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Docs

The docssheet docs are long-form guides that build the mental model for a topic — what it is, why it works the way it does, worked examples, common mistakes, and how it shows up in interviews and on the job. They span Test Automation (SDET), Site Reliability Engineering (SRE), Software Development (SDE), and AI-assisted engineering.

Categories​

  • SDET Skills — Test automation and quality engineering: Playwright, Selenium, Appium, REST Assured, Postman, JMeter, Cucumber/BDD, JUnit, TestNG, Java, SQL, the tooling landscape, and the core QA disciplines (manual, automation, API, performance, security, mobile, accessibility, and AI/LLM testing)
  • SRE Skills — Reliability, observability, and cloud: Kubernetes, AWS, Terraform, cloud infrastructure, CI/CD, Linux administration, system performance, networking, Prometheus & Grafana, OpenTelemetry, chaos engineering, incident response
  • SDE Skills — Software development topics and patterns: Python, Git, Docker, Clean Architecture
  • AI Skills — AI-assisted engineering: working with Claude, Kiro, MCP & AI agents, and AI-assisted workflows

Alongside the tracks, three cross-track sections help you learn a language end to end:

  • Fundamentals — Python, Java, and SQL quick references and coding best practices, from basic to advanced — plus quick references and best practices for eight QA testing disciplines
  • Role Guides — how those fundamentals apply day to day for an SDET, SRE, or SDE
  • Learning Path — ordered roadmaps, syllabi, and weekly mini-projects for Python, Java, SQL, Git, Docker, Kubernetes, and the eight QA testing disciplines

Browse the sidebar to explore each category, or jump to the matching cheat sheet when you just need the syntax.

Top features at a glance​

  • Guides by track — in-depth guides across SDET, SRE, SDE and AI, each opening with a Mental Model diagram.
  • Cheat Sheets — quick-lookup pages with a progress tracker so you can mark what you've covered.
  • Library, Roadmap & Skills Matrix — browse every guide by track, level and reading time, and follow a suggested learning order.
  • Progress Dashboard — see your cheat-sheet progress across topics in one place.
  • 🧠 Mind map — open an interactive map of any guide's headings in one click.
  • Hands-on practice — exercises, case studies and AI ideas on many guides.
  • Light & dark themes, offline-ready — light by default, with a toggle in the navbar, and installable as an app.
Start here5 min
  1. Not sure where to begin? Try Pick Your Focus
  2. Browse every guide by track, level, and reading time in the Library
  3. See a suggested learning order for each track on the Skill Roadmap
  4. Need a quick lookup rather than a full guide? Use the Cheat Sheets
🧭 Mental modelHow the docs are organizedThe docs fan out into four skill categories: SDET, SRE, SDE, and AI Skills, each a self-contained set of guides.docssheet docsone entry point, four tracksSDET Skillstest automation,e.g. PlaywrightSRE Skillsreliability,e.g. KubernetesSDE SkillssoftwaredevelopmentAI SkillsAI-assistedengineering

Every guide sits under exactly one of four tracks — pick the track that matches what you're trying to learn, then use its sidebar to go deep. If you're not sure where a topic lives, it's probably closest to whichever track's example matches your situation.