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