Haziz Feroz Khan, Developer in Karachi, Sindh, Pakistan
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Haziz Feroz Khan

TypeScript Developer

Karachi, Sindh, Pakistan

Toptal member since December 8, 2025

Bio

Haziz is a full-stack JavaScript/TypeScript developer specialising in React, Angular, Node.js, and cloud-native backends. He turns complex business requirements into reliable features, from dynamic form builders and static site generators to real-time streaming and AI-powered apps. He cares deeply about code quality, maintainability, and mentoring teams to ship fast without breaking things.

Portfolio

Avrox Solutions
Redux, Amazon Web Services (AWS), Express.js, JavaScript, MongoDB, React Native...
Jitera
React, JavaScript, Amazon Web Services (AWS), Express.js, MongoDB, Node.js...
Bright Development
React, Angular, JavaScript, TypeScript, Amazon Web Services (AWS), Express.js...

Experience

  • TypeScript - 8 years
  • React - 8 years
  • JavaScript - 8 years
  • Redux - 6 years
  • Angular - 5 years
  • MongoDB - 3 years
  • Node.js - 3 years
  • Express.js - 3 years

Preferred Environment

React, JavaScript, TypeScript, Slack, Node.js, Express.js, Next.js, Cursor AI, CSS, HTML

The most amazing...

...thing I’ve developed is Run, a website builder that helps political campaigns launch fast, high-converting sites.

Work Experience

Full-stack Developer

2023 - 2025
Avrox Solutions
  • Built a property valuation app as the sole developer, integrating Bridge API to find comparable properties and using GPT-based AI to generate price estimates, explanations, and confidence scores.
  • Implemented a serverless workflow with AWS Step Functions and EventBridge Scheduler to download SFTP files, decrypt, process, and persist cleaned data into the database.
  • Developed a metadata-driven form component to accelerate feature delivery and reduce repetitive, hard-to-maintain front-end code.
Technologies: Redux, Amazon Web Services (AWS), Express.js, JavaScript, MongoDB, React Native, TypeScript, React, Node.js, Next.js, Front-end, Back-end, JSON Web Tokens (JWT), Amazon S3 (AWS S3), AWS Step Functions, SFTP, AWS Transfer for SFTP, GraphQL, React Query, Firebase, API Integration, AI Integration, Auth0, Google Maps SDK, Mapbox SDK, Leaflet, OpenLayers, Payment Processing, Full-stack Development, Stripe Connect, Supabase, Vercel, CSS, HTML, Google Maps API

Full-stack Developer

2022 - 2023
Jitera
  • Led the end-to-end development of a social media streaming app from scratch, integrating live streaming, video and voice calling, messaging, and a points-based virtual gifting system.
  • Implemented GPT API–powered compatibility matching and real-time chat features, delivering a more dynamic and personalized user experience.
  • Contributed to an in-house ORM for PostgreSQL, improving database access patterns and developer productivity.
Technologies: React, JavaScript, Amazon Web Services (AWS), Express.js, MongoDB, Node.js, React Native, Redux, TypeScript, Next.js, AI Integration, Amazon S3 (AWS S3), Angular, API Integration, Auth0, AWS Step Functions, AWS Transfer for SFTP, Back-end, Firebase, Front-end, Gatsby, Git, Google Maps, Google Maps SDK, GraphQL, JSON Web Tokens (JWT), Leaflet, Mapbox SDK, OpenLayers, Programming, React Query, SFTP, Slack, Payment Processing, Full-stack Development, Stripe Connect, Supabase, Vercel, CSS, HTML, Google Maps API

Lead Software Developer

2021 - 2022
Bright Development
  • Built a static website generator using a React front end to capture site metadata, stored it in the database, and scripted Gatsby builds from JSON metadata into production-ready static sites.
  • Implemented Shadow DOM encapsulation to isolate styles for the website builder UI and live preview, preventing CSS leakage and ensuring consistent theming.
  • Contributed to a mobile application with integrated livestreaming and in-app purchases, enhancing user engagement and monetization.
Technologies: React, Angular, JavaScript, TypeScript, Amazon Web Services (AWS), Express.js, MongoDB, Node.js, Programming, Redux, React Native, Payment Processing, Full-stack Development, Stripe Connect, Next.js, Vercel, CSS, HTML, Google Maps API

Lead Software Developer

2020 - 2021
AlgoRack
  • Led development of a NativeScript mobile app by code-splitting and reusing the existing web codebase, delivering a new platform without impacting the existing web application.
  • Recreated OpenLayers-based web map features on mobile by integrating native map SDKs, achieving comparable functionality and performance tailored to mobile devices.
  • Managed and mentored a team of 4 developers, including task planning and distribution, code reviews, and ongoing coaching to improve code quality and delivery speed.
Technologies: JavaScript, React, Angular, TypeScript, Node.js, Express.js, MongoDB, Amazon Web Services (AWS), Redux, Payment Processing, Full-stack Development, Stripe Connect, Next.js, Vercel, CSS, HTML, Google Maps API

Software Developer

2017 - 2020
AlgoRack
  • Engineered highly dynamic Angular/ngx-formly forms handling 300+ interdependent fields, including optional “extra” fields and custom controls (autocomplete, range, wildcard), while keeping the front end optimized and responsive.
  • Developed an end-to-end timesheet feature with check-in/checkout tracking and automated payroll calculations for salary, overtime, and double overtime across Angular front end and Node.js/Express/MongoDB back-end services.
  • Became the youngest developer in the company to be promoted to lead software developer, taking ownership of key projects and mentoring teammates.
Technologies: JavaScript, TypeScript, React, Angular, Node.js, Express.js, Payment Processing, Full-stack Development, Stripe Connect, Next.js, Vercel, CSS, HTML, Google Maps API

Experience

ReboGateway

http://pro.rebogateway.com
ReboGateway is a real estate prospecting platform that helps agents identify likely home sellers using rich property and “life events” data, farming tools, maps, and analytics. As a front-end developer, I worked on the Angular web application and the NativeScript mobile app, focusing on building a fast, intuitive UI for searching and filtering properties, viewing maps and tract insights, and managing lead lists. I implemented dynamic, metadata-driven forms using ngx-formly so the team could configure complex search and marketing workflows without rewriting UI code. I also helped optimize performance and responsiveness across desktop and mobile, ensuring agents could quickly access high-value opportunities in the field.

DesignedToRun!

https://www.designedtorun.com/
Run is a website builder tailored for Democratic political campaigns and advocacy organizations, designed to make it fast and easy to launch professional, high-converting campaign sites. I contributed to the core application that powers the marketing site and the template-driven builder used by campaigns of all sizes. My work focused on building responsive, mobile-first layouts, implementing reusable components for pages like issues, endorsements, donations, and volunteer sign-ups, and integrating with third-party tools for forms and email/CRM. I also helped optimize performance for high-traffic moments (such as launch days and fundraising pushes), improved the editor experience so non-technical staff could safely update content without breaking layouts, and collaborated closely with designers and campaign strategists to ensure the product met real campaign needs from onboarding through launch.

Homebody Live Fitness

Homebody is a live-streaming fitness marketplace that connects users with trainers, influencers, and celebrities for real-time workout sessions. As a front-end engineer, I worked on both the React web application and the React Native mobile app, building out core user flows such as onboarding, class discovery, scheduling, and joining live sessions. I implemented reusable UI components, integrated the GraphQL API for real-time updates to schedules and creator profiles, and optimized rendering performance to handle video-centric pages smoothly on mobile devices. I also collaborated closely with designers and back-end engineers to ensure a consistent experience across platforms and to support new monetization features for creators.

Education

2016 - 2019

Diploma of Associate Engineering in Computer Science

Jinnah Polytechnic Institute - Karachi, Pakistan

Skills

Libraries/APIs

React, Google Maps, Stripe Connect, Google Maps API, Node.js, OpenLayers, Stripe, React Query, Google Maps SDK, Leaflet

Tools

Git, Slack, AWS Step Functions, Auth0

Languages

JavaScript, TypeScript, CSS, HTML, GraphQL

Frameworks

Angular, Next.js, JSON Web Tokens (JWT), Express.js, Redux, React Native, Flutter

Platforms

Vercel, Amazon Web Services (AWS), FlutterFlow, Firebase, Android, iOS

Paradigms

Mobile Development

Storage

MongoDB, Amazon S3 (AWS S3)

Other

Payment Processing, Web Development, Cursor AI, Programming, Gatsby, Full-stack Development, APIs, Supabase, Webhooks, Troubleshooting, Deployment, Front-end, Back-end, SFTP, AWS Transfer for SFTP, API Integration, AI Integration, Mapbox SDK

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