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Hamza Khan

@hamzadev

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AI Full Stack Developer | Ruby on Rails Expert | GPT & ML Integrations | Python | AWS

Pakistan

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Senior AI + Full Stack Engineer with over 10 years of commercial experience building scalable, production-grade web applications using Ruby on Rails, AWS, and modern JavaScript stacks. I’ve led engineering across SaaS platforms processing 150,000+ daily requests, optimized performance at scale, and built full pipelines from integrations to customer experience.

Recently integrated AI into enterprise-grade products — building GPT-4 powered chat workflows, auto-reply systems, and internal tooling using LangChain, OpenAI APIs, and Python. I’m highly experienced in RESTful API design, external platform integrations (Yardi, RentCafe, Entrata, Resman, WelcomeHome), and building internal tools for marketing automation, analytics, and guided user journeys.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Hy.ly

May 2021 - Jul 2025 (4 years 2 months)

Built and maintained large-scale features handling 150K+ requests/day in production, supporting PropTech integrations. Led development of AI-enhanced tools, including chatbot algorithms for guided property tours using GPT-style APIs.

Ruby on Rails MongoDB Python AWS GPT 4 APIs Sidekiq Redis Resque Salesforce Yardi

Sr. Software Engineer

Gigalabs

Jul 2019 - May 2021 (1 year 10 months)

Delivered production-ready apps for clients in e-commerce, edtech, and surveillance industries. Built custom CMS systems, integrated PayPal/Stripe, and developed client dashboards using Angular & React.

Angular React Python DevOps PayPal Stripe Git

Ruby On Rail Developer

XoHo Tech, Inc

Feb 2017 - Jun 2019 (2 years 4 months)

Built and maintained full-stack features for industrial IoT and factory automation systems. Worked on a custom ERP and inventory management solution for manufacturing clients.

Ruby on Rails Spree Commerce API Development Sidekiq Database Performance Tuning

Ruby On Rails Developer

BigInt

Jun 2014 - Jan 2017 (2 years 7 months)

Built full-stack modules for enterprise dashboards and data processing using RoR and React. Worked on backend services processing real-time data feeds, including campaign tracking and funnel analytics.

Ruby on Rails React Python AWS EC2 PostgreSQL CI CD

Senior Software Engineer

Hy.ly

May 2021 - Present (4 years 3 months)

ResMan Ruby on Rails MongoDB Python AWS GPT 4 APIs Sidekiq Redis Resque Resman RentCafe WelcomeHome Salesforce ResMate Yardi

Sr. Software Engineer

Gigalabs

Jul 2019 - Present (6 years 1 month)

Delivered production-ready apps for clients in e-commerce, edtech, and surveillance industries. Developed Python-based object detection and classification pipelines for a school security project using AI.

Angular React Python DevOps PayPal Stripe Git

Ruby On Rail Developer

XoHo Tech, Inc

Feb 2017 - Present (8 years 6 months)

Built and maintained full-stack features for industrial IoT and factory automation systems. Gained hands-on experience with Spree Commerce, customizing storefronts, product logic, and order flows.

Ruby on Rails Spree Commerce ERP Inventory Management API Development Sidekiq

Ruby On Rails Developer

BigInt

Jun 2014 - Present (11 years 2 months)

Built full-stack modules for enterprise dashboards and data processing using RoR and React. Designed and maintained AWS EC2 infrastructure, CI/CD pipelines, and PostgreSQL backups.

Ruby on Rails React Python AWS EC2 CI CD PostgreSQL Data Analytics

Education

Degrees, certifications, and relevant coursework

University of the Punjab

Bachelor of Science (BS), Computer Science

2010 - 2014

Studied Computer Science at the University of the Punjab, focusing on core principles and applications. Completed a comprehensive curriculum in the field.