Summary
Overview
Work History
Skills
Timeline
Generic

Sanjoy Sardar

Senior Software Engineer - Angelone, Ex - Hotstar, AJIO, MCA-IIT. Roorkee

Summary

Senior Frontend Engineer with over 10 years of experience in developing and scaling consumer platforms with over 1 million daily active users. Expertise in frontend architecture, design systems, and performance engineering. Demonstrated ability to drive technical leadership and cross-team collaboration, resulting in significant business outcomes.

Overview

10
10
years of professional experience

Work History

Senior Software Engineer

Angel One
02.2023 - Current
  • Owned the Storefront frontend platform architecture, scaling 20+ modules across the Angel One super app using microfrontends.
  • Led delivery of business-critical trading journeys (chart-based core trading, FnO, MTF, PnL), serving 1.6M+ DAU.
  • Designed and scaled an in-house Svelte Design System, improving UI consistency and reducing multi-team delivery effort by ~30%.
  • Built shared frontend platform libraries (HTTP, logging, analytics, broadcast, payments), standardizing core capabilities and facilitating cross-team collaboration.
  • Led web performance initiatives driving significant page-load improvements and measurable engagement uplift.
  • Partnered with SRE on near zero-downtime deployments using ECS, CodeDeploy, Cloudflare CDN, S3, and service-worker caching.
  • Optimized containerized frontend workloads on AWS, reducing infrastructure costs by ~15%.
  • Drove AI-assisted development adoption (Cursor, Gemini) via custom IDE rules enforcing standards and design-token compliance.

Senior Software Engineer

Hotstar
02.2021 - 02.2023
  • Served as core engineer and architect for Identity Web Platform, encompassing authentication and onboarding processes.
  • Drove 9% increase in Airtel activations during IPL 2022 through targeted enhancements.
  • Developed user profiles and parental controls to enhance platform functionality.
  • Implemented device management solutions to streamline user experience.

Software Development Engineer II

AJIO
03.2019 - 02.2021
  • Engineered AJIO Lite (PWA) optimizing load time from ~18s to under 3s via performance-driven architecture.

SDE II

Meaww
01.2018 - 01.2019

SDE I

Zillious Solutions
01.2015 - 01.2016

Skills

  • JavaScript (ES6)
  • React framework
  • Svelte
  • Solid
  • Nextjs
  • HTML5
  • CSS3
  • Redux
  • Microfrontend architecture design
  • Performance optimization strategies
  • Web Vitals
  • Progressive Web Applications (PWA)
  • Web Workers
  • Service Workers
  • Offline functionality implementation
  • WebSocket
  • Real-time communication solutions
  • Event streaming techniques
  • Tailwind CSS
  • User experience design principles
  • Compliance with web standards
  • Webpack
  • Vite
  • CI/CD pipelines
  • AWS cloud services
  • Grafana monitoring solutions
  • Leadership in technical projects
  • Cross-team collaboration

Timeline

Senior Software Engineer

Angel One
02.2023 - Current

Senior Software Engineer

Hotstar
02.2021 - 02.2023

Software Development Engineer II

AJIO
03.2019 - 02.2021

SDE II

Meaww
01.2018 - 01.2019

SDE I

Zillious Solutions
01.2015 - 01.2016
Sanjoy Sardar