Top Tweets for #Fastify
May 8:
Today's goal:
- To migrate my brain from express to fastify
- Share my struggles
- write a blog (maybe)
- Along with building a `Hotel Management Application`
#learningtocodinginbig2026
#WebDevelopment #JavaScript #learninpublic #buildinpublic #backend #express #fastify #javascript #typescript #coding #webdev #developement
Here are my struggles
Shifting from Express → Fastify:
Mental Model Shift
- Thinking in middleware instead of plugins
- Confusion around encapsulation
- Hooks lifecycle feels overwhelming
- Validation/schema-first mindset is new
(but i have used zod so this is relatively easier)
Architecture Confusion
- Too many architecture styles online
- No “one obvious way” to structure projects - Available ways: mvc, modular, file routing-based like next
- Fear of over-engineering before understanding fundamentals
Fastify-Specific Concepts
- Hooks Lifecycles
- Decorating Fastify instances...
- Plugin registration order
(its is the fastify way of doing middlewares)
- TypeScript setup is stricter than Express
Learning Noise / AI Confusion
- Error handling patterns differ everywhere
- AI tutorials constantly contradict each other claude says something, open ai says something, both say different in diff time
- Recreating Express patterns inside Fastify
Unsure if the ecosystem shift is even worth it or am i just framework hoping...
Need more speed from your backend? Fastify delivers high-throughput APIs with low overhead, smart plugins, and blazing performance—built for apps that can’t afford to slow down.
#NodeJS #Fastify #Backend #WebPerformance
https://t.co/xy8VLKI0vz
`Fastify` applications are vulnerable to CVE-2026-33805, allowing attackers to strip proxy-added headers via `Connection` header abuse. This can lead to security control bypasses. #Fastify #WebSecurity #CVE https://t.co/e5w0j0oCDa
`@fastify/express` users: A critical authentication bypass (CVE-2026-33807) due to path doubling affects child plugin scopes. Review usage & monitor for fix. #NodeJS #Fastify #AuthBypass #Infosec https://t.co/kEbGpyd0vE
The `@fastify/express` module is vulnerable to an authentication bypass (CVE-2026-33808) via URL normalization gaps. This may lead to unauthorized access. Monitor for official updates. #Nodejs #Fastify #AuthBypass https://t.co/asKQPFoLA3
Fastify (25M+ downloads) reveals CVE-2026-33806. A public PoC exploit shows how a single space bypasses schema validation. Upgrade to v5.8.5 now to stay safe.
#Fastify #CVE202633806 #NodeJS #CyberSecurity #Exploit #PoC #WebDev #InfoSec
https://t.co/lVNuz3ui1U

🔖 The latest issue of my #newsletter is live, issue 013.
March recap: 12 CVEs across #undici, #Fastify, #Lodash & #pathtoregexp, a state-actor supply chain attack on #axios, and the #Nodejs security bug bounty paused 🔐
https://t.co/SEfevWEl1n
Stack: #TypeScript, #React 18, #Fastify, #Playwright, #SQLite, #Drizzle ORM, #pnpm monorepo.
No cloud. No subscription.
Docs: https://t.co/pLPbQBs4PL
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