I will optimize slow sql queries or fix node js API errors

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handy_ban
Handy Ban
optimize slow sql queries or fix node js API errors
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optimize slow sql queries or fix node js API errors

About this gig

Are slow database queries or backend crashes hurting your user experience?

I specialize in full-stack performance tuning and backend debugging, specifically focusing on building and optimizing high-throughput database systems. I will quickly find your backend bottlenecks and make your application fast and stable.

What I Can Do For You:

  • SQL Server Optimization: Rewrite slow queries, optimize complex joins, fix views, and repair stored procedures.
  • Database Tuning: Analyze execution plans, establish proper table indexes, and fix performance lags.
  • Node.js API Debugging: Resolve routing bugs, handle 500 internal errors, and optimize server middleware.
  • React Data Integration: Troubleshoot data-mapping issues, component lifecycle delays, and state errors.

Why Choose Me?

  • Production-ready, clean, and highly optimized code.
  • Quick, reliable turnaround to get your application back on track.
  • Clear, transparent comm

  • Programming language

    • JavaScript

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Localization
    • Performance
    • Security

  • Frontend framework

    • AngularJS
    • Flutter
    • React.js

Get to know Handy Ban

Handy Ban

SaaS Builder, Algorithmic Trading Developer

  • FromIndonesia
  • Member sinceJul 2026
  • Avg. response time1 hour

  • Languages

    English, Indonesian, Chinese
Hi, I'm Handy! A Software Engineer & Computer Scientist with 18+ years of experience. I specialize in turning ideas into production-ready software, shipping SaaS, mobile apps, and automated trading systems. What I offer: • Next.js SaaS Platforms (TypeScript, Node.js) • Mobile Apps (Flutter, Dart) • Algorithmic Trading EAs (MQL5, MT5) • Custom AI & Database Integrations With a B.S. in Computer Science and experience building industrial ERPs, I focus on clean code, security, and rapid 7-day MVP delivery. Let’s build your product!

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