rabbitmq
Coupling in distributed systems goes far beyond shared code: technology, location, semantic, data format, conversation, topology, order, and temporal coupling each hurt resilience differently. What every type looks like and how to keep services independent.
monolith
Monolith, microservices, or serverless? A side by side comparison of how each backend architecture handles scaling, development speed, deployment, and cost, where each one breaks down in practice, and a summary that helps you pick the right fit for your project.
pagination
Database pagination goes beyond LIMIT and OFFSET: ROW_NUMBER(), the FETCH clause, and keyset pagination each behave differently as tables grow. SQL examples for every approach, why offsets get slow on big datasets, and a verdict on which method scales best.
Database sharding in Rails step by step: create a separate database per shard, wire them up in database.yml, and query across them. Plus how sharding differs from partitioning, with a native PostgreSQL partitioning example done through Rails migrations.
Domain Driven Design in Ruby with a working example: aggregates, entities, value objects, and repositories built around a ProductCatalog, then extended with event-driven design and event sourcing, where projections rebuild state from events instead of a database.