Prathamesh Viraj Chavan

Overview

I've spent 7 years on payments infrastructure - first at Qualcomm, now at Mill Bio. Brought on-call pages for payments platform down from 35 a week to 3. Designed the reconciliation system that matches 1 million transactions a day. Before that: EY and Qualcomm. I write a small newsletter about payments infrastructure.

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Experience

1. Senior Backend Engineer

   Apr 2025 - Present
   Mill Bio · 1 yr 6 mo · Full-time · Pune, India
   • Moved 82% of payments platform traffic off a legacy monolith without a customer-facing incident.
   • Designed the reconciliation system that matches 4 million transactions a day.
   • Led the migration of 69 services to Go.
2. Backend Engineer

   Sep 2022 - Apr 2025
   EY · 2 yr 7 mo · Full-time · Pune, India
   • Shipped 20 launches on the payments platform team without a rollback.
   • Shipped a rewrite that took build times from 16 minutes to under 2.
3. Backend Engineer

   Nov 2019 - Sep 2022
   Qualcomm · 2 yr 10 mo · Full-time · Pune, India
   • Brought on-call pages for payments platform down from 12 a week to 3.

Projects

No references yet.

Education

1. IIIT Hyderabad

   B.Tech, Computer Science
   2015 - 2019