Hafiz Haseeb Ahmed, Developer in Bahawalpur, Punjab, Pakistan
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Hafiz Haseeb Ahmed

Bio

Hafiz is a full-stack developer with more than four years of experience developing robust applications for high-volume businesses in an agile environment. He is a problem-solving team player with a can-do attitude and phenomenal communication skills. Hafiz has been working as a remote independent contractor with companies all over the globe.

Portfolio

Revelo
AI Model Training, Algorithms, Web App Development...
OpenAI
Python, Python 3, JavaScript, APIs, REST, C++, Next.js, React, TypeScript...
Boxeyi.com
Django, Python 3, REST APIs, Data Science, Bootstrap, PostgreSQL...

Experience

  • JavaScript - 4 years
  • Django - 4 years
  • Python - 4 years
  • Bootstrap - 3 years
  • Data Structures - 3 years
  • Algorithms - 3 years
  • WebSockets - 2 years
  • IT Project Management - 2 years

Preferred Environment

Windows, PyCharm, Next.js, React, TypeScript

The most amazing...

...thing I've developed is a web app for Hovertise to manage and communicate with IoT-connected screens on car tops.

Work Experience

AI Trainer and Technical Evaluator

2026 - PRESENT
Revelo
  • Evaluated full-stack TypeScript and React applications by testing user flows, checking implementation quality, and identifying correctness, UI, and production-readiness issues.
  • Generated realistic interaction data for large language model (LLM) training by guiding coding agents through multi-step web application tasks and reviewing their behavioral patterns.
  • Reviewed model outputs across logic, error handling, modularity, interface design, documentation, and verification discipline to improve training signal quality.
  • Validated Docker-based development workflows by checking repository setup, build behavior, test execution, and final project readiness before submission.
  • Assessed AI-generated code for common failure modes such as hallucinated APIs, incomplete implementation, overscoping, weak verification, and poor file organization.
  • Created structured evaluation feedback with clear pros, cons, behavioral issue codes, and preference justifications for side-by-side model response comparisons.
  • Tested end-to-end app behavior, including authentication, CRUD flows, persistence, front-end/back-end integration, loading states, validation, and error handling.
  • Worked within Linux-style developer environments using VS Code, Git, Docker, terminal tooling, and repository-level debugging to complete technical evaluation tasks.
  • Improved LLM training datasets by producing high-quality human feedback focused on practical software engineering, debugging, and production-readiness signals.
Technologies: AI Model Training, Algorithms, Web App Development, Large Language Models (LLMs), LLM Evaluations, Data Annotation, JavaScript, TypeScript, React, Node.js, Docker, Visual Studio Code (VS Code), Git, Debugging, Full-stack Development, Full-Stack Web App Evaluation, Code Review, Quality Assurance (QA), Behavioral Data Evaluation

Python Trainer

2022 - PRESENT
OpenAI
  • Spearheaded the initial Python training efforts for ChatGPT at OpenAI, contributing foundational knowledge and techniques that enabled its successful public launch in November 2022.
  • Developed and integrated custom plugins to expand ChatGPT’s domain coverage, improving real-time response accuracy and enhancing user experience across financial, healthcare, and developer-focused APIs.
  • Collaborated with AI researchers and product teams to optimize training workflows, resulting in a measurable 25% improvement in model performance and response quality across key benchmarks.
Technologies: Python, Python 3, JavaScript, APIs, REST, C++, Next.js, React, TypeScript, Artificial Intelligence (AI), Data Extraction, GraphQL, Cloud Infrastructure, Java, Large Language Models (LLMs), Rust, AI Model Training, Cybersecurity, Debugging

Director of Technologies and People

2022 - 2023
Boxeyi.com
  • Initialized and managed the Xtriven app for drivers to earn more by advertising their vehicles to local advertisers.
  • Streamlined the team's work and design using Figma, Trello, and Cliq.
  • Interviewed and hired new developers for the company.
Technologies: Django, Python 3, REST APIs, Data Science, Bootstrap, PostgreSQL, Web App Development, Amazon Web Services (AWS), DevOps, HTML5, Relational Databases, APIs, Software Architecture, Linux, Tailwind CSS, Google Cloud Platform (GCP), Next.js, React, TypeScript, Artificial Intelligence (AI), Data Extraction, Minimum Viable Product (MVP), GraphQL, Cloud Infrastructure

Product Engineer

2020 - 2022
Boxeyi.com
  • Developed a web app that communicates with IoT-connected screens, records location data, and can play different advertisement pictures or videos based on the location.
  • Designed a layout and workflow using Figma and Trello to manage and assign tasks.
  • Automated the company's different operations and designed a portal for the salespeople.
Technologies: Django, Python, PostgreSQL, HTML, Python 3, Web App Development, Embedded Systems, Amazon Web Services (AWS), DevOps, HTML5, REST APIs, Relational Databases, APIs, Software Architecture, Linux, Tailwind CSS, Google Cloud Platform (GCP), React, Minimum Viable Product (MVP), GraphQL, Cloud Infrastructure

Django Developer

2019 - 2020
Thinkgroupy
  • Participated in developing a platform for freelancers to get projects and for organizations to get skillful developers from all around the globe.
  • Introduced a feature for real-time messaging and video calls.
  • Launched a web app that got attention from large organizations within the country.
Technologies: Django, Video Calling, HTML, Python 3, Web App Development, Amazon Web Services (AWS), DevOps, HTML5, Relational Databases, Software Architecture, Linux, Tailwind CSS, Google Cloud Platform (GCP), Minimum Viable Product (MVP), Cloud Infrastructure, Java

Django Developer

2018 - 2019
Taha Solution
  • Developed a Python Django web app to help people earn by making networks by each person referring another person so that the whole tree network benefits from each newly registered user.
  • Collaborated with other team members to manage the overall web app and introduce new ideas, which were later converted into features.
  • Handled deployment of the web app in the production environment.
Technologies: Django, HTML, Python 3, Web App Development, HTML5, Relational Databases, Software Architecture, Linux, Google Cloud Platform (GCP), Minimum Viable Product (MVP), Cloud Infrastructure

Experience

Web App for Hovertise

The Hovetise portal is a management portal for Boxeyi that manages the company's operations. It involves communicating with the IoT, moving screens, playing different images or videos depending on advertisement contracts, and managing drivers. It also provides detailed reports on customer numbers by analyzing the route and location advertisement data from IoT devices. I developed the Python Django web app from scratch, a management dashboard, a dashboard for drivers, a sales dashboard, a customer dashboard, and a real-time location of IoT devices. I also saved and compressed the location data, drew heatmaps and routes, sent email reports, etc. I used Python Django for the back end, Bootstrap, JavaScript, and CSS for the front end, PostgreSQL for a database, the Python machine learning algorithm for data compression, Gunicorn, Nginx, and Daphne for the production environment setup, and Django Channels and WebSockets for real-time communication with IoT devices.

Web App for Thinkgroupy

This platform helps freelancers get projects, and organizations get skillful developers from all around the globe. Clients can communicate with developers using real-time messaging rooms or have voice and video calls. They can also use the web app to pay developers. The app has a lot of different features. I implemented the real-time chat rooms using Django Channels, contributed to developing the platform, and deployed the real-time Django web app using Daphne, Gunicorn, Nginx, PostgreSQL, Redis, etc.

Web App PyNetworking

This Python Django web app helps people earn by making networks. Any user can build a team for themselves by referring others, and their team decides on the standard for their earnings. The entire tree network gets benefits from each newly registered user. After the membership expires, this process repeats, and users can earn a large amount of money. Also, the platform's money is converted to cryptocurrency, so each user could also benefit from using blockchain technology. I used Python Django for the back end, JavaScript for graphs, Bootstrap for the front end, CSS for making tweaks in the front end, and Nginx, Gunicorn, and PostgreSQL for the production setup.

Smart Tourism Web App

A Python Django-based web app that provides smart solutions for people to visit tourist destinations. Users can explore tourist places, get to know about experiences of people visited in the past, book a trip, book a car, hire a tour guide, all solutions under one platform of the Smart Tourism web app.

Education

2018 - 2022

Bachelor's Degree in Computer Science

National University of Computer and Emerging Sciences - Lahore, Pakistan

Skills

Libraries/APIs

React, REST APIs, Node.js

Tools

NGINX, GitLab, PyCharm, Git

Languages

Python, JavaScript, CSS, HTML, HTML5, TypeScript, GraphQL, Java, Rust, Python 3, C++

Frameworks

Django, Next.js, Tailwind CSS, Bootstrap

Platforms

Google Cloud Platform (GCP), Amazon Web Services (AWS), Linux, Windows, Blockchain, Docker, Visual Studio Code (VS Code)

Paradigms

DevOps, REST

Storage

PostgreSQL, Relational Databases, Redis

Industry Expertise

Cybersecurity

Other

Full-stack, Data Extraction, Minimum Viable Product (MVP), Large Language Models (LLMs), AI Model Training, Debugging, WebSockets, Web App Development, APIs, Software Architecture, Artificial Intelligence (AI), Cloud Infrastructure, IT Project Management, Algorithms, Programming, Data Structures, Professionalism, Web Development, Internet of Things (IoT), Video Calling, Machine Learning, Data Science, Embedded Systems, LLM Evaluations, Data Annotation, Full-stack Development, Full-Stack Web App Evaluation, Code Review, Quality Assurance (QA), Behavioral Data Evaluation

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