Case studies

Systems in production, with the decisions behind them.

Each case covers the context, what I built, and the measured outcome. Client work is described within confidentiality limits.

012024–2025

SendFlow

~10×

lower sending cost vs. Mailchimp

A complete email marketing platform built to replace Mailchimp: campaigns, automations, tagging, and bounce management.

Amazon SES · Next.js · Supabase · Vercel

022026

SpeedSync Studio

10–20×

faster export — from raw race footage to a finished, shareable clip

Desktop app that overlays GPS-derived speed, lap timing and G-force onto GoPro footage via a zero-disk-write FFmpeg pipeline.

Rust · Tauri · React · TypeScript · FFmpeg · OffscreenCanvas

032025–2026

Investment Copilot

$0/mo

recurring cost of the AI reporting pipeline

A personal finance system that tracks investment allocation against targets and market benchmarks, and syncs expenses automatically via Brazil's Open Banking APIs.

TypeScript · Next.js 16 (App Router) · MySQL · React Query · ECharts · Vercel