Building production-grade backend layers from first principles
A comprehensive guide to building resilient, flexible, and maintainable database layers in TypeScript. Each post builds on the previous, taking you from basic abstractions to distributed systems.
- Basic knowledge of TS, databases and sql.
- Node.js: v23 or higher (required for AsyncContext API)
- Docker: For running databases and other external dependencies locally (PostgreSQL, MongoDB, Kafka) - Required only if you want to test with real databases instead of SQLite
Follow Along with the Series Each post has a git tag. Check out the tag to see the code at that stage:
# Clone the repo
git clone https://github.com/arda-e/database-reliability.git
cd database-reliability
# See Post 1 code
git checkout v1-adapterSwap databases without touching business logic. Build once, run anywhere.
Tag : v1-adapter
Abstraction patterns for database independence Connection resilience and retry logic Testing with different databases Environment-specific implementations
Key concept: Your code shouldn't know or care which database it's using.
Manage data consistency without polluting business logic.
Tag: v2-transactions
ACID transactions made simple TypeScript decorators for automatic transaction management Nested transactions and savepoints Testing transactional behavior
Key concept: @Transactional() - atomicity without the ceremony.
Found a bug? Have a better approach? Want to add an example?
- Create a feature branch (git checkout -b feature/amazing-improvement)
- Commit your changes (git commit -m 'Add amazing improvement')
- Push to the branch (git push origin feature/amazing-improvement)
- Open a Pull Request
MIT License - Use this code however you want. Learn from it, improve it, ship it.
If you find this series helpful, give it a star! It helps others discover it.
Questions? Open an issue. Comment under the article.
Let's build something reliable together.
TBA