Quantary
Investigations. Builds. Forecasts.
Architect a record store going online. Investigate a fraud. Forecast wave conditions from buoys, satellites, and thirty years of handwritten surf logs.
Real data engineering cases — pipeline design, architecture, SQL, and Python — set in stories you actually want to finish.
Case 01 · The Phantom Transactions — DuckDB-WASM in your browser
Stage 01 · Launch Day — system design on a live canvas
Keep the data engineer in the loop.
Agents can draft your pipeline. They can sketch your schema, write the query, plan the migration. Knowing which one's right — and which to throw out — is the part you can't outsource.
A growing library of modules — here are a few
Data Case Files
Vol. 1 — Follow the Money
Someone at Meridian Corp is moving money they shouldn't be. Phantom transactions in the ledger, tampered archives, suspicious wire transfers, inflated prices — the evidence is buried in the numbers. You're the detective. Work the cases, follow the money, and piece together a conspiracy that someone went to great lengths to hide.
Double Entry
The Flat Table Disaster
Questborne, a small game studio, shipped their online multiplayer game "Realm of Echoes" with one giant table for everything — players, items, guilds, gold, all mashed together. Now the in-game economy is melting down: duplicate items, phantom gold, guild leaders who change retroactively. You're the contractor called in to untangle it.
Diamond Data
Baseball Sabermetrics
Sabermetrics is the use of statistical analysis to evaluate baseball players beyond traditional scouting. Small-market teams can't outspend the giants — but they can outsmart them. The Ridgeline Aces haven't made the playoffs in a decade, and new GM Sarah Chen is betting on analytics to turn things around. As the team's first data analyst, you'll crunch batting stats, pitching metrics, and player contracts to find hidden value and build a winning roster on a budget.
Cloudbreak
Analytics Architecture
Pelican Point, Western Australia — a legendary reef break where three-meter swells peel over shallow limestone. The World Surf League wants to run a competition here, and they need a forecasting platform. You're spending the summer turning thirty years of handwritten surf observations into a production analytics system — from raw landing zone to real-time dashboards to wave-quality predictions.
More modules in the works — analytics, forensics, AI, system design, and beyond.
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