Open to opportunities

Humayun Sarfraz

@humayunsarfraz

Message

Full-stack AI engineer building LLM, RAG, and automation systems for real impact.

Pakistan

Message

What I'm looking for

I’m looking to build production LLM/RAG products and reliable AI automation workflows—turning business needs into scalable APIs, measurable KPIs, and continuous improvements through strong engineering practices.

I’m a Full-Stack AI Engineer with 10+ years of software development experience, focused on building LLM-powered applications, RAG systems, and AI automation workflows. I translate business requirements into scalable AI solutions that improve operational efficiency, automate workflows, and enhance decision making—using OpenAI integrations, vector search, prompt engineering, and production-ready APIs.

In my recent role, I architect AI solutions for knowledge retrieval, document intelligence, predictive analytics, and business automation. I build scalable AI microservices with FastAPI, integrate enterprise systems through n8n and Lindy.ai (APIs/webhooks/CRMs/Google Workspace automation), and design model training/fine-tuning pipelines with dataset engineering, evaluation, and quality benchmarking—so systems stay reliable in real business processes.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack AI Engineer

Current

SingularityNET

Sep 2023 - Present (2 years 9 months)

Architected LLM-powered knowledge retrieval, document intelligence, predictive analytics, and business automation solutions. Built RAG and semantic search apps and deployed scalable FastAPI microservices with integrations via n8n, Lindy.ai, APIs, and webhooks.

OpenAI API RAG Vector Search Prompt Engineering fastAPI N8n Lindy AI Webhooks

Full-Stack Developer

Digital Deluxe

May 2023 - Aug 2023 (3 months)

Delivered scalable web applications through collaboration with developers, QA, and stakeholders. Optimized PHP applications and built integrations, APIs, and automation solutions supporting business processes and client requirements.

PHP REST APIs Automation Debugging Technical Documentation Testing Web Optimization

Full-Stack Developer

Glixen Technologies

Jan 2018 - Jun 2023 (5 years 5 months)

Architected and developed secure, scalable web applications using PHP, MySQL, REST APIs, React, and Vue.js. Improved code quality and database design via performance tuning, code reviews, QA collaboration, and mentored junior engineers.

PHP MySQL REST APIs React Vue.Js Containerization Code Review Performance Tuning

Full-Stack Engineer

OTW Design

Dec 2016 - Nov 2017 (11 months)

Developed and maintained PHP and JavaScript web applications with RESTful integrations. Built backend functionality, integrated third-party APIs, and improved performance through refactoring, debugging, and testing.

PHP MySQL JavaScript AJAX RESTful APIs Debugging Testing Code Refactoring API Integration

Senior PHP Programmer

6th Senth Studio

Nov 2015 - Oct 2016 (11 months)

Developed and integrated frontend and backend components using PHP, JavaScript, and MySQL for full-stack web solutions. Improved system architecture and performance by troubleshooting bottlenecks and resolving defects, including responsive eCommerce builds with payment gateway integrations.

PHP JavaScript MySQL Frontend Performance Optimization Payment Gateways