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I'm SIVAGNANA SOWNDARYA R, a Frontend Engineer specializing in React and React Native, passionate about building scalable, high-performance, user-centric applications. As a co-founder of Mistake.cool, I’ve shipped real-time features and led products from concept to production. If you need more information or want to hear some crazy stories, please reach out.…

SIVAGNANA SOWNDARYA R

Front-End Developer, Web Developer, Full Stack Developer, +2

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I'm SIVAGNANA SOWNDARYA R, a Frontend Engineer specializing in React and React Native, passionate about building scalable, high-performance, user-centric applications. As a co-founder of Mistake.cool, I’ve shipped real-time features and led products from concept to production. If you need more information or want to hear some crazy stories, please reach out.…

Available to hire

I’m SIVAGNANA SOWNDARYA R, a Frontend Engineer specializing in React and React Native, passionate about building scalable, high-performance, user-centric applications.

As a co-founder of Mistake.cool, I’ve shipped real-time features and led products from concept to production. If you need more information or want to hear some crazy stories, please reach out.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Tamil

Advanced

English

Advanced

Work Experience

Co-Founder & Frontend Engineer at mistake.cool

January 1, 2024 - Present

Co-founded Mistake.cool; built and launched cross-platform mobile app (Android & iOS) with React Native; designed 50% of UI screens in Figma (UI & UX); implemented real-time chat/audio/video using WebSockets and LiveKit; implemented authentication flows (multi-account, organization-based access); integrated payment UIs with Stripe and Razorpay; built scalable file upload, notifications, and background services; extended product with web (Vite + React) and desktop (Electron); created custom charts (bar, pie, area) with Rough.js; led onboarding, product demos, and sales; managed app deployment including iOS code signing and Electron packaging.

Associate Product Engineer at Temenos

December 1, 2021 - December 1, 2023

Built components for banking entity migration; optimized APIs and improved response performance; designed and enhanced UI/UX flows for better usability and consistency; contributed to frontend performance and stability in a banking environment.

Program Analyst Trainee (Intern) at Cognizant

March 1, 2021 - December 1, 2021

Trained in JavaScript, testing, and UI development; built a railway ticket booking web app using HTML, CSS, and JavaScript.