Launch tracks
Every track, at a glance
Full tracks ship with deep concept trees and hundreds of tasks. Compact tracks focus on the concepts that matter most, without the filler.
Start a sessionLive now
System Design
Keep the architecture muscles warm: scaling tradeoffs, caches, queues, consistency, API boundaries, and reliability habits that matter under load.
40 concepts
Python
The data model, iteration protocol, typing, and async machinery under the Python you write every day. These are the parts that get fuzzy first.
73 concepts
SQL & PostgreSQL
Re-sharpen the SQL the ORM has been hiding: joins that filter, NULLs that break NOT IN, window frames, isolation anomalies, and reading an EXPLAIN plan on real Postgres.
73 concepts
Agentic Engineering
Work coding agents like an engineer: context files, subagents, prompt injection, guardrails, model routing and cost, and reviewing what the machine actually wrote.
88 concepts
JavaScript / TypeScript
Re-sharpen the JS/TS details that atrophy first: coercion, closures, this, the event loop, and a type system you drive instead of fight.
71 concepts
Git
Keep Git's moving parts straight: commits, branches, merges, rebases, remotes, recovery, and the collaboration rules that prevent a small command from becoming a bad Friday.
65 concepts
React
Rebuild your instincts for how React actually works: reconciliation, effects, memoization, and the concurrent/server-component model that quietly changed the rules.
70 concepts
Data Engineering
Refresh the pipeline and analytics fundamentals that fade fastest: batch vs streaming, data modeling, file layouts, warehouse SQL, quality, lineage, and operations.
40 concepts
Java & OOP Fundamentals
Re-sharpen the Java details that separate routine OOP from robust systems: equality contracts, generics, concurrency, collections, and JVM behavior.
72 concepts
Next.js
Rebuild your mental model of the App Router: where each of the four caches bites, what actually crosses the server/client boundary, and why your page went dynamic.
67 concepts
Detailed skill trees and sample tasks are coming soon. For now, enrollment happens right after you sign up.