https://emmycodes.site/blog Guides by Emmanuel Ngene on building web and mobile apps that hold up in production. en https://emmycodes.site/blog/scalable-rest-api-design https://emmycodes.site/blog/scalable-rest-api-design Pagination, timeouts, idempotency keys, rate limiting and caching: the API design decisions that keep a Node.js or NestJS backend standing on launch day. Backend Sat, 17 Oct 2026 09:00:00 GMT emmanuelngene145@gmail.com (Emmanuel Ngene) https://emmycodes.site/blog/database-schema-design-mistakes https://emmycodes.site/blog/database-schema-design-mistakes Money as floats, timestamps without time zones, missing indexes and locking migrations: PostgreSQL and MongoDB schema mistakes, and the cheap fixes. Databases Sat, 17 Oct 2026 09:00:00 GMT emmanuelngene145@gmail.com (Emmanuel Ngene) https://emmycodes.site/blog/authentication-web-mobile-apps https://emmycodes.site/blog/authentication-web-mobile-apps How to hash passwords, choose between sessions and JWTs, rotate refresh tokens and store them safely in browsers and React Native apps. Security Sat, 17 Oct 2026 09:00:00 GMT emmanuelngene145@gmail.com (Emmanuel Ngene) https://emmycodes.site/blog/core-web-vitals-react https://emmycodes.site/blog/core-web-vitals-react A practical guide to faster React, Next.js and Vite sites: what LCP, INP and CLS measure, and the fixes that improve each one. Frontend Sat, 17 Oct 2026 09:00:00 GMT emmanuelngene145@gmail.com (Emmanuel Ngene) https://emmycodes.site/blog/handover-ready-code-checklist https://emmycodes.site/blog/handover-ready-code-checklist README, environment variables, migrations, tests, CI, decision records and account ownership: what a clean software handover needs. Process Sat, 17 Oct 2026 09:00:00 GMT emmanuelngene145@gmail.com (Emmanuel Ngene)