Field Guides
Long-form guides for senior engineering and product practitioners — interview prep, deep dives, build-alongs, references, and playbooks across AI, data, product, and DeFi.
Browse by topic below. Each topic page lists the guides it contains.
Building, shipping, and reasoning about AI systems — agents, MCP, RAG, evals, and the operational glue around them.
Data EngineeringThe modern data stack from a senior analytics-engineering angle — SQL, dbt, modeling, warehouses, orchestration, observability.
Data ScienceTwo guides grouped by archetype — product/analytics DS and full-stack/applied DS. SQL, experimentation, causal inference, production ML, feature engineering.
Product ManagementSenior PM interview prep for fintech and crypto product roles — platform thinking, payments, KYC/onboarding, growth funnels, regulatory product work, and stakeholder management.
DeFi EngineeringSenior DeFi protocol and smart-contract engineering — mechanism design, AMM and lending math, Solidity at TVL-securing scale, EVM and gas mastery, formal verification, and shipping safely through audit cycles.