Crafting digital tools with obsessive attention to detail — where personal curiosity meets real-world usefulness. If it solves a real problem, I'll ship it.
// Building with fun & purpose const castronix = { principle: "Simple yet beautiful", design: "Clean & intentional", focus: "Tools that matter", architecture: "TOGAF-aligned", }; export default castronix; // ship it
Hey, I'm Arun — or Castronix in the digital world — an Enterprise & Solutions Architect with an intense passion for coding. I believe being "coder-first" makes a better architect: you visualize the entire path from concept to delivery, mapping efficient, well-structured paths to see things through.
I've always wanted to create things that live on the internet. With AI-assisted learning accelerating what's possible, I've reopened my hands-on coding journey — exploring full stacks, experimenting with architectures, and building tools that actually matter.
When I'm not shipping code, you'll find me tracking market metrics or tracking reps — optimizing portfolios and fitness alike.
Here are a few technologies I've been working with recently:
Personal projects built with purpose and AI assistance — from idea to live, shipped products.
Web App
19 interlinked financial calculators in one app — EMI, tip splits, compound interest, currency conversion, and more. Plan mode lets you chain calculations together for smarter decision-making.
Desktop App
Lightweight desktop task board with a 15-stage pipeline, ETag-based distributed sync, and multi-agent orchestration for AI-assisted developers. Built to bring clarity to complex workflows.
Mobile App
Mobile companion for Klarity — review, update, and triage tasks from your phone with zero-server architecture using GitHub as backend and SHA-based conflict resolution.
Web App
Interactive digital resume with AI chat assistant, skills radar, project showcase cards, and 9-step workflow visualization. Crafted to showcase technical depth and design sensibility.
Music
AI-assisted original music production. A creative exploration blending technology with artistic expression. Themes of warmth, nostalgia, and human connection.
Music
AI-assisted original music celebrating Singapore. Themes of identity, culture, and the island's unique spirit. A tribute to the little red dot on the map.
Mobile App
A mobile strength training app that tracks and prompts your workouts, rest periods, and progress. Features timer modes, workout history, and detailed analytics for all — beginners to serious lifters.
Web App
A notes app with real-time sync across devices. Features markdown support, folder organization, and AI-powered search to find any note instantly. Built for speed and simplicity.
AI / Voice
An agentic AI strength coach that communicates via WhatsApp and voice calls. Leverages workout data from REPPIT to provide personalized training guidance, form corrections, and motivation.
Automation
Automated portfolio construction and maintenance — covered calls, rebalancing, and risk analytics to outperform market indexes.
Ideas brewing in the background, waiting for the right moment to build.
Inspired by TOGAF's Architecture Development Method
Every project follows a structured methodology that ensures quality, maintainability, and deliberate progress from concept to production.
Read the Article
Track time from day one. Every commit, every session logged.
Document requirements. Prototype the interface. Validate before building.
Define what success looks like. Write tests before code.
Implement with type safety. No shortcuts, no any types.
Touch every feature. Break things before users do.
Fix issues. Iterate based on real usage patterns.
Review architecture. Ensure maintainability for future self.
Deploy to production. Monitor performance and errors.
Analyze time spent. Document learnings for next project.
Hover over each card to reveal how we apply these principles.
These principles guide every decision, from architecture to micro-interactions. A11Y Accessibility is built into every component.
No any types. Full TypeScript coverage ensures reliability and enables confident refactoring.
Start with the smallest viewport. Scale up. Touch targets and gestures considered from day one.
Validate inputs at boundaries. Protect sensitive data. Never trust the client.
Built my own 15-stage task board. Every feature flows from idea through build, test, and ship.
Consistent patterns. Reusable components. Dark mode by default. Accessibility built-in.
DEV-CLOCK from commit one. Know where time goes. Improve estimation accuracy.
What's Next?
Whether you want to connect with an architect who codes, want to collaborate on something meaningful, or explore what's possible with AI — my inbox is open. I'm always up for conversations about architecture, AI-assisted development, or interesting problems to solve.