Backend

Languages, when to use Node vs Python, databases, ORMs, and shared conventions.

Bootstrap Express + TypeScript, configure env, and run locally.

Standard Express layout — routes, controllers, services, and middleware.

Bearer tokens, Cognito validation, scopes, and rate limits.

Bootstrap FastAPI with uv, configure env, and run with Uvicorn.

Standard FastAPI layout — routers, dependencies, services, and schemas.

Cognito JWT validation, OAuth2 scopes, and rate limiting.

Node — Sequelize models, migrations, associations, and seeding.

Node — Drizzle schema, type-safe queries, and migration workflow.

Python — SQLAlchemy 2.0 models, Alembic migrations, and async sessions.

Mongoose (Node) and Motor/Beanie (Python) — models and document patterns.

Supabase client, Postgres via Supabase, RLS, and realtime.

WebSocket server, rooms, auth, and client integration.

Object storage, presigned uploads, and file access patterns.

Firebase Cloud Messaging for web, iOS, and Android push notifications.

Transactional email via AWS SES, SendGrid, and Brevo.

Multi-stage Dockerfile, compose for local, and image publishing.

ECS task definitions, services, rolling deploys, and rollback.