Mainak Chakrabortty
Senior Frontend Engineer | Microfrontend Architect | React · TypeScript · Node.js | PayPal · Zoom · Walmart | Scaling platforms for 300M+ users
- Role
- Senior Software Engineer at PayPal
- Location
- Bengaluru, KA, IN
- LinkedIn followers
- 500 followers
About Mainak Chakrabortty
Senior Frontend Engineer with 9+ years building and scaling high-traffic web platforms at PayPal, Zoom, and Walmart — systems used by 300M+ users and 35M+ global merchants.I specialize in Microfrontend architecture and React/TypeScript ecosystems, turning complex legacy systems into modular, observable, high-performance products with real business impact. Selected Impact- PayPal — Cut incident detection from hours → under 5 mins with Datadog observability. Accelerated merchant onboarding by 30% with zero regressions- Zoom — Led microfrontend migration cutting release cycles by 40% and deployment incidents by 65% across 6 teams. Expanded payments to 10+ international markets- Walmart — Built React grid handling 500K+ SKUs with 40% rendering performance improvement- TCS/Deutsche Bank — Drove 35% agent productivity gain via D3.js dashboards and 45% rendering optimization. Core Stack:React.js · Next.js · TypeScript · Vue.js · Node.js · Redux/RTKModule Federation · GraphQL · REST · Design SystemsAWS (S3, CloudFront, Lambda) · Datadog · CI/CD · Webpack/ViteJest · Playwright · Storybook · PCI-DSS patterns🤖 AI-augmented dev: Claude Code · Cursor AI · GitHub Copilot Bengaluru | Open to Senior / Staff Frontend Engineer rolesPortfolio:
Experience
Senior Software Engineer
Oct 2024 — Present · Bengaluru, IN
Leading frontend architecture for PayPal\'s merchant onboarding platform, serving 35M+ global merchants worldwide- Architected a modular merchant onboarding platform — establishing engineering standards for modularity, performance, and observability adopted across the entire onboarding org- Cut MTTD from hours to under 5 minutes by instrumenting end-to-end observability with Datadog (RUM + APM + Alerting), increasing merchant activation success rates by 18%- Led the MUMA enterprise onboarding initiative, coordinating Backend, Customer Support & Account Management — accelerating onboarding cycles by 30%, delivered on schedule with zero regressions.
Education
Birbhum Institute of Engineering and Technology 118
Bachelor of Technology - BTech, Electrical Engineering
2012 — 2016
Scaler
Mentee, Computer Science
2020 — 2022
Skills
- Electrical Engineering
- Matlab
- C
- Microsoft Office
- Engineering
- C++
- Microsoft Excel
- Microsoft Word
- Powerpoint
- Windows
- Programming
- Core Java
- J2ee Web Services
- Web Development
- Angularjs
- Angular 2
- Javascript
- Sql
- Oracle Database
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