I will fix and optimize your slow nodejs api and sql database queries

Is your Node.js API slow, throwing 500s, or falling over under load? Send it to me.

WHAT I FIX

• Slow endpoints and slow SQL queries: missing indexes, N+1 queries, full table scans
• - Timeouts, memory leaks and crashes under traffic
• - Race conditions and duplicate records
• - Broken auth, sessions, CORS and webhooks
• - Deployments failing on Cloud Run, Lambda or EC2

WHAT YOU GET

• The root cause explained in plain language, not just a patch
• - The fix applied in your codebase, in your style
• - Before and after numbers wherever it can be measured
• - A short note on what to watch next

WORKS WITH

Node.js, NestJS, Express, TypeScript, Ruby on Rails, PostgreSQL, MySQL, Redis, Firestore.

RECENT WORK

I keep a live booking platform stable at around 10,000 concurrent users during sale peaks: Redis caching with fail-open behaviour so a cache outage never blocks a booking, slow query patterns removed, composite indexes added, and double-booking killed with a database-level unique constraint.

BEFORE YOU ORDER

Message me with the error, the slow endpoint, or repo access. I will tell you honestly whether I can fix it, how long it takes and what it costs. If I cannot help, I will say so.