
Haziz Feroz Khan
Verified Expert in Engineering
TypeScript Developer
Karachi, Sindh, Pakistan
Toptal member since December 8, 2025
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
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
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.
Full-stack Developer
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.
Lead Software Developer
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.
Lead Software Developer
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.
Software Developer
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.
Experience
ReboGateway
http://pro.rebogateway.comDesignedToRun!
https://www.designedtorun.com/Homebody Live Fitness
Education
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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