Software developer

Resume

Software developer focused on full-stack tools, practical interfaces, and deployable systems. Most of the work sits in the foundations: data flow, validation, deployment, and making systems clear enough to keep changing.

Jayden Ontalan Capistrano

Software Developer

Builds deployed web apps, local-first project systems, static public tools, and spreadsheet-native calculators with a bias toward documented validation and operational clarity.

PDF coming soon

Resume PDF coming soon

Target roles

Software DeveloperFull-stack DeveloperFrontend DeveloperInfrastructure-minded Web Developer

Core strengths

Building and validating deployed full-stack applications.
Designing practical UI flows for data-heavy tools.
Documenting project boundaries, data flows, validation paths, and known issues.
Turning unclear requirements into documented, testable systems.

Skills from current project work

Frontend

ReactTypeScriptNext.jsViteSvelteKitGoogle Sheets UI

Backend / Data

PythonFlaskPrismaPostgreSQLSupabasespreadsheet formulas

Validation / Delivery

build checkstest suitesdata validationmigration checksrelease checksproject documentation

Selected project experience

SpineFrame

Python, Flask, PostgreSQL

live production

Built authenticated chat, history, memory review, account, and settings flows around a user-scoped continuity runtime.
Moved the public-user path from JSON files into Postgres-backed auth, session, conversation, and memory stores.
Validated Alice/Bob isolation, memory integrity, and storage migration parity through project gates.

VocabVerse

Next.js, React, TypeScript, Prisma, PostgreSQL

private beta

Built and deployed a Japanese vocabulary learning app centred on songs, lyrics, study cards, and persistent review data.
Integrated Prisma with PostgreSQL around users, songs, lyrics, study items, review attempts, and progress state.
Validated the private-beta app with schema checks, linting, and production build checks while shaping the auth path.

hangout-planner

React, TypeScript, Vite, Supabase

live

Built and deployed a no-login planning site for friend meetups, availability polling, follow-up questions, participant notes, and group-facing results.
Integrated a static React frontend with Supabase-backed event and vote data while keeping source and public build output separate.
Kept the public release separate from source files and checked the built output before deployment.

Mage's Survival Calculator

Google Sheets, XLSX, formulas, named ranges

live Google Sheet

Built a live spreadsheet-native calculator for Mage's Survival build planning, spell comparison, item effects, passive levels, and stat outcomes.
Modelled mage, spell, item, and stat relationships through formula-backed Google Sheets tabs and preserved the workbook as a local XLSX source artefact.
Treated accuracy as a shipping requirement, with verification built into how calculator features were added.

Validation evidence

SpineFrame: user-isolation smoke flows, memory integrity checks, and storage migration parity.
VocabVerse: Prisma schema checks, build validation, private-beta auth, and persistent lyric/study data.
hangout-planner: live planning flow, Vite build validation, Supabase-backed event data, and checked release output.
Mage's Survival Calculator: live workbook metadata, local XLSX snapshot, formula structure, and accuracy-first feature checks.