Haider Ali
Verified Expert in Engineering
Software Developer
Lahore, Punjab, Pakistan
Toptal member since October 6, 2022
Haider Ali is the developer teams call when ideas need to move fast without breaking. He focuses on reducing risk, cutting wasted effort, and helping clients reach clarity faster. He turns uncertain concepts into dependable products, whether it’s an AI assistant, a marketplace, or a real-time mobile app.
Portfolio
Experience
- Node.js - 8 years
- React - 8 years
- TypeScript - 8 years
- Web Development - 7 years
- Next.js - 7 years
- React Native - 7 years
- Mobile Development - 7 years
- OpenAI - 4 years
Preferred Environment
Google Cloud, REST, React, SaaS, React Native, Large Language Models (LLMs), Google Maps, Dashboards, MERN Stack, Claude Code
The most amazing...
...thing that I've built is a crypto wallet mobile application that people use to receive or transfer crypto and validate in the network to earn.
Work Experience
Full-stack Developer
Academy for Therapist Evolution, PLLC
- Built a full-stack web application using React and Node.js, enabling therapists to practice simulated therapy sessions through AI-driven conversations.
- Integrated large language models via API (OpenAI/LLM) to create realistic client role-playing scenarios for EFT therapy training.
- Deployed and maintained a scalable cloud architecture supporting growing user adoption and reliable performance.
- Designed progress dashboards and analytics to track user performance, generate training reports, and recommend improvement areas.
- Implemented secure authentication, user profiles, and subscription-based access control for therapists accessing the training platform.
- Integrated the application with Kajabi for learning content delivery and payment workflows.
- Built a responsive and accessible UI using Tailwind CSS, ensuring smooth usability for therapists across devices.
- Deployed and maintained a scalable cloud architecture supporting growing user adoption and reliable performance.
Full-stack Developer
Elevated Influence LLC
- Designed a platform to connect influencers with brands.
- Built a design that allows brands to log in, view influencer data, and manage content.
- Created solutions for seamless interaction and campaign management.
Chief Technology Officer
TheHexaTown LLC
- Created and led the SaaS application for pre-screening candidates without any bias. I created and led its MVP, chose the MERN stack, and guided the development team. I was the go-to person for any technical issues.
- Developed a CRM for one of the UK's top magazine companies to manage all their clients' subscription information and update them using the amazing dashboard.
- Built an NFC mobile application where users can tap on any NFC device and read and write data onto it.
Full-stack Developer (via Toptal)
Alejandro Diaz
- Improved app performance by 30% by refactoring core React Native components, reducing load times, and enhancing UI responsiveness across iOS and Android.
- Cut crash rates by 40% through targeted debugging, Firebase error analysis, and stabilization of high-traffic features.
- Increased user engagement by launching new social media features and API-driven functionalities that improved overall user experience and platform retention.
- Accelerated feature delivery by 25% by streamlining the development workflow and collaborating closely with the client on sprint planning.
Senior Next.js Developer
ReUp
- Researched and guided clients about the technology Next.js for the website, and chose the Next.js 13 stable version over the beta version.
- Developed the complete front-end with Next.js, TypeScript, and Tailwind CSS for the website.
- Worked in Agile methodology for the complete development process.
- Provided weekly demonstrations for clients to provide progress updates.
- Conducted regular pull request reviews for other developers on GitHub.
- Tracked all the issues in Jira, which were then solved according to client requirements.
- Optimized the website's performance, resulting in faster page loads and improved user engagement, along with server-side rendering, which improves SEO.
- Configured Vercel with GitHub for continuous deployment and created various environments.
Full-stack Developer
Zero Cheating
- Built a Chrome extension that replays the entire assessment process, showing how a student typed, edited, and interacted with the document. This feature allows educators to visually verify if the student completed the work independently.
- Worked on an AI model that analyzed student activity on Google Docs to identify potential misconduct and text input patterns, identifying whether the content was copied, pasted, or written naturally.
- Developed a dashboard that provides detailed reports on detected anomalies, including suspected collaboration, unusual edit patterns, and time-based inconsistencies.
- Implemented multi-user tracking to check whether multiple accounts accessed the document during the assessment.
- Delivered a fully functional minimum viable product (MVP) within 1-2 weeks. This is the URL: https://chromewebstore.google.com/detail/zerocheating/dlakhomnnnfbppalnpepmjcdigfpgpjm?hl=en.
React and React Native Developer
LogicFab
- Developed a mobile application for an eCommerce platform where people can buy, sell, and trade stuff with the platform's own digital currency.
- Built a mobile application for a healthcare company that showed exercises based on the data collected from the user's fitness watches.
- Worked on a web chatting application that also included push notifications.
Web Developer
DigitalArtStudios
- Created website and landing pages for different international brands.
- Developed a website for a printing service-providing company to digitalize their presence and showcase their work online.
- Created an eCommerce platform for merchanding companies with the ability to customize their products.
Experience
Ma Coiffeuse Afro Mobile and Web App
https://macoiffeuseafro.com/ACCOMPLISHMENTS
• Used Google Maps API to enable users to find nearby stylists based on location and book through Calendar API.
• Integrated Stripe API for secure and straightforward payment processing, ensuring a smooth transaction experience. The API was also used to handle payment disputes, refunds, and recurring payments, providing a reliable financial backbone to the app.
• Implemented Firebase Cloud Messaging to handle real-time notifications, informing users about appointment confirmations, reminders, and other essential updates.
• Used Firebase Authentication to securely manage user logins, providing a seamless and secure sign-in experience.
• Developed a system for managing user profiles, allowing users to upload photos, leave reviews, and track their booking history.
Human Resource SaaS for HexaHiring
Fictional Chat Mobile Application and Dashboard
React CRM Dashboard for Magazine Company
Prime Labs
ReUp
https://www.reup.live/As a front-end developer on this project, my primary role involved crafting an immersive user interface emphasizing interactivity and responsiveness. I implemented dynamic animations, intuitive UI components, and engaging data visualizations to ensure a seamless user experience.
TECHNOLOGIES USED
• React for robust and responsive UI component management
• Next.js to optimize server-side rendering and performance
• Framer Motion for fluid, engaging animations that enhance user interactions
• D3.js for interactive and dynamic data-driven visualizations, enhancing product exploration and analytics
• GSAP for high-performance animations, enhancing visual appeal and interaction
• Tailwind CSS for efficient, utility-first styling and responsive design
Buraq | AI Chatbot Lead Generation Platform
I managed the entire end-to-end development lifecycle using:
• Next.js to create SEO-friendly front-end components with SSR for improved load speeds and user experience.
• Express.js to build back-end APIs, efficiently handle user requests and form submissions, and secure data storage.
• MongoDB for flexible database management, capturing and organizing lead data effectively.
• Tailwind CSS to implement responsive, utility-first design principles, enhancing usability across all devices.
• Nodemailer integration for automated email communication, ensuring instant follow-up and improved customer interaction.
• RESTful APIs to integrate with third-party tools and enhance back-end capabilities.
• JWT for secure authentication and authorization.
• HTTPS and SSL for encrypted and secure data transfer between the client and server.
• Comprehensive form validation for enhanced user input accuracy.
Real Estate Customer Support and Chat Platform
https://play.google.com/store/apps/details?id=com.alkhalil.appAs a full-stack developer, I was responsible for developing and deploying the mobile app, web app, and admin dashboard, ensuring seamless communication and secure interactions. I used:
• React and React Native for cross-platform experience, ensuring smooth performance.
• The admin dashboard was developed using React and Node.js to manage users, modify access, and oversee group settings.
• Socket.io for real-time messaging. I implemented instant chat capabilities, enabling users to communicate without delays.
• Redux for state management that ensured smooth data flow between components, making the chat system fast.
• Firebase for secure login mechanisms and cloud functions for real-time updates.
• Enabled seamless sharing of rich media like images, videos, and voice messages to enhance conversations.
• Push notifications were enabled with Firebase Cloud Messaging (FCM) to receive instant alerts.
• Implemented end-to-end encryption to protect confidential business and client information.
• Developed a user-friendly UI with Tailwind CSS and React Native.
Able
Key technical features:
• Real-time sync: Powered by WebSockets in Node.js, enabling instant updates on health metrics and social interactions without delays.
• Health data integration: Custom Native Module connects with the device health APIs, directly tracking metrics like steps and heart rate within the app.
• Social sharing and media handling: Utilizing AWS S3 and CloudFront CDN for efficient media storage and delivery, providing a fast and seamless experience for sharing photos and updates.
• Customizable notifications: Firebase Cloud Messaging (FCM) delivers tailored reminders to keep users engaged and on track with their health goals.
• Data security: Firebase authentication and real-time data protection rules ensure secure sessions and data privacy.
Recall
https://www.getrecall.ai/I developed the entire front end using React, focusing on performance, usability, and scalability. I also implemented modular components to allow easy navigation, inline editing, and seamless organization of knowledge entries. I handled real-time state management using React Context API, ensuring updates to documents and folders are reflected live without requiring a page reload.
KEY FEATURES
• Built with reusable components for editing, tagging, and organizing documents intuitively.
• Changes to entries are synced instantly via Context API, enabling smooth collaboration and eliminating refresh loops.
• Optimized across screens
• Users can group and structure documents with flexible folders and tagging logic tailored to their needs.
• Fast retrieval of documents using optimized search with minimal render lag.
• Supports secure access with JWT/OAuth, ensuring only authorized users can view and modify sensitive documentation.
MyLGP
https://play.google.com/store/apps/details?id=eu.mylpg.android&hl=en&gl=USKEY FEATURES
• Real-time location tracking and dynamic station markers
• Interactive maps with station info, panning, and zoom gestures
• Smooth UI built with custom React Native components
• Cross-platform performance across iOS and Android
• Secure location handling with HTTPS and permission controls
Barter Unit (Web and Mobile)
ACCOMPLISHMENTS
• Developed a real-time bartering system utilizing socket-based communication, allowing users to engage in instant and secure transactions.
• Created custom UI components to ensure a seamless and consistent user experience across web, Android, and iOS platforms, enhancing usability and engagement.
• Integrated native device features such as the camera for item listings and geolocation for finding nearby barter opportunities, providing users with enhanced functionality.
• Implemented push notifications to deliver real-time updates on barter offers and transaction statuses, keeping users informed and engaged.
• Used GCP to enhance the app's performance and scalability, enabling it to efficiently handle a large user base.
• Managed the app's publishing to the Apple and Google Play stores and implemented payment gateway solutions.
Wovvo
https://www.wovvo.ai/I built the front-end architecture using Next.js and React with SSR and optimized data fetching for a high-performance SaaS dashboard. I developed dynamic UI components with TypeScript and Tailwind CSS to create a maintainable, responsive interface and integrated REST APIs and back-end services to enable real-time job aggregation and automated data updates.
6 Pack Macros | AI-powered Fitness Coaching Mobile Platform
https://play.google.com/store/apps/details?id=com.neil.macro6&hl=en&pli=1I developed real-time chat hubs and client management modules using Firebase, enabling trainers to manage clients, track progress, and communicate through integrated chat while users receive AI-generated fitness and nutrition plans.
I integrated cloud back-end services and REST APIs for secure user data management, progress tracking, and program updates, and helped build a scalable architecture that allows coaches to manage multiple clients, programs, and progress within a single platform.
Skills
Libraries/APIs
React, Node.js, REST APIs, Google Maps, Stripe API, Stripe, Twilio API, Google Calendar API, React Redux, Web3.js, WebRTC, OpenAI API, Bolt, PostgREST, Claude API, Stripe Connect API, Google Play API, API Development, HubSpot API, QuickBooks API, Google APIs, Chart.js, D3.js, AG Grid, Framer Motion, jQuery, Social Media APIs, Google Maps API, PayPal API, Amazon Rekognition, YouTube API, Facebook SDK, TikTok API
Tools
Git, GitHub, Auth0, Redux Toolkit, ChatGPT, Terraform, Windsurf, Claude, Claude Code, n8n, Zapier, Google Sheets, Microsoft Excel, TestFlight, Make (formerly Integromat), Capacitor, Jira, Claude Agent SDK, Firebase Authentication, Firebase Cloud Messaging (FCM), Prisma, Figma, Webpack, Front-end Build Tools, Stripe Checkout, Expo, Android Profiler, Sentry, Retell AI
Languages
JavaScript, HTML5, CSS, HTML, TypeScript, SQL, GraphQL, Python, CSS3
Frameworks
React Native, Next.js, Redux, Tailwind CSS, Material UI, Express.js, Payload CMS, Django, LangGraph, OAuth 2, Agentic Frameworks, NestJS, Bootstrap, Ionic, Fastify
Paradigms
Agile Software Development, Mobile Development, DevOps, Responsive Web Design (RWD), UI Design, UX Design, Responsive, Microservices, Web Performance Optimization (WPO), Low-code Development, Back-end Architecture, Database Design, Automation, Agile Project Management, Marketplace Platforms, Agile, Model Context Protocol (MCP), Serverless Architecture, Clean Code, Fast Healthcare Interoperability Resources (FHIR), Unit Testing, Scrum, Test-driven Development (TDD), Cross-platform, RESTful Development, Design Patterns, REST, Microservices Architecture, Microfrontends, Role-based Access Control (RBAC), Hosting
Platforms
Firebase, Android, iOS, Amazon Web Services (AWS), Mapbox, Google Cloud Platform (GCP), Mobile, Web, Twilio, OpenCart, Vercel, Replit, Zoho CRM, Azure Functions, GoHighLevel, HubSpot, Vapi, WordPress, Ollama, Kubernetes, Heroku, Docker, Apache Kafka, Telnyx, Clerk
Storage
MySQL, PostgreSQL, Web Forms, Databases, MongoDB, Redis, Google Cloud, Database Architecture, JSON, Database Management, Data Pipelines, Cloud Deployment, Cloud Firestore, NoSQL, Datadog, Azure Cloud Services, Amazon S3 (AWS S3)
Industry Expertise
Social Media, Healthcare, Project Management, Automotive
Other
MERN Stack, Web Development, CSS5, APIs, Front-end, Full-stack, Pixel Perfect, Web App Development, Dashboards, SaaS, Data Visualization, API Integration, Responsive UI, Full-stack Development, Minimum Viable Product (MVP), Team Leadership, Architecture, Technical Leadership, Software Architecture, Back-end, Mobile Apps, Front-end Development, Mobile App Development, Artificial Intelligence (AI), Solution Architecture, Web & Mobile Applications, Cross-platform App Development, Video Streaming, Front-end Design, Dating Apps, eCommerce, Software Engineering, Back-end Development, Supabase, Cryptocurrency Wallets, Crypto, Progressive Web Applications (PWAs), Front-end Architecture, Authentication, Large Language Models (LLMs), App Store, Google Play Store, JSON REST APIs, UI Development, Web UI, Responsive Web Apps, Performance, Scalability, Scheduling, Calendars, Google Calendar, OpenAI, Chatbots, Cryptocurrency, CI/CD Pipelines, Application Performance Monitoring, Open-source LLMs, AI Agents, Cursor AI, Large-scale Projects, User Workflows, Mobile Applications, AI Chatbots, Data Analytics, Page Speed Optimization, Cloudflare, Website Performance, Site Speed Optimization, Load Time, Images, Prompt Engineering, Tailwind UI, Analytical Dashboards, Multi-tenant SaaS, AI Integration, AI Voice Agents, Cloud Infrastructure, Infrastructure, Workflow Automation, Automations, Agentic AI, AI Automation, AI Tools, Retrieval-augmented Generation (RAG), LangChain, SMS, CRM, Webhooks, Internet of Things (IoT), CTO, Product Development, Product Management, CSV, Agentic RAG Systems, Agentic AI Systems, Documentation, AI Agent Orchestration, AI Engineering, Email Automation, Event-driven Systems, OAuth, Workflow Automation & System Integration, PDF, AI Development, Anthropic, Performance Optimization, Authorization, Azure Function App, Multi-agent Systems, Startups, FastAPI, Gemini, AI-generated Code, System Architecture, AWS Cloud Architecture, SaaS Architecture, Fractional CTO, Code Review, Code Auditing, Debugging, Consulting, System Integration, Payments, Cloud, Customer Relationship Management (CRM), ElevenLabs Solutions, Zoho, Base44, LLM Integration, ChatGPT API, Web Scraping, Technical Architecture, Web Crawlers, AI-assisted Development, Maintenance, System Design, Operations, Technical Consulting, Audits, Web Applications, Data Scraping, LinkedIn Sales Navigator, Business Process Automation, Key Performance Indicators (KPIs), Scraping, Algorithms, Multi-agent Orchestration, Workflow, Lovable, Cloud Storage, Vibe Coding, Multitenancy, Supabase Auth, Resend, Advisory, IT Consulting, Agentic Workflow Design, IT Strategy, Enterprise Resource Planning (ERP), Strategy, Fitness, Training, LLM Agents, Integrations, Reviews, Figma to React, Marketplaces, Education Technology (Edtech), Platforms, RAG Systems, Email, Data Science, Reports, AI Product Management, Product Planning, Software as a Service (SaaS), COO, Delivery Management, Standard Operating Procedures Development, Attendance Systems, Digital Design, IT Security, Onboarding, Monday.com, Gmail, Google Drive, Generative Artificial Intelligence (GenAI), Early-stage Startups, Payment Gateways, MVP Design, Billing, Prototyping, Machine Learning Operations (MLOps), Observability, Production Engineering, Agentic Coding, OpenAI SDK, Data Integrity, Auditing, CMS, Product Owner, Streaming, Videos, HIPAA, RESTFul APIs, Application Security, App Store Acceptance Process, Firebase Cloud Functions, Gatsby, Data Analysis, Styled-components, Leadership, Communication, English, Integration, Business Analysis, Design, API Connectors, Deployment, PDF Forms, User Interface (UI), User Experience (UX), UI Components, Mobile UX, Hybrid Apps, Third-party Integration, Payment APIs, Mobile First, Profiling, Monitoring, PHP Performance, Machine Learning, Error Handling, Feature Analysis, Real Estate, Apollo, Product Discovery, Design Systems, Cloud Architecture, Workflows, Computer Vision, Live Chat, Video Calling, Healthtech, Push Notifications, Fintech, Payment Processing, Security, Automotive Systems, Booking, Reservation Flow, Hotels & Lodging, Real-time Data, Booking Apps, Appointment Booking, Data Extraction, Mentorship, Risk Assessment, Cloud Migration, Inventory Management, Robotic Process Automation (RPA), Business Development, Affiliate Marketing, Affiliate Tracking, Travel, Transcoding, Optical Character Recognition (OCR), Chrome Extensions, CRM APIs, OpenAI GPT-4 API, Animation, Collaborative Filtering, Apify SDK, PayPal, Finance
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