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I will optimize slow nodejs apis and postgresql queries
Bryan Huu Bui
About this gig
Is your Node.js API slow or are PostgreSQL queries holding back your application?
I help diagnose and resolve backend performance bottlenecks in Node.js/TypeScript applications and PostgreSQL databases.
I work on production e-commerce systems and have contributed to reducing API response times by ~40% and speeding up a 73,000-order sync from 60 minutes to 2 minutes.
What I can help with:
- Slow API endpoints and high response times
- Inefficient SQL queries, indexing, and execution plans
- Unnecessary database calls and processing bottlenecks
- Targeted fixes with before-and-after measurements
Choose your package:
- Basic: Audit 1 endpoint OR query; report and recommendations only.
- Standard: Audit and fix 1 agreed bottleneck.
- Premium: Fix up to 3 agreed bottlenecks, with tests and documentation.
Please message me before ordering to confirm the issue, access requirements, and scope. Improvements depend on the root cause; no fixed speed increase is guaranteed.
I use safe, non-production testing where possible. Please do not send passwords or sensitive customer data.
Get to know Bryan Huu Bui
Bryan Huu Bui
Software Engineer
- FromVietnam
- Member sinceAug 2026
Languages
English, Vietnamese
Hi, I'm Bang, a Software Engineer specializing in full-stack development, backend performance, and e-commerce systems.
I build reliable web applications using Next.js, React, Node.js, TypeScript, PostgreSQL, and AWS.
My production experience includes optimizing API response times by 40%, improving large-scale order synchronization, and developing serverless APIs.
I can help you fix slow applications, optimize databases, integrate APIs, and build maintainable web solutions.
My Portfolio
FAQ
What do you need before starting?
Please share the affected endpoint or query, a description of the issue, relevant logs or metrics, and safe access to the code or test environment. We will agree on the scope before work begins.
Can you guarantee a specific performance improvement?
No. Performance gains depend on the root cause, architecture, workload, and infrastructure. I will provide measurable before-and-after results where reproducible, and explain any remaining limitations.
What is the difference between the three packages?
Basic includes a diagnostic report for one endpoint or query, without code changes. Standard includes one agreed performance fix. Premium covers up to three agreed bottlenecks, plus tests and documentation.
Do you work with technologies other than Node.js and PostgreSQL?
I primarily work with Node.js, TypeScript, JavaScript, and PostgreSQL. I also have experience with Next.js, Fastify, Redis, and AWS. Please contact me before ordering for other technology stacks.
Will you need access to my production database?
Not necessarily. I prefer sanitized logs, query plans, sample data, and staging environments. Please do not share production passwords or sensitive customer information. Any production changes require separate agreement.
