Zohan Khan, Developer in New York, NY, United States
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Zohan Khan

React Developer

New York, NY, United States

Toptal member since March 16, 2020

Expertise
Full-stackFront EndBack-end DevelopersReact.jsJavaScriptAWSAngularCSSHTML5Tailwind CSSREST APIAgile DevelopmentJiraGitHub
Bio

Zohan is a skilled front-end developer with a demonstrated history of working in the finance and insurance industries. He is proficient with modern JavaScript frameworks and libraries. Zohan has extensive professional expertise in the MERN and MEAN stacks.

Portfolio

Bellscan LLC
React, TypeScript, JavaScript, HTML, CSS, Supabase, PostgreSQL, Figma Make...
Twenty Labs, LLC dba Healthy Together - Engineering
React, TypeScript, HIPAA Compliance, Supabase, Tailwind CSS
ShiftHarmony AI Inc.
Node.js, TypeScript, React, Express.js, Replit, PostgreSQL, OpenAI API...

Experience

  • React - 8 years
  • HTML - 7 years
  • CSS - 7 years
  • JavaScript - 7 years
  • Tailwind CSS - 7 years
  • Angular - 7 years
  • TypeScript - 5 years
  • SCSS - 3 years

Preferred Environment

TypeScript, JavaScript, HTML5, CSS, Angular, React, Tailwind CSS, Remix, Next.js, Node.js

The most amazing...

...thing I've done is build Mylifeforce.com with Tony Robbins.

Work Experience

React Full-stack Engineer

2026 - 2026
Bellscan LLC
  • Built a production React 18 + TypeScript single-page app with Vite and Tailwind CSS, shipping [X+] user-facing routes spanning profile, newsfeed, leaderboard, notifications, host/play flows, tasks, and settings.
  • Implemented end-to-end Supabase authentication (email/username login, multi-step signup, guest access, password reset, session handling in React Context) and wired it to a PostgreSQL schema with versioned SQL migrations and row-level security policies.
  • Designed and shipped a gamified retail experience with [5] distinct game modes (e.g., Guess the Total, Price Ladder, Aisle Match, Digit Drop, Price Swap), integrated into onboarding (“How to play”) and core host/player journeys.
  • Established a documented developer workflow (environment configuration, Supabase CLI, build/preview scripts) so the stack could be reproduced and deployed consistently across environments.
  • Deployed the application to AWS Amplify, configured environment-based URLs for auth emails (VITE_SITE_URL), and documented custom SMTP (e.g., Resend) options for production-scale transactional email beyond Supabase’s default limits.
  • Delivered shareable entry points (e.g., /j/:token share links) and an admin path, extending reach and operational control without duplicating the core product surface.
  • Owned product-adjacent compliance and trust surfaces by shipping Terms and Privacy pages and integrating them into signup and settings where users expect legal clarity.
Technologies: React, TypeScript, JavaScript, HTML, CSS, Supabase, PostgreSQL, Figma Make, Figma

Front-end Engineer

2025 - 2026
Twenty Labs, LLC dba Healthy Together - Engineering
  • Architected a Turborepo monorepo (pnpm) for Medicaid CEV: React 18 + Vite UI, Apollo Federation gateway, and six TypeScript GraphQL domain services (auth, workspaces, participants, activities, verifications, notifications).
  • Implemented multi-tenant isolation with workspace-scoped data, JWT access/refresh, RBAC, and Prisma on PostgreSQL with tenancy enforced in API and database layers.
  • Shipped an admin UI with a live-metrics dashboard, searchable/filterable participant lists, CRUD, starred participants, and verification status (e.g., verified, pending review, needs clarification).
  • Exposed a unified GraphQL API via Apollo Federation v2 and a single gateway; used Redis for sessions/caching and documented BullMQ for background jobs and notifications.
  • Applied security patterns: AES-256 PII at rest, audit logging, CORS allowlists, and rate limiting—aligned with HIPAA-style operational expectations for Medicaid agencies.
  • Integrated SES email, Twilio SMS, and S3-oriented document storage to support activity evidence and case-worker verification workflows.
  • Introduced a shared domain-events package with pub/sub (in-memory, Redis Streams upgrade path) to support future orchestration and third-party integrations.
Technologies: React, TypeScript, HIPAA Compliance, Supabase, Tailwind CSS

Full-stack Developer

2025 - 2025
ShiftHarmony AI Inc.
  • Designed and implemented ShiftHarmony, a hybrid AI medical staff scheduling system combining ChatGPT with Google OR-Tools CP-SAT to deliver 100% rule-compliant schedules for hospitals and clinics.
  • Developed a Python FastAPI back end with a natural language rule parser, converting provider rules (e.g., “no more than three night shifts per week”) into mathematical constraints in real time.
  • Implemented hybrid scheduling strategies (CP-SAT first, ChatGPT first, parallel, iterative), improving performance from 30s to 5s for medium datasets (20–30 providers, one month).
  • Built a Next.js and TypeScript front end with role-based access control (RBAC), supporting Super Admin, Admin, and User roles across multi-tenant institutions.
Technologies: Node.js, TypeScript, React, Express.js, Replit, PostgreSQL, OpenAI API, Google OR-Tools, Next.js, Prisma, API Integration, Front-end Development

Next.js Developer

2025 - 2025
Spheros, Inc
  • Built and enhanced Next.js applications for data privacy and sharing platforms, focusing on scalability, security, and multi-user management.
  • Leveraged PostgreSQL and React to deliver efficient data management and a responsive user experience.
  • Applied best practices in UI development using libraries such as Next UI, while considering data privacy laws and compliance requirements.
  • Improved logging and auditing systems to strengthen compliance and traceability across business-to-business data transactions.
Technologies: React, JavaScript, Next.js, PostgreSQL, Vercel, Amazon S3 (AWS S3), Tailwind CSS, TypeScript, API Integration, Front-end Development

Full-stack Next.js Developer

2024 - 2025
Evergray Innovations, LLC
  • Developed and revamped over 10 front-end pages using React, Next.js, and PrimeReact, integrating multiple third-party APIs, including Wiza API, based on provided mock-ups.
  • Designed several PostgreSQL tables for user and security management and developed 10 new APIs for user and contact management services.
  • Resolved over 15 production bugs reported by active users, enhancing overall application stability and improving user satisfaction by 20% based on feedback.
Technologies: TypeScript, React, Full-stack Development, Next.js, MongoDB, REST APIs, Data Cleansing, Heroku, Amazon Web Services (AWS), PostgreSQL, API Integration, Front-end Development

Full-stack and AI Developer

2024 - 2025
AlphaSeeker AI, Inc
  • Implemented multiple AI models, including LIMA, to predict stock price changes and futures trends based on historical stock market data, achieving an accuracy improvement of up to 15% compared to baseline models.
  • Developed interactive charts and data tables using D3.js and Recharts to present AI results, improving client decision-making for 20+ stakeholders.
  • Implemented Next.js middleware to enable secure and private routing, safeguarding API calls and enhancing application security for over 15 endpoints.
  • Integrated big data solutions (Apache Kafka, Spark, Hadoop) to process and analyze petabyte-scale datasets efficiently on Node.js back end.
Technologies: React, Linux, Material UI, Tailwind UI, Artificial Intelligence (AI), D3.js, Next.js, Node.js, API Integration, Front-end Development

Senior Front-end Developer

2024 - 2024
The Rumor Group Corporation Inc.
  • Developed the Rumor UI library. Created a custom UI library using Tailwind CSS, built on top of the MUI base components.
  • Implemented Redux thunks. Defined thunk functions to interact with API endpoints and efficiently update the Redux store.
  • Created custom hooks. Developed several custom hooks to optimize the React component lifecycle management.
  • Established protected routes. Implemented access control for protected pages by defining restriction logic within Next.js middleware.
Technologies: React, Next.js, Vue, HTML5, CSS3, Sass, Less, JavaScript, CSS, HTML, Redux, Front-end Development

Senior Front-end Engineer

2023 - 2023
Webflow, Inc.
  • Developed a widget that extends integrations of applications in a 3rd-party developer ecosystem using React and the internal design system, which resulted in various 3rd-party integrations from big players like Zapier, Shopify, and Google.
  • Wrote and updated unit tests to bug-proof the existing and newly written code using Jest.
  • Revamped the coupon creation process for company admins using AngularJS.
Technologies: React, JavaScript, Node.js, Amazon Web Services (AWS), GraphQL, Jest, Cypress, Angular, QA Testing, Webflow, GitHub, Stripe, HTML, CSS, MySQL

Front-end React Developer

2022 - 2022
Beneficent Technology Inc dba Benetech
  • Built a file editor web application from scratch with React and Tailwind CSS.
  • Implemented AWS services such as Amplify and Cognito.
  • Oversaw the delivery of the pilot application, successfully launching for testers and internal users.
Technologies: React, Agile, JavaScript, Amazon Web Services (AWS), GraphQL, React Hooks, TypeScript, Tailwind CSS, Jira, Front-end, React Router, Figma, JavaScript Testing, MySQL

Full-stack Engineer

2022 - 2022
TipLink Corp
  • Rebuilt the user interface in React, Tailwind, and Next.js based on new wireframes provided by the designer for the cryptocurrency project.
  • Interacted with and implemented the Solana blockchain to execute payment transactions.
  • Oversaw launch process, successfully deploying the application for token use by major events and festivals.
  • Integrated authentication and authorization mechanisms, enhancing application security and user data protection on Node.js/Express back end.
Technologies: React, CSS, Node.js, HTML, Full-stack, Cryptocurrency, Blockchain, UI Development, REST APIs, CI/CD Pipelines, Next.js, Agile, Jira, Front-end, React Router, Web 3.0, Figma, JavaScript Testing, MySQL, Express.js, Front-end Development

React Front-end Developer

2022 - 2022
Fortuna LLC
  • Developed a greenfield application using Remix and Tailwind.
  • Converted sketch wireframes to an application while contributing to them with the lead designer.
  • Onboarded and interviewed other team members and made key decisions for hiring more talent.
Technologies: React, CSS, JavaScript, Sass, Sketch, Figma, User Interface (UI), HTML, Node.js, UI Development, UI Design, UX Design, React Redux, CI/CD Pipelines, Next.js, Agile, Jira, Front-end, React Router, Builder.io, JavaScript Testing, MySQL, Front-end Development

Full-stack Web Developer

2021 - 2022
Vitazi.AI - Main
  • Updated the UI redesign successfully while rebranding the platform in React and JavaScript.
  • Updated Amazon EC2 servers to streamline the deployment process.
  • Managed and communicated between various teams (previous and current stakeholders) to execute the brand transfer smoothly.
  • Designed and implemented scalable, high-performance RESTful APIs and microservices using Node.js and Express.js.
Technologies: JavaScript, CSS, HTML, React, Databases, AngularJS, Testing, Amazon Web Services (AWS), UI Development, UI Design, UX Design, CI/CD Pipelines, Next.js, Agile, Jira, Front-end, React Router, Figma, JavaScript Testing, Node.js, Front-end Development

Senior React Engineer

2021 - 2021
Cotribute
  • Developed reusable functional components to onboard users on a financial app for loans and banking, using React, Antd, Hooks, and TypeScript. Integrated Plaid to get users' financial data.
  • Converted Figma designs to fully functioning pages as the face of the product. Implemented routing using Next.js.
  • Incorporated Segment to track user activity for analytics while coordinating with the team to determine key metrics.
  • Achieved a rapid stepper flow to onboard new members onto a platform that enables them to easily take out a loan of their desired amount. Standardized development by replacing custom components with UI elements.
Technologies: React, TypeScript, Antd, Next.js, HTML, SCSS, CSS, Git, REST, HTML5, Tailwind CSS, UI Development, UI Design, UX Design, Agile, Jira, Front-end, React Router, D3.js, Figma, JavaScript Testing, Front-end Development

Senior React Engineer

2021 - 2021
In Class Today
  • Led the development and architecture of a React application from scratch.
  • Utilized hooks and shareable functional components to display mass data.
  • Applied the Tailwind framework to expedite the development of the user interface.
Technologies: JavaScript, React, Tailwind CSS, Cypress, Storybook, GraphQL, SCSS, HTML, CSS, Git, Amazon Web Services (AWS), Jest, HTML5, UI Development, UX Design, Agile, Jira, Front-end, React Router, Apollo, Figma, JavaScript Testing, Front-end Development

Front-end Engineer

2020 - 2021
Scorpion
  • Built shareable components in Angular for the use of applications within the ecosystem.
  • Wrote unit and end-to-end tests for components using Jest and Cypress.
  • Added Storybook for isolated mocks and examples of shareable components.
Technologies: Angular, CSS, Sass, HTML, Cypress, Jest, SCSS, TypeScript, Git, REST, Storybook, HTML5, UI Development, REST APIs, Agile, Jira, Front-end, D3.js, Figma, JavaScript Testing, Front-end Development

Software Engineer

2020 - 2020
FastFin
  • Built the primary client web application using Angular 10.
  • Developed, architected, and managed REST APIs in C# .NET.
  • Increased testing coverage by 70% using Cypress and Jasmine.
Technologies: Amazon Web Services (AWS), Git, REST, Jasmine, CSS, Cypress, HTML5, Sass, Angular, TypeScript, JavaScript, SCSS, HTML, Material UI, Storybook, Jest, UI Development, UI Design, REST APIs, CI/CD Pipelines, Agile, Jira, Front-end, Figma, JavaScript Testing, Front-end Development

Front-end Web Developer

2018 - 2020
Consumer Priority Service
  • Led the development and adoption of Angular for the primary client web application for over one million users.
  • Developed an additional eCommerce sales web application using Angular for over 200,000 customers.
  • Administered and deployed all cloud solutions using AWS.
Technologies: Amazon Web Services (AWS), TypeScript, Git, Microsoft SQL Server, CSS, HTML, JavaScript, Angular, SCSS, REST, Bootstrap, HTML5, UI Development, REST APIs, CI/CD Pipelines, Agile, Jira, Front-end, Figma, JavaScript Testing, Front-end Development

Front-end Web Developer

2018 - 2018
Colotek
  • Developed a client-facing web application with React and Redux.
  • Built over 24 shared components for usage across the app.
  • Actively engaged with the design team to build a fluid user experience.
Technologies: Redux, Material UI, React, HTML, CSS, JavaScript, Git, HTML5, UI Development, REST APIs, CI/CD Pipelines, Agile, Jira, Front-end, JavaScript Testing, Front-end Development

Experience

Insurance Company Client Portal

http://client.cpscentral.com
A client portal built in Angular to allow the customers of an insurance company to carry out vital tasks such as managing warranties, filing claims, updating product information, claims management, updating personal and billing information, etc.

Scorpion

An Angular enterprise application that hosts a suite of marketing tools for business clients. I was a front-end engineer on the shared team in charge of building foundational UI modules utilized by developers on other teams. For each component, I regularly wrote E2E tests in Cypress.io and unit tests in Jest. I also documented the usage of modules with Storybooks. That job was UI-focused, so advanced styling concepts such as mixins and variables in Sass and Angular animations were implemented extensively.

Cerebro Web Application at Everyday Labs

https://www.everydaylabs.com/
A React-based edtech web application that delivers dashboards for school district managers to monitor key metrics of schools. I was the senior React engineer in charge of architecting and building the platform from scratch. I used functional components, Tailwind CSS, and hooks to build the UI of the application. GraphQL was incorporated to communicate with the API, and I also added storybooks for documentation and Cypress.io for E2E tests.

NFT App on the Solana Blockchain

Built an application that allows users with NFTs in their wallets to interact with other users on a social messaging platform. NFTs in wallets can be seen by any user who is a friend, NFT activity is fetched in real-time for each wallet to observe, and NFTs can be shared in messages with animations.

CYA eCommerce Platform

https://cya.insure
An eCommerce platform built with Angular allows for insurance sales from the web. This app supports secured payment processing, complex cart functionality, email verification and confirmation, discounts, bundling, bulk ordering, dynamic product rendering, and other valuable features.

Education

2014 - 2018

Bachelor of Science Degree in Computer Science

Hartwick College - Oneonta, NY, USA

Skills

Libraries/APIs

React, Node.js, React Redux, REST APIs, React Router, D3.js, Stripe, Web3.js, Antd, Vue, OpenAI API

Tools

Git, Figma, Jira, JavaScript Testing, GitHub, Prisma, Sketch, Builder.io, Google OR-Tools

Languages

JavaScript, Sass, TypeScript, SCSS, HTML, CSS, HTML5, GraphQL, Python, CSS3, Less

Frameworks

Material UI, Cypress, Angular, Jest, Tailwind CSS, Next.js, React Native, Jasmine, Redux, Bootstrap, Remix, AngularJS, Express.js

Paradigms

REST, UI Design, UX Design, Agile, Mobile Development, Testing, HIPAA Compliance

Platforms

Amazon Web Services (AWS), Webflow, Blockchain, Firebase, Google Cloud Platform (GCP), Vercel, Linux, Heroku, Replit

Storage

PostgreSQL, Databases, MySQL, Microsoft SQL Server, MongoDB, Amazon S3 (AWS S3)

Other

Storybook, User Interface (UI), Full-stack, UI Development, CI/CD Pipelines, React Hooks, Front-end, QA Testing, Back-end, API Integration, Front-end Development, Cryptocurrency, Solana, Apollo, Web 3.0, Tailwind UI, Artificial Intelligence (AI), Full-stack Development, Data Cleansing, Supabase, Figma Make

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