I will fix and optimize your nodejs API, backend and database performance

T
toseef_hasan
T
toseef_hasan
Toseef Hasan
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fix and optimize your nodejs API, backend and database performance
Volledig scherm
fix and optimize your nodejs API, backend and database performance
Volledig scherm
Volledig scherm
fix and optimize your nodejs API, backend and database performancefix and optimize your nodejs API, backend and database performancefix and optimize your nodejs API, backend and database performance

Over deze dienst

Is your Node.js API slow or crashing under load?

Are MongoDB or PostgreSQL queries taking too long?

Is your backend struggling with high traffic?


I will fix, debug, and optimize your Node.js backend and database for improved speed, stability, and scalability.


What I Can Improve

  • Fix slow Node.js APIs
  • Optimize MongoDB / PostgreSQL queries
  • Add proper indexing and remove bottlenecks
  • Fix N+1 query issues
  • Implement Redis caching
  • Improve API response time
  • Reduce server CPU usage
  • Prepare the backend for high traffic


Performance Improvements You Can Expect

  • Faster API response time (50 - 300% improvement possible)
  • Reduced database load
  • Better handling of concurrent users
  • Clean, scalable backend architecture


My Experience

I have architected backend systems that process large medical documents (100 - 400 pages) with sub-second response times and built high-throughput microservices to handle heavy traffic.


Tools I use:

  • Node.js Profiler
  • MongoDB Performance Advisor
  • PostgreSQL EXPLAIN ANALYZE
  • Redis caching strategies
  • Load testing & benchmarking


Before Starting

Please message me first so I can review your backend and suggest the best optimization plan.

  • Programmeertaal

    • JavaScript

  • Expertise

    • Algoritmen en gegevensstructuren
    • Prestaties
    • Beveiliging
    • Databases
    • Broncontrole

  • Frontend-framework

    • Next.js
    • React.js
    • Tailwind CSS

  • Backend-framework

    • Express.js
    • NestJS
    • Next.js
    • Node.js

  • AI & low/no code bouwers

    • Cursor

Maak kennis met Toseef Hasan

Toseef Hasan

Senior Full Stack Developer NodeJS NestJS React SaaS Architect

  • Afkomstig uitPakistan
  • Lid sindsfeb 2026
  • Gem. reactietijd1 uur

  • Talen

    Urdu, Engels
Hi, I’m Toseef, a Senior Full-Stack Engineer & Tech Lead with 7+ years of experience building scalable SaaS platforms, marketplaces, and backend-heavy systems for startups and international clients. I specialize in Node.js, NestJS, React, and Next.js, with a strong focus on clean architecture, performance, and long-term scalability. I’ve led development teams, designed microservices-based systems, integrated secure payment flows (Stripe & subscriptions), and delivered production-grade applications across fintech, healthcare, and Web3-enabled platforms.

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