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I will fix and optimize your nodejs API, backend and database performance
Toseef Hasan
About this gig
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.
Get to know Toseef Hasan
Toseef Hasan
Senior Full Stack Developer NodeJS NestJS React SaaS Architect
- FromPakistan
- Member sinceFeb 2026
- Avg. response time1 hour
Languages
Urdu, English
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.
Other Software Development Services I Offer
FAQ
What if you don't achieve the promised speed improvement?
I guarantee measurable results. If we don't hit agreed-upon targets, I continue optimizing at no extra charge until we do.
Do you need to change our infrastructure?
Usually no—most gains come from code/database optimization first. If infrastructure changes help, I'll recommend cost-effective options (Redis, read replicas), not expensive rewrites.
Can you optimize cloud costs while improving performance?
Yes. I often reduce AWS/GCP bills by 30-50% through better resource utilization—fewer servers doing more work efficiently.
Is there downtime during optimization?
Zero-downtime deployments are standard. Database migrations use shadow tables or online schema changes. I work on staging first, production last.
