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Gagan User

@gaganuser4

Senior Frontend Engineer at Rival Systems building real-time trading software that stays responsive under live market updates.

India

Message

At Rival Systems, I build frontend features for electronic trading and risk products across desktop, web, and mobile. I developed a real-time risk app with streaming updates, alerts, scenario views, and CSV and Excel exports.

I made the interface handle live updates across 500+ instruments using virtualized tables and other performance improvements, removing freezes users had reported during volatile market sessions. I also shipped a React Native trading app and built compliance and margin workflows that connect to a .NET service over NATS.

Before Rival Systems, I co-founded IAmEars and built its mental health platform from scratch to 65,000+ registered users. Earlier, I built GST workflows at ClearTax and real-time chat and notification features at Curofy.

Experience

Work history, roles, and key accomplishments

Current

Web Application Developer (Senior Frontend Engineer)

Current

Rival Systems

Apr 2023 - Present (3 years 6 months)

Built features for the Electron + React/TypeScript desktop trading client and developed a real-time risk web app with WebSocket streaming. Shipped a React Native mobile trading app and made the UI hold up under load with virtualized tables and live updates.

React TypeScript Electron Vite WebSockets ExcelJs PapaParse React Native Expo Auth0 .NET NATS Sentry IIS Virtualized Lists Accessibility

Co-Founder and Lead Engineer

IAmEars

Feb 2022 - Mar 2023 (1 year 1 month)

Built an anonymous mental health support platform from scratch to 65,000+ registered users, owning the frontend, backend, infrastructure, and technical roadmap. Ran the cloud stack on AWS and GCP with Dockerized services and zero-downtime deploys.

React NodeJS AWS GCP Docker Nginx Data Modeling API Design

Frontend Developer II (Senior Frontend Engineer)

ClearTax

Dec 2020 - Jan 2022 (1 year 1 month)

Built GST automation and payment workflows in React and Next.js, used by 500+ business customers. Built accessible UI components with semantic HTML and ARIA to meet WCAG standards.

React Next.js WCAG ARIA Semantic HTML API Integration Testing

Software Developer (Full-Stack)

Curofy

Jul 2016 - Dec 2020 (4 years 5 months)

Cut infrastructure requirements by 75% by consolidating services and tuning load balancing and caching. Built real-time chat and notification features for a network of 200,000+ verified doctors.

Infrastructure Optimization Load Balancing Caching Real time Chat Notifications