Engineering Handbooks & Tech Stacks (12)
Companies that publish detailed engineering handbooks or dedicated documentation of their tech stack, architecture decisions, and tooling choices.
| Company | URL | Stack Highlights |
|---|---|---|
| PostHog | posthog.com/handbook/engineering/stack | Frontend: React, Redux, Kea, Ant Design. Backend: Django, Rust. Data: PostgreSQL, ClickHouse, Redis, Kafka. Orchestration: Celery, Temporal, Dagster. CI: GitHub Actions, Playwright, Pytest. |
| Infobip | GitBook handbook | Full engineering handbook: tech stack & architecture, code & deploy practices, observability, self-managed teams, career dev. 40+ datacenters worldwide. |
| Wise | 2025 Stack Update | Backend: Java, Kotlin. Frontend: Next.js (CRAB), React. Mobile: Kotlin/Compose, Swift, KMP. Data: MariaDB, PostgreSQL, MongoDB, Redis, Snowflake, Iceberg. Infra: K8s (RKE2), Terraform, ArgoCD, Envoy. ML: SageMaker, MLflow, Ray Serve. LLMs: Claude, Bedrock, Gemini. Observability: LGTM stack. |
| Artsy | GitHub README | React, Relay, TypeScript, GraphQL, Palette design system. Open Source by Default. |
| Figma | Engineering blog · Values | Frontend: React, TypeScript, C++. Backend: Ruby, Go, TypeScript. LiveGraph (custom real-time DB). |
| Microsoft ISE | Engineering Playbook · GitHub | Open-source playbook. React, TypeScript recommended. Covers design reviews, CI/CD, observability, testing. |
| Raycast | Public docs | Vue.js, Gridsome, Vercel. Node.js, Express, Heroku. Linear, GitHub, Slack, Notion. |
| dwyl | GitHub | PETAL stack: Phoenix, Elixir, Tailwind, Alpine.js, LiveView. PostgreSQL. Detailed rationale with diagrams. |
| Spotify | Engineering blog · Backstage | Created Backstage (CNCF internal developer portal). Tech Radar plugin. Core principle: "The fewer technologies we are world class on, the faster we get." |
| Canva | canva.dev/engineering | Backend: Java, Kotlin, Python, Scala. Frontend: React, TypeScript. Data: Snowflake (25+ PB, 90M queries/month). |
| Uber | Tech Stack Part I · Part II | Python, Go, Java, Node.js. Schemaless (custom on MySQL), Riak, Cassandra. Docker, Mesos, Aurora. |
| Mercury Works | GitHub Pages | Dev handbook: culture, code style, UX design, front-end, back-end. |
Best for stack documentation: PostHog (dedicated /engineering/stack page), Wise (periodic Tech Stack Update posts with 60+ technologies), Infobip (full GitBook engineering handbook), Uber (two-part blog series).