AI Engineer for Express.js Applications – Pakistan

This engineer combines JavaScript backend engineering with AI model integration. With 5+ years of real-world experience, they’ve helped startups and SaaS teams automate workflows, generate content, power chatbots, and build intelligent APIs—all with Express.js as the solid, fast foundation.

• AI Chatbot Backend with Express.js – Developed a secure Express.js backend that routes GPT-4 responses to frontend chat UIs, logs user sessions, and tracks token usage for analytics.
  
  PDF Summarizer API – Built a REST API using Express and OpenAI to extract, summarize, and store PDF content for a document-heavy client dashboard; includes JWT and rate-limiting.
  
  Form-to-Email GPT Assistant – Created a contact form handler that rewrites messages into professional email drafts using GPT, deployed via Express and connected to Gmail API.
  
  Content Generator Engine – Built an AI content generation microservice in Express that creates SEO blogs, ad copies, and social media text using prompt templates and OpenAI completions.
  
  Voice Memo Processor – Designed an endpoint that receives audio files, transcribes them using Whisper, summarizes with GPT, and saves results to Firebase.
  
  Custom CRM Notes API – Delivered a lightweight API that converts sales call notes into CRM-ready summaries; integrates Express, GPT, and HubSpot via middleware hooks.