Software Developer at Techedify PH

Joseph Karl Crisostomo

Full-stack developer who ships production web apps independently and builds daily with AI-assisted 'vibe coding' tools.

Résumé (PDF) View résumé Cover letter (PDF)

In brief

I take ownership of platform issues end-to-end across the JavaScript and Rails (MVC) stacks, with production experience in PostgreSQL, REST/API integration, and testing. I build daily with Claude Code while owning the architecture myself, and I've shipped an AI-as-a-Service platform that exposes models as consumable APIs — a natural fit for a Generative AI EdTech team operating on US hours.

Selected work

Aqualytix — Water-Quality Monitoring Platform

Production monitoring platform built solo end-to-end for an industrial client, delivered in 7 incremental deployable phases with real tests, role-based authorization, and PDF/email reporting — built with Claude Code under fully human-owned architecture.

Ruby on Rails (MVC)PostgreSQLHotwire (Turbo/Stimulus)JavaScriptAWSKamal/DockerClaude Code

aqualytix.hackwithsef.xyz

AI-as-a-Service Platform (DOST-ASTI)

Platform standardizing how AI/ML models are developed, deployed, and exposed as consumable APIs across institutes — cutting model integration from ~2–3 months to days.

REST APIsAI model deploymentDockerAWS

Kuryente Watch — Real-Time Community Status App

Crowdsourced, near real-time electricity-status web app with an interactive Leaflet map, live Action Cable updates, and Web Push — built end-to-end via agentic AI with me as technical pilot/reviewer.

Rails 8PostgreSQLHotwireLeaflet.jsAction CableWeb PushClaude Code

infanta.kuryentewatch.app

Toolkit

JavaScriptTypeScriptNode.jsHTMLCSSReactNext.jsHotwire (Turbo/Stimulus)Ruby on Rails (MVC)PostgreSQLREST API design & integrationUnit/integration testingAI-assisted development (Claude Code, Claude Design)AWSDockerIndependent / async remote work