Pagination That Scales: Offset vs Cursor vs Keyset
Trade-offs, pitfalls, and production-ready code with SQL, Node, FastAPI, MongoDB and Elasticsearch examples.
Tiny explainers grouped by topic. Spend less time Googling, more time building.
Trade-offs, pitfalls, and production-ready code with SQL, Node, FastAPI, MongoDB and Elasticsearch examples.
A battle‑tested checklist and patterns: allowlists, size limits, magic‑byte checks, streaming to object storage, virus scanning, image/PDF sanitization, signed URLs, and safe download headers.
UTC vs local time, offsets vs zones, DST edge cases, ISO 8601/RFC 3339, DB column types, and sane patterns in JS/Python/SQL. How to store, compare, schedule, and display time without pain.
A quick, practical explainer of idempotency: what it means, how HTTP methods relate, and how to implement idempotent POSTs with idempotency keys to make retries safe.
The practical trade‑offs: when a monolith (or modular monolith) is the right call, when microservices pay off, and how to evolve without pain.
A fast primer on in-memory, distributed, and CDN caching—what they are, when to use each, and how they boost latency, throughput, and cost efficiency.
A high-level comparison of relational and non-relational databases with common use cases for each.
A simple explainer of API gateways—how they centralize auth, rate limiting, routing, and observability—and when to adopt one versus calling services directly.
A quick, practical guide to choosing between REST, GraphQL, and gRPC for new and existing services.