Senior full stack engineer in Colombo, Sri Lanka. Six years of SaaS, AI and payments work, drawn here in 40,000 grains of ash.
A personal finance app for Android. It reads bank and card SMS and turns each one into an expense, then keeps bills, credit cards, loans and savings in view across rupee and dollar wallets, with home-screen widgets and cloud sync.
Read the code on GitHub
Play the same sound on two Bluetooth headsets at once on Windows, in sync. A small WinForms app on raw WASAPI, with no virtual audio driver.
Read the code on GitHub
An offline settings app for the Attack Shark X68 HE keyboard, made for games: Rapid Trigger, per-game setups that switch on their own, macros and lighting. Unofficial.
Read the code on GitHub
Drives the shift lights on a Logitech G29 wheel from live engine RPM in Forza Horizon 5 and Euro Truck Simulator 2.
Read the code on GitHub900
rpm
1
gear
The shapes are not pictures or models. The same grains redraw themselves for every project. More on GitHub:
5.0 s → 21 ms
One search across 20,000 documents, timed in testing before and after.
Searching for text anywhere inside a field cannot use an ordinary index, so PostgreSQL was reading every one of 20,000 documents on every search. It took about five seconds.
Added a trigram GIN index with pg_trgm, which indexes every three-letter slice of the text, then ran the same searches again and compared the query plans and timings.
The same search came back in 21 ms, about 240 times faster. The same round of tuning made a count query 21 times faster and a token lookup 213 times faster.
6+
Years shipping production software, from intern to senior engineer.
213×
Faster token lookup after tuning one query that every signed-in request depends on.
123/123
Regression cases passing after the end-to-end suite moved to AWS Fargate Spot.
Feb 2026 to now
Senior Software Engineer
Apr 2024 to Feb 2026
Senior Software Engineer
May 2022 to Mar 2024
Software Engineer
Sep 2020 to Apr 2022
Junior and intern roles
Ashen is an old word for the colour of ash. I took the hint: I like software that is light, fine-grained and quick to settle.
I am a senior full stack engineer with more than six years across B2B SaaS, travel tech and fintech. By day I build a multi-tenant platform at Docupath. Before that I shipped an AI restaurant booking platform, a trip-planning assistant and a PCI-compliant payments API. After hours I build things for myself: a finance app for my phone, one sound on two headsets, software for my keyboard, shift lights for my wheel.
React or Next.js in front, Node.js, NestJS or .NET behind, PostgreSQL underneath, delivered with tests.
Chat, search and RAG on OpenAI or Mistral with Pinecone, with rate limits and logging from the first day.
Secure REST APIs with OAuth2 and JWT, including a PCI-compliant Mastercard gateway integration.
Playwright end-to-end and API suites that run on every push in GitHub Actions.
Playwright scrapers that hand back clean CSV and JSON, however many pages it takes.
React Native and Flutter apps wired to AWS or Firebase.
This page is three.js and one hand-written shader. No 3D models, sixty frames a second.
| Languages | TypeScript, JavaScript, C#, Python, PHP, Dart |
|---|---|
| Interface | React, Next.js, Angular, Tailwind CSS, TanStack Query, Vite |
| Mobile | React Native, Flutter |
| Server | Node.js, NestJS, Express, .NET, TypeORM, REST APIs |
| Data | PostgreSQL, MySQL, MongoDB, Firebase, Pinecone |
| AI | OpenAI API, fine-tuned Mistral, RAG, Claude Code |
| Cloud and delivery | AWS, Docker, Terraform, GitHub Actions |
| Testing | Playwright, Vitest, Jest, PHPUnit |