things I've built

saddlebag: cycling preps

Oct 2026

A pre-ride planner for iPhone, iPad and Android. Drop in a GPX and it works out every climb for your weight, FTP and gearing, then plans the fuel, the pack and what's due on the bike. Native SwiftUI and Jetpack Compose. No account, and everything stays on the phone.

The Pain Forecast

Jun 2026

A "national weather service for cycling suffering." Feed it your gearing, weight and FTP and it forecasts any climb — the watts the gradient demands, the warning level you're riding into, and exactly where you'll crack. Built with Next.js + TypeScript and a client-side physics engine.

Hanko: Coffee Passport

Apr 2026

Passport-style companion app for coffee lovers to collect stamps from local cafés.

Tagomoto: Home Organizer

Apr 2026

A calm iOS notebook for turning places, routes, and personal memories into simple hand-drawn grid maps. https://tagomoto.jechocarlos.dev/

Taskmaster

Mar 2026

Infrastructure for turning a product vision into an engineering plan scoped to what your team can realistically deliver.

Gen AI CoE Services Ecosystem

Jun 2025

Internal AI platform for Cambridge University Press & Assessment — vision, architecture, and company-wide rollout.

Lesson Planner + Assessments Generation

Mar 2025

AI-generated lesson plans with filled educational content and PDF output for Cambridge's learning teams.

Academic Chat AI

Jun 2023

Internal ChatGPT-style platform for Cambridge academics and editorial teams — started as a pet project, became a product.

Keebot

Mar 2023

Discord bot managing the Keebisoria keyboard marketplace — buy/sell/trade posts, vouch system, and reputation tracking for a Philippine mechanical keyboard community.