The path to a professional AI engineerProFirst 5 chapters free

Python for AI Career

A six-month career track — a professional environment with uv, clean code, OOP, testing, FastAPI, RAG on pgvector, security, Docker, a React client and a full capstone project. Six steps and a ten-question quiz in every chapter.

The six steps in every chapter

1Encounter
2Understand
3Worked
4Predict
5Apply
6Stretch

This course is Pro

The chapter list is open to everyone, so you can see what is taught before deciding. The first 5 chapters are free to read. Playing the levels, and every chapter from 6, needs Pro.

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01The AI engineer track, and dev environments with uv35 min10 questionsRead Play· 8 min
02Git, branches and Pull Requests — how teams work40 min10 questionsRead Play· 9 min
03pyproject.toml, lockfiles and the src/ layout — modern project structure40 min10 questionsRead Play· 9 min
04pathlib, JSON/YAML config and environment variables40 min10 questionsRead Play· 9 min
05Lists, dictionaries, sets, loops and comprehensions40 min10 questionsRead Play· 9 min
06Functions and error handlingPro40 min10 questionsRead Play· 9 min
07Data validation with Pydantic and JSONPro40 min10 questionsRead Play· 9 min
08Which Python runs your code? Interpreters, sys.path and the project .venvPro30 min10 questionsRead Play· 8 min
09Lab: building the foundation templatePro45 min10 questionsRead Play· 9 min
10Milestone 1 review: clean environment and validationPro45 min10 questionsRead Play· 9 min
11OOP fundamentals — classes, objects, inheritancePro40 min10 questionsRead Play· 10 min
12Modular OOP design — composition, properties and classmethodsPro45 min10 questionsRead Play· 10 min
13Functional programming in Python — lambda, map, filter, reducePro35 min10 questionsRead Play· 9 min
14Memory management and resource leaksPro45 min10 questionsRead Play· 10 min
15Mutation bugs and state managementPro40 min10 questionsRead Play· 9 min
16Context managers and resource handlingPro40 min10 questionsRead Play· 9 min
17Code profiling and optimisationPro40 min10 questionsRead Play· 9 min
18Refactoring legacy code — better structure, same behaviourPro45 min10 questionsRead Play· 9 min
19Hands-on lab: refactoring a legacy pipelinePro50 min10 questionsRead Play· 9 min
20Milestone 2 review — the refactored pipelinePro45 min10 questionsRead Play· 9 min
21Testing fundamentals with pytestPro45 min10 questionsRead Play· 9 min
22Deep debugging with pdbPro40 min10 questionsRead Play· 9 min
23Mocking and test isolationPro45 min10 questionsRead Play· 10 min
24Controlling time in tests — freezegun and injected clocksPro40 min10 questionsRead Play· 8 min
25Characterization and regression testsPro40 min10 questionsRead Play· 9 min
26Static typing and linting — mypy and ruffPro40 min10 questionsRead Play· 8 min
27Live coverage audits with pytest-covPro40 min10 questionsRead Play· 8 min
28Automated validation — pre-commit hooks and CIPro45 min10 questionsRead Play· 8 min
29Hands-on lab: debugging production bugsPro50 min10 questionsRead Play· 9 min
30Milestone 3 review — the regression suitePro45 min10 questionsRead Play· 8 min
31asyncio — coroutines, tasks and the event loopPro40 min10 questionsRead Play· 9 min
32A CRUD API with FastAPI — routes, models and status codesPro45 min10 questionsRead Play· 9 min
33Resilient API clients — timeouts, retries and circuit breakersPro45 min10 questionsRead Play· 9 min
34Milestone 4 review — a concurrent FastAPI servicePro45 min10 questionsRead Play· 9 min
35Data handling and SQL optimisation — PostgreSQL and indexesPro50 min10 questionsRead Play· 10 min
36Intro to vector databases with pgvectorPro40 min10 questionsRead Play· 9 min
37Semantic search with pgvector — distances, chunking and top-k queriesPro30 min10 questionsRead Play· 10 min
38RAG prompts and retrieval — grounded answersPro45 min10 questionsRead Play· 10 min
39Hands-on lab: a RAG APIPro50 min10 questionsRead Play· 10 min
40Milestone 5 review — RAG retrieval diagnosticsPro50 min10 questionsRead Play· 10 min
41Prompt injection defence and AI securityPro40 min10 questionsRead Play· 10 min
42Dependency audits and OWASP API securityPro40 min10 questionsRead Play· 8 min
43Container networks with Docker ComposePro45 min10 questionsRead Play· 8 min
44System monitoring and alerts with SentryPro40 min10 questionsRead Play· 8 min
45Milestone 6 review — a hardened container setupPro50 min10 questionsRead Play· 8 min
46React Frontend FundamentalsPro40 min10 questionsRead Play· 8 min
47React hooks and fetch — connecting to FastAPIPro55 min10 questionsRead Play· 9 min
48JWT authentication — login, tokens and protected endpointsPro55 min10 questionsRead Play· 9 min
49SSE streaming — an LLM's answer word by wordPro55 min10 questionsRead Play· 9 min
50Milestone 7 review — an authenticated streaming clientPro55 min10 questionsRead Play· 8 min
51Capstone kickoff and strangler-fig migrationPro40 min10 questionsRead Play· 9 min
52Constructing technical runbooksPro40 min10 questionsRead Play· 9 min
53Deployment and monitoring — staging, smoke tests and rollbackPro60 min10 questionsRead Play· 9 min
54Demo rehearsal — preflight, a fallback plan and measured practicePro45 min10 questionsRead Play· 9 min
55Capstone presentation — measured claims, defended decisions and a two-minute storyPro40 min10 questionsRead Play· 9 min