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Hi, I'm Ujjwal Kumar, a frontend-focused software engineer with a mechanical engineering background. I enjoy transforming complex requirements into intuitive, scalable web applications. In my roles at Signzy and upliance.ai, I built onboarding flows, real-time features, and admin dashboards using React, Next.js, and web technologies to improve user experience and performance.…

Ujjwal Kumar

Full Stack Developer, Front-End Developer, Back-End Developer, +3

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Hi, I'm Ujjwal Kumar, a frontend-focused software engineer with a mechanical engineering background. I enjoy transforming complex requirements into intuitive, scalable web applications. In my roles at Signzy and upliance.ai, I built onboarding flows, real-time features, and admin dashboards using React, Next.js, and web technologies to improve user experience and performance.…

Available to hire

Hi, I’m Ujjwal Kumar, a frontend-focused software engineer with a mechanical engineering background. I enjoy transforming complex requirements into intuitive, scalable web applications.

In my roles at Signzy and upliance.ai, I built onboarding flows, real-time features, and admin dashboards using React, Next.js, and web technologies to improve user experience and performance.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Work Experience

SDE 1 at Signzy

November 1, 2025 - Present

Built and maintained Axis Bank's POS DIY user onboarding flow using Next.js, enabling seamless self-onboarding for merchants. Developed a secure landing page to capture and validate user inputs (PAN number, mobile number) with real-time verification. Implemented multi-step onboarding pages form state management using Sessions to improve completion rates.

SDE 1 (Frontend) at upliance.ai

May 1, 2024 - October 1, 2025

Developed a dynamic homepage leveraging JSON stored in AWS S3, enabling seamless updates to the homepage by modifying the JSON file without requiring client-side intervention. Implemented real-time bidirectional WebSocket sync between a mobile app and an IoT cooking device to display live progress and allow pause/resume from the mobile app. Designed and implemented a Recipe Admin Dashboard for real-time data updates via dynamic forms. Boosted performance by ~40% using windowing and pagination, and integrated AI endpoints to auto-generate and edit recipes. Revamped authentication in IoT device with access and refresh tokens and QR-code login. Built PostgreSQL materialized views for analytics, optimized queries with indexes, and automated refreshes. Implemented internationalization (i18n) with Google Translate API. Optimized homepage and recipe list performance with windowing (react-window).