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Harshana Amuwatte

Harshana Amuwatte

Final year undergraduate @ University of Moratuwa

Moratuwa, Sri Lanka

About

Recently wrapped up a software engineering internship at WSO2, where I worked on migrating the Java-based Micro Integrator XML Language Server to TypeScript to enable browser-based execution (including WebAssembly powered XSD validation).

Alongside university, I ship indie products including a native macOS app with 200+ paying users across 41 countries and mobile apps with 30K+ downloads. Big on developer tools, compilers, and systems performance.

Off-screen: playing cricket, traveling, and riding.

Experience

Software Engineer Intern @ WSO2

Feb 2026 – Jul 2026 (6 Months)Colombo, Sri Lanka

Integration Team, Engineering, WSO2

  • Designed and developed a cross-platform XML Language Server using TypeScript and WebAssembly (WASM), replacing the JVM-based implementation and enabling browser support (vscode.dev).
  • Built XML parsing, language intelligence, and XML/XSD validation using a modular TypeScript architecture and WebAssembly.

Software Developer (Mobile, Part-time) @ Code Craft Apps Ltd

Nov 2024 – May 2025 (7 Months)Moratuwa, Western Province, Sri LankaRemote

Built and maintained Flutter applications while studying full-time.

Software Developer – iOS (Contract) @ Tussle Inc.

Sep 2023 – Apr 2024 (8 Months)United States, Remote
  • Contributed to the iOS engineering team of a live streaming platform supporting interactive PK battles.
Freelancing

Freelance Software Developer (Mobile Platforms) @ Fiverr

Dec 2021 – Nov 2025 (4 Years)

Delivered 17+ production mobile applications, maintaining 5-star ratings.

Projects

xml-language-ecosystem

a browser-native xml language services, runs in vscode.dev, xsd validation via xerces-c++ compiled to wasm.

Synapse Mac App (1.5K Downloads, 200+ Paid Users)

June 2025 – Present Built a native macOS productivity app focused on performance and system-level efficiency. Architected modular components for clipboard management, OCR processing, window utilities, and network monitoring. Optimized for a low memory footprint (~100MB RAM) and lightweight binary size (~3.9MB). Distributed as an Apple-notarized application with 1500+ downloads and used by people in 41 countries.

Scaled Consumer Mobile Application (30k+ Downloads, 1.2k MAU)

Mar 2021 – Present Designed, developed, and scaled a subscription-based consumer mobile application to 30k+ installs, ~1.2k monthly active users. Owned end-to-end product lifecycle including architecture, analytics integration, monetization strategy, and performance optimization. Focused on retention, growth experimentation, and operational stability in production.

Moderato CMaaS – AI-Powered Content Moderation Platform (Open Source)

Jan 2021 – Present Designed and built an API-first content moderation platform powered by Retrieval-Augmented Generation (RAG). Architected backend using FastAPI with modular policy engine for customizable moderation rules. Integrated LLM-based contextual evaluation to enhance decision accuracy. Open-source project focused on extensibility, transparency, and scalable moderation workflows.

Chrome Productivity Extension (1.3k+ Active Users)

Jan 2025 – Jan 2025 Built and published a Chrome extension for workflow automation and productivity enhancement. Designed lightweight client-side architecture with privacy-first local data handling. Achieved 1k+ active users and iterated based on user feedback.