Headline

Senior Software Engineer (SDE 2) | AI | React, Node.js, TypeScript | Full Stack Product Engineering | System Design

About

Senior Software Engineer (SDE 2) with 6+ years of experience building scalable, high-performance products across frontend and backend systems. Currently at Papaya Global, I work on enterprise products impacting 40K+ users, contributing across frontend architecture, APIs, real-time systems, and complex product workflows. One of my key contributions involved building an AI-powered support platform integrating frontend experiences, backend systems, and automation workflows that reduced support workload by ~95%. My core expertise spans React, Next.js, TypeScript, Node.js, PostgreSQL, MongoDB, AWS, scalable architectures, and product engineering. Over the years, I’ve worked across frontend systems, backend services, API integrations, developer tooling, performance optimization, and real-time systems. I enjoy solving engineering problems at the intersection of user experience, scalability, and business impact — building products end-to-end with strong ownership. Recently, I built DSA Puzzles, an interactive platform helping developers learn DSA through visual puzzles, guided hints, dry runs, coding workflows, interview insights, and AI-powered guidance. Open to opportunities in Software Engineering, Full Stack Engineering, Product Engineering, AI-powered systems, and global product teams.

Location

Bengaluru

AI stack

claude code

codex

cursor

grok

githubcopilot

ChatGPT

Work experience

SDE II at Papaya Global, Feb 2024 - Present · 2 yrs 5 mos, Bengaluru, • Led development of an AI-powered support platform used by 40K+ users, reducing support workload by ~95%. • Architected and scaled a microfrontend platform (15+ applications) using Module Federation. • Built high-performance real-time chat systems handling 10K+ messages with optimized rendering. • Led React + TypeScript frontend architecture across multiple projects and mentored engineers. • Collaborated across frontend and backend services, APIs, and automation systems to deliver scalable enterprise workflows.

SDE II at CashFlo, Feb 2023 - Feb 2024 · 1 yr 1 mo, Bengaluru, • Built organization-wide microfrontend architecture using Single-SPA. • Eliminated cross-team dependencies and improved deployment speed. • Led Angular → React migration improving maintainability. • Reduced load time by ~25%. • Built scalable finance/payment workflows and reusable components using Storybook.

Software Engineer at PharmEasy, Oct 2021 - Jan 2023 · 1 yr 4 mos, Bangalore Urban, • Developed critical homepage and checkout experiences serving ~1M+ daily users. • Reduced redundant API calls by ~30% improving performance and UX. • Built reusable UI components and optimized user-facing experiences for scale.

Software Engineer at ShopX - 10i Commerce Services Pvt Ltd, Jan 2021 - Sep 2021 · 9 mos, Bangalore Urban, • Built and optimized consumer-facing web experiences integrated within the ShopX app. • Managed retailer-facing microfrontend applications within the ShopX Business ecosystem, improving performance and scalability.

Software Development Engineer at RentoMojo, Jun 2020 - Jan 2021 · 8 mos, Bengaluru, • Managed logistics backend infrastructure using Fastify. • Built frontend (ReactJS) and backend (NestJS) systems for internal CX dashboards. • Built and optimized delivery service backend workflows using Fastify. • Maintained admin systems using AngularJS and LoopBack.

Software Development Intern at RentoMojo, Aug 2019 - May 2020 · 10 mos, Bengaluru, Karnataka, India, • Built internal CX dashboard features using ReactJS and NestJS. • Contributed to admin platform and delivery app features using AngularJS, LoopBack, and React Native.

Education

Bachelor of Technology (B.Tech.), Computer Science, Lovely Professional University

The Century School

Public links

github: https://github.com/ujjwal8880

leetcode: https://leetcode.com/ujjwal19

ujjwalsinghal.is-a.dev: https://ujjwalsinghal.is-a.dev/