Build Tooling Modernization
Led a zero-incident Webpack-to-Turbopack migration on a production Next.js dashboard (Next.js 16 / React 19), cutting build times by ~85%.
- Next.js
- React
- Turbopack
- TypeScript
Available for opportunities
Technical LeadBuilding ProductsThat Make an Impact
I'm Sameera Madushan, a Technical Lead and Full-stack Engineer with 9+ years of experience building scalable web and mobile platforms. Currently leading frontend engineering for a Dutch B2B vehicle-repair marketplace.
- 9+
- Years Experience
- 5
- Years in Current Role
- 95%
- On-time Delivery Rate
- 93.8%
- AI Efficiency Gain
Trusted to build at
Fixico
Gapstars
ObjectOne
Villvay
Virtusa
And technologies I work with
- Next.js
- React
- TypeScript
- Node.js
- GraphQL
- MySQL
- Docker
- Kubernetes
- Google Cloud
- Sentry
- Jest
- Redux
About me
Engineering meaningful solutions at scale
Technical Lead and Full-stack Engineer with 9+ years building scalable platforms across automotive, healthcare, and telecom. I enjoy solving complex problems, mentoring teams, and using modern tooling (and AI) to build better, faster. Based in Sri Lanka, working with global teams.
Full-stack Engineering
React, Next.js, TypeScript, Node.js and modern web technologies.
Team Leadership
Leading high-performing teams, hiring, and mentorship.
Cloud & DevOps
GCP, Docker, Kubernetes, CI/CD, monitoring and reliability.
AI Enthusiast
Exploring AI tools to improve developer productivity and outcomes.
Featured work
Selected Projects & Case Studies
Experience
My Professional Journey
Technical Lead
Gapstars | Fixico · Sri Lanka
Sep 2024 - Present
Leading frontend engineering for the marketplace's product dashboards across four production repositories.
- Directed a team of 6+ (devs, QA, DevOps, POs) with a 95% on-time delivery rate.
- Delivered zero-incident Webpack to Turbopack migration slashing build times by ~85% (5 min to 44s).
- Cut production Sentry error rate by 50%+ after solving a critical 401 error storm.
- Pioneered Claude Code AI pilot achieving a documented 93.8% efficiency gain.
Senior Software Engineer
Gapstars | Fixico · Sri Lanka
Sep 2021 - Sep 2024
Owned platform stability and delivered complex features including cross-platform user management, Next.js migrations, and team mentoring.
Lead Mobile Engineer
ObjectOne | NCell Nepal
Nov 2020 - Sep 2021
Designed mobile platform architecture with Keycloak auth; shipped React Native distribution app on App Store, Play Store, and CodePush.
Software Engineer
Villvay · Sri Lanka
Nov 2018 - Nov 2020
Built dealer management tools (React, Webpack) and customer platforms (MeteorJS, Spring Boot REST API, React Native).
Junior Software Engineer
Virtusa · Sri Lanka
Nov 2016 - Nov 2018
Automated manual banking workflows (reducing time by 2X) and created real-time Node.js dashboards.
Technical expertise
Skills & Tooling
Frontend
- React 18/19
- Next.js
- TypeScript
- Turbopack
- Redux Toolkit
- Material UI
Backend & APIs
- Node.js
- Next.js API
- REST
- GraphQL
- MySQL
- Cloud SQL
Cloud & DevOps
- Docker
- Kubernetes
- GCP
- LaunchDarkly
- Sentry
- CircleCI
AI & Practices
- Claude Code
- Gemini
- Cursor
- Trunk-Based Dev
- Jest & RTL
Powered by Gemini
AI Recruiter & Architecture Suite
Two tools grounded in my real background: ask the assistant anything, or paste a role and get a candid fit assessment.
Sameera's AI Technical Assistant
Grounded in his real experience. Answers can be imperfect.
Hi! I'm Sameera's AI assistant. Ask me about his architecture decisions, leadership experience, or the numbers behind his work.
Try asking
Let's build something great together
I'm always open to discussing new opportunities, interesting projects, or just having a chat about technology.