Antonio Javier Sandoval

Overview

21 years around startups; now investing in fintech. Led or co-led 30 investments, 9 of them now at Series B or later. Before that: PayPal and Intel. Open-source contributor on weekends.

Replies on weekends

Experience

1. Partner

   Mar 2026 - Present
   Thornfield Capital · 7 mo · Full-time · Chicago, IL
   • Moved 75% of web traffic off a legacy monolith without a customer-facing incident.
   • Shipped a rewrite that took build times from 15 minutes to under 2.
2. Senior Data Engineer

   Jul 2023 - Mar 2026
   PayPal · 2 yr 8 mo · Full-time · Chicago, IL
   • Replaced 38 hand-built dashboards with one metrics layer people trust.
3. Engineering Manager

   Jul 2020 - Jul 2023
   Intel · 3 yr · Full-time · Chicago, IL
   • Cut p99 latency on the web services from 301ms to 139ms.
   • Cut the main bundle by 69% and got LCP under 2.7 seconds.
4. Director of Engineering

   Nov 2016 - Jul 2020
   EY · 3 yr 8 mo · Full-time · Chicago, IL
   • Wrote the venture capital service that now handles 5 million requests a day.
   • Cut p99 latency on the web services from 530ms to 58ms.
5. Senior Engineering Manager

   Jun 2015 - Aug 2016
   VMware · 1 yr 2 mo · Full-time · Chicago, IL
   • Reduced cloud spend on web by 45% in two quarters.
   • Mentored 12 engineers through their first promotion.

No references yet.

Education

1. Ohio State University

   BA, Finance
   2000 - 2004