// store

Materials you'll
actually use.

Free resources and paid packs for engineers
who learn by doing.

// roadmaps
// 01
data engineering roadmap

Data Engineering

Top 1% roadmap. Python, SQL, NoSQL, Spark, Kafka, AWS, Azure, dbt and more. 107 topics with progress tracking.

open →
// 02
english b2 → c1

English B2 → C1

From working proficiency to near-native fluency. Grammar, vocabulary, TOEFL and tech interview prep. 63 topics.

open →
// 03
math linear algebra

Linear Algebra

From vectors and matrices to SVD, PCA and transformers. Applied to data science, finance and crypto. 33 topics.

open →
// 04
math visual map

Math Areas Map

Visual reference of 12 mathematical areas — which to learn, why, and in what order for data, finance and crypto.

open →
// skills
// 01
claude code 4-pack

Claude Code Skills
4-pack

The complete pack — all four Claude Code skills bundled and formatted for offline use. Hooks, slash commands, MCP servers, custom agents. Everything you need to build a real Claude Code workflow.

  • Hooks — event-driven automation
  • Slash Commands — custom skills
  • MCP Servers — extend Claude's reach
  • Custom Agents — multi-step orchestration
Free
buy now →
// no drm · yours forever