AverageDevs - Real-World Web Dev Guides for Working Developers
Zero-Downtime Database Migrations for TypeScript SaaS: Expand, Backfill, and Cut Over Safely
A practical production guide to zero-downtime database migrations in TypeScript SaaS systems, covering expand-contract changes, dual writes, backfills, observability, and rollback-safe rollouts.
Database Transactions and Concurrency Control in TypeScript APIs
A comprehensive guide to handling race conditions, isolation levels, optimistic concurrency, and pessimistic locking in production TypeScript backends.
Designing Multi-Tenant SaaS Isolation: Data, Controls, and Cost Guardrails
Hands-on playbook for building a secure, noisy neighbor resistant multi-tenant SaaS: partitioning models, request routing, per-tenant controls, cost-aware observability, and rollout tactics that respect compliance.
Database Indexing Strategies Every Backend Developer Should Know
A practical guide to B-tree, composite, partial, and covering indexes for real-world backend APIs, with SQL examples, query plans, and mental models that scale.
A Beginner's Guide to REST vs GraphQL APIs - When to Use Which
A practical, engineering-first comparison of REST and GraphQL for web apps - concepts, performance, caching, pagination, errors, schema evolution, security, real time, and TypeScript examples.
Vector Databases for Semantic Search: Pinecone vs Weaviate vs Chroma (with TypeScript examples)
A developer’s guide to vector databases for semantic search: how embeddings work, when to use Pinecone, Weaviate, or Chroma, and how to build a Next.js/Node pipeline for ingestion and hybrid retrieval with TypeScript code.