matching for 13K+ DAU; optimized Prisma-based REST queries to support four concurrent requests without degradation; built optimized UI with React/Next.js, reducing load times by ~30%.

Lead Front End Software Engineer at CodeRiver

February 1, 2018 - April 1, 2021

Led frontend for a decentralized crypto exchange, enabling secure transactions for 1,500+ users; promoted to Lead Front End; implemented agile processes; delivered crypto-based game with 50K+ concurrent users.

Lead Full Stack Software Engineer at Ineffable Innovations

September 1, 2017 - January 1, 2018

Led a team of 4 on an AI-powered app for microcomputer using Python and web frontend with React; integrated TensorFlow.js for on-device model execution; improved cloud costs by $20K annually through efficiency improvements.

Full Stack Software Engineer at Netcraker

June 1, 2015 - August 1, 2017

Developed presales proofs of concept for OSS/BSS and MANO/SDN providers; supported presales through development and customer presentations; engaged with major Asian telecoms as a Sales Engineer representative.