Merchprint PH (in development)
Online shop for a printing business displaying products with an add-to-cart flow, plus a custom admin dashboard tracking orders and quotations. Backend hand-built from scratch with Hono.
hellooooo!Software Engineer · React & TypeScript
I'm Diana Vanessaaka DiVa~Diana Vanessa Castillo
a software engineer who gets excited about the details no one else notices. I write code with the next developer in mind, not just the current deadline.
React & TypeScript specialist, production experience at Samsung R&D and Accenture, three solo-built apps live on iOS and Android, and full-stack work across Node.
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a little about meAbout
じこしょうかいI'm a frontend engineer who's been continuously shipping since 2022. My teammates always said I'm the one who thinks two steps ahead. I write code with the next developer in mind, not just the current deadline.
I'm an engineer first. My foundations are clean React, TypeScript, accessible HTML, and the kind of state and component design that holds up once a codebase gets messy. AI is just one of the tools I use well. I've shipped production features with the OpenAI API and Claude Code, like a quotation parser at G+U and a natural-language task manager. I've also shipped three React Native apps to the App Store & Google Play, and right now I'm exploring the backend on my own terms, building Merchprint PH's admin dashboard and custom quotation forms from scratch with Hono, Drizzle, and PostgreSQL.
I'm also the person who'll tell you honestly if something could be built better. Not to be difficult! It's just that, I actually care how the project turns out. (my best ideas usually arrive with a matcha latte)
BS Electronics & Communications Engineeringcum laude ✦
University of the Philippines, Diliman
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where I've workedExperience
けいれきMay 2025 - Mar 2026
Custom Software Engineering Analyst
Accenture Philippines
Built responsive React + TypeScript apps with REST integration. Delivered production features in Agile teams with strong WCAG accessibility and use of AI-powered features.
2022 - 2024
Software Engineer
Samsung R&D Institute Philippines
Ramped into React enterprise development and delivered production features within the first month. Built reusable, secure UI components, integrated APIs, and led internal knowledge sessions.
always & ongoing ✦2022 — Present
Independent Developer
Eternal Hobby Hopper (my solo dev brand)— independent app & web studio
Solo dev brand with three React Native apps shipped to the iOS App Store and Google Play; freelance React, Next.js, and AI-integration contracts; self-directed deep dive into backend development with Hono, Drizzle, and PostgreSQL.
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things I've builtSelected Work
さくひんしゅう
Gassupop
my cozy little habit tracker ♡Gamified habit tracker · iOS & Android
Complete tasks → earn tokens → twist a virtual gachapon → pull self-defined rewards. A softer, more personal way to stay motivated. Live on iOS App Store and Google Play, under my solo dev brand, EternalHobbyHopper.
The Tiny Council
three good dogs. one good answer. ♡Character-driven decision app · iOS & Android
Stuck on dinner? A movie? Texting them back? Hand it to the council. Gusto the skeptic, Lumie the wise one, and Clay the enthusiast confer and deliver a verdict. Live on iOS App Store and Google Play, with in-app purchases, Offline, ad-free, no nonsense, under my solo dev brand, EternalHobbyHopper.
G+U Gashapon Quotation Generator
AI-powered quotation parser with dynamic pricing. Built with React, Express, OpenAI, and Tailwind. Cut manual processing time significantly.
AI Brain Dump Task Manager
Full-stack app converting natural language input into structured tasks. AI parsing extracts actionable items from messy thought dumps.
Tita Cards
Animated greeting cards designed for Filipino aunties to send on Messenger and Viber, culturally specific sayings, auto-looping GIFs.
It's Me Apparel PH
Inclusive apparel brand site built for my autistic brother. Responsive Next.js
hacktype.pro
A typing speed test disguised as a hacker terminal — cozy hacker mode included. (Monkeytype, but for anyone who fantasizes to be a hacker - opensource).
Creducate
Solana blockchain credential verification for tamper-proof academic records. Presented at IEEE TENCON 2022.
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skills I'm proud ofSkills & Tools
ぎじゅつFrontend
~ what I enjoy mostCore stackReact.js ♡TypeScript ♡JavaScriptNext.jsViteVue.jsReact NativeExpoHTML/CSSTailwindCSS ModulesStyled ComponentsPrimeReact
Backend, Database & AI
~ growing every dayBackend & dataHono ♡Drizzle ORMPostgreSQLNode.jsTypeScriptJavaScriptREST APIs ♡Better AuthCloudflare R2OpenAI API ♡ExpressMongoDBPythonJavaC++
Practice
~ how I workProcess & practiceAgile · Scrum/KanbanGit, CI/CDClaude CodeGithub CopilotWCAGPerformanceHonest reviews ♡MentoringTechnical Design DocsMonorepo
work with me — I'd love to hear from youLet's work together
Reliable, thoughtful, and someone who'll treat your codebase like it actually matters. ♡Open to freelance and full-time roles. I bring care, clarity, and follow-through to every codebase I touch.
Diana Vanessa CastilloTaguig City, Philippinesdianavs.castillo@gmail.com
send a messageEmail me