AI Engineer Micro-Tasks Index

A quick index of all micro-tasks in this repository. Each task is a self-contained lab with its own README, LEARNING guide, code, and docker-compose environment.

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01 – 03: Fastify Service Foundations

01. 01.micro-task-0.1-fastify-service

• Minimal Fastify HTTP service
• Health and info endpoints

02. 02.micro-task-0.2-fastify-predict

• Fastify service with /predict endpoint
• JSON schema validation

03. 03.micro-task-0.3-fastify-ml-layer

• Refactored ML layer module
• Separation of concerns

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04 – 09: Classical ML Foundations & Model Management

04. 04.micro-task-1.1-python-sklearn-baseline

• TF-IDF + Logistic Regression
• Introduces basic ML pipeline
• train/test split, accuracy metrics

05. 05.micro-task-1.2-text-cleaning

• Text cleaning preprocessor
• Lowercasing, punctuation removal, stopwords

06. 06.micro-task-1.3-cross-validation

• k-fold cross-validation
• Model evaluation improvements

07. 07.micro-task-1.4-hyperparameter-tuning

• GridSearchCV for hyperparameter optimization
• best_params, best_cv_accuracy

08. 08.micro-task-1.5-model-versioning

• Semantic version folders (1.0.0, 1.1.0…)
• Saved metadata.json
• Model versioning system

09. 09.micro-task-1.6-model-registry-basics

• Structured registry folder for model artifacts
• ModelRegistry abstraction

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10 – 12: API + Dockerisation

10. 10.micro-task-2.1-model-api-python (start deploying your model behind an API)

• Python Model API (FastAPI)
• /predict and /health endpoints
• Model registry integration

11. 11.micro-task-2.2-dockerize-python-model-api

• Dockerfile + containerised inference
• Dockerized FastAPI service

12. 12.micro-task-2.3-docker-compose-fastify-python-api

• Full stack running via docker-compose
• Fastify gateway + Python API

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13 – 15: Production Behaviours

13. 13.micro-task-2.4-logging-request-tracing

• requestId propagation Fastify → Python
• Structured logging across services

14. 14.micro-task-2.5-api-keys-authentication-fastify

• X-API-Key enforcement for protected endpoints
• API key authentication layer

15. 15.micro-task-2.6-model-registry-volume-auto-discovery

• Docker volume for models
• Python auto-discovers versions
• Fastify exposes /admin/models & /admin/models/latest

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How to Use This Repository

Each micro-task can be run independently:

cd "<micro-task-folder>"
docker compose up --build