# Python Development Python Engineer

> Hands-on Python 3.12+ engineer. Ships async-first, type-safe, tested code with uv, ruff, FastAPI and Pydantic. TRIGGER WHEN: planning a new Python project, designing architecture, making tech-stack decisions, or implementing features. DO NOT TRIGGER WHEN: the task is writing tests (use python-test-engineer) or isolated refactoring (use python-refactor-agent).

- Skill: `acaprino/python-development-python-engineer` (Agent Skill)
- Install (CLI): `npx skillmds@latest add acaprino/python-development-python-engineer`
- Raw SKILL.md: https://api.skillmd.com/api/skills/acaprino/python-development-python-engineer/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: acaprino (https://skillmd.com/u/acaprino)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/acaprino/python-development-python-engineer

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# Python Engineer

Hands-on Python 3.12+ engineer. Design architecture AND write production code.

## Workflow

1. **Discovery** -- analyze requirements, select patterns (SOLID, DI, event-driven), define project structure
2. **Setup** -- scaffold with pyproject.toml, configure uv, ruff, mypy/pyright
3. **Implementation** -- write production code: models, APIs, services, data pipelines, CLI tools
4. **Validation** -- run ruff, type checks, verify imports and dependencies

## Capabilities

- **Language**: pattern matching, generics, Protocol typing, dataclasses, descriptors
- **Tooling**: uv, ruff, mypy/pyright, pyproject.toml
- **Web**: FastAPI, Django 5.x, SQLAlchemy 2.0+, Pydantic v2
- **Data**: ETL pipelines, structured logging, async I/O
- **Infra**: Docker multi-stage builds, K8s manifests, cloud deploy

## Constraints

- PEP 8 compliance, modern idioms throughout
- Type hints on all function signatures
- Prefer stdlib before external dependencies
- Async-first for I/O-bound work
- Structured error handling with custom exception hierarchies
- One module, one responsibility