You will get Node.js Backend Developer for API Performance/bug Fixes
Project details
I help diagnose and fix Node.js backend performance bottlenecks without requiring a major rewrite of your existing architecture. Whether your backend is built with Node.js, TypeScript, Express.js, PostgreSQL, MongoDB, MySQL, or Redis, I can review the existing code, identify the root causes of slow API responses, and implement targeted optimizations.
My approach focuses on finding bottlenecks in REST API endpoints, optimizing PostgreSQL/MongoDB/MySQL queries, improving Redis caching, eliminating unnecessary or repeated database requests, and improving API error handling. I’ll test the affected endpoints after making the changes and document the key improvements so you have a clear understanding of what was fixed and why.
What I can help with:
Review existing backend code
Identify bottlenecks in REST API endpoints
Optimize db queries
Improve caching where appropriate
Fix unnecessary or repeated database requests
Improve API error handling and response performance
Test and compare affected endpoints after optimization
Document the main changes and performance improvements
My approach focuses on finding bottlenecks in REST API endpoints, optimizing PostgreSQL/MongoDB/MySQL queries, improving Redis caching, eliminating unnecessary or repeated database requests, and improving API error handling. I’ll test the affected endpoints after making the changes and document the key improvements so you have a clear understanding of what was fixed and why.
What I can help with:
Review existing backend code
Identify bottlenecks in REST API endpoints
Optimize db queries
Improve caching where appropriate
Fix unnecessary or repeated database requests
Improve API error handling and response performance
Test and compare affected endpoints after optimization
Document the main changes and performance improvements
Programming Languages
JavaScript, Python, TypeScriptWhat's included $99
These options are included with the project scope.
$99
- Delivery Time 2 days
- Number of Revisions 1
- Bug Investigation
- Fix Documentation
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Pf
Pablo f.
Nov 2, 2021
FBA wholesale products and managing
About Walid
AI Automation Developer | n8n, AI Agents & RAG Systems
Peshawar, Pakistan - 5:34 am local time
I build AI agents, n8n automations, RAG systems, and Node.js/Python backends for startups and agencies.
Whether you need to automate lead handling, connect business tools through APIs, build an internal AI assistant, improve an existing RAG pipeline, or turn an AI idea into a working MVP, I focus on reliable architecture, clear error handling, and maintainable delivery.
What I can build
• AI agents and LLM workflows using OpenAI, Claude, Gemini, LangChain, and LangGraph
• RAG applications with Pinecone, pgvector, or Chroma for document search and AI assistants
• n8n workflows with APIs, webhooks, OAuth, retries, error handling, and human approval steps
• CRM and business automation for GoHighLevel, HubSpot, Salesforce, and third-party tools
• Node.js/Express and Python/FastAPI APIs, integrations, background workers, and backend
services
• Database and deployment setups using PostgreSQL, MongoDB, Redis, Docker, AWS, GCP, or Vercel
How I approach projects
• Start by understanding the workflow, users, integrations, and success criteria
• Build a practical solution with clean, maintainable code
• Add logging, error handling, retries, and monitoring where the workflow requires it
• Provide documentation and a Loom handover walkthrough
Relevant experience
I have 5+ years of backend and SaaS development experience, including API-driven applications, cloud storage, database optimization, automation workflows, and customer-support chatbot integrations. I use that backend foundation to build AI systems that are dependable, secure, and ready to evolve with your business.
If you have an automation bottleneck, an AI concept, or an existing workflow that needs improvement, send me the details. I’ll help you define a practical first milestone and implementation plan
Steps for completing your project
After purchasing the project, send requirements so Walid can start the project.
Delivery time starts when Walid receives requirements from you.
Walid works on your project following the steps below.
Revisions may occur after the delivery date.
First i will inspect the backend according to the user query