M Hamza Toor

@classy_design4u

4.9(149)

Level 1

AI Engineer building RAG Chatbots, AI Agents and Startup MVPs

Pakistan

English, Urdu, Punjabi

About me

AI Full-Stack Engineer with 4+ years building production backends, APIs, and AI-powered apps using Python, Ruby on Rails, and LangChain. I build RAG chatbots, AI agents, semantic/visual search, and rapid MVPs for founders who need to validate fast. Recently built a RAG-based search engine and visual search for a car marketplace platform, plus an AI CV-screening tool. Full-stack: FastAPI, Rails, React, PostgreSQL, OpenAI/Stripe/PayPal integrations. Message me with what you're building - I'll tell you honestly if it's a fit.... Read more

Skills

M Hamza Toor

$20/hour

Offline •

Average response time: 1 hour

See my services

Logo Design

I will be your best online logo maker

4.9(67)

Social Posts & Banners

I will design motivational and success quotes in 12 hours

4.8(52)

Want to work on an hourly basis?

Tell M Hamza Toor what you need.

$20

hour

Work experience

AI Full-Stack Engineer

OTOZ • Full-time

Feb 2025 - Present • 1 yr 8 mos

Designed and developed scalable backend systems using Ruby on Rails, ensuring high performance and maintainability. Built and integrated AI-powered features using OpenAI and modern GenAI tools (RAG, vector databases, prompt engineering). Developed and consumed RESTful and GraphQL APIs for seamless system integrations. Implemented background job processing with Sidekiq and Redis to optimize performance. Integrated third-party services including payment gateways (Stripe) and external APIs. Designed secure authentication and authorization systems following best practices. Collaborated cross-functionally to deliver end-to-end solutions from concept to production.

ROR Developer

techcreatix • Full-time

Jul 2023 - Dec 2024 • 1 yr 5 mos

Designed and implemented end-to-end solutions using Ruby on Rails, including API development, database modeling, and deployment. Integrated third-party services like Stripe, OpenAI, and WhatsApp to enhance application functionality. Developed AI-driven features using OpenAI models, including custom training and prompt engineering. Deployed applications on Render and Heroku, ensuring seamless production rollouts. Conducted code reviews and maintained best coding practices for scalable and high-performance codebases. Gained intermediate-level expertise in React.js for front-end development and state management. Built and maintained Ruby on Rails applications with a focus on secure authentication, API integrations, and database management.Implemented background job processing using Sidekiq and Redis to enhance application performance. Collaborated with cross-functional teams to deliver high-quality, scalable solutions.

Software Engineer

Cyber Nest • Full-time

Jan 2023 - May 2023 • 4 mos

Developed seamless UI integrations using HTML, CSS, JavaScript, and ReactJS in collaboration with designers. Managed efficient data storage using relational databases including PostgreSQL and MySQL. Implemented background job processing with Sidekiq and Delayed Job to enhance application performance. Integrated digital signature APIs (Wacom) for secure and reliable signature functionality. Implemented the Classy API to retrieve filtered transaction data by ID, donor, or campaign.