Jason Rosenfeld
Engineer at Cash Flow Portal
Menlo Park, California, United States
Summary
👤
Senior🎓
Top SchoolJason Rosenfeld is an experienced engineer and team builder with 10+ years of designing and scaling backend distributed systems and a track record of shipping consumer products at massive scale. He spent nearly 14 years as an early and principal engineer at Lyft, where he led efforts in reliability, data storage and caching, zero-downtime migrations, cost reduction, and hiring and mentoring hundreds of engineers while helping the company grow from couch‑office startup to IPO. Based in Menlo Park, he now applies that product-focused, user-first engineering mindset to consulting and new roles at Candid Health and Cash Flow Portal. Equally passionate about teammates and customers, he’s known for blending hands-on technical execution with culture-building and pragmatic product decisions (including features like driver tips). A Northwestern CS graduate, he brings deep distributed-systems expertise and a rare combination of operator experience and long-term people leadership.
10 years of coding experience
8 years of employment as a software developer
Bachelor of Science (BS) Computer Science, Bachelor of Science (BS) Computer Science at Northwestern University
Github Skills (10)
r-package9
knitr7
literate-programming6
rmarkdown6
pipeline6
r6
data-science5
mlops5
trend1
sweave1
Programming languages (2)
Github contributions (5)
w201rdada/portfolio-jrosenfeld13
Nov 2017 - Nov 2017
Contributions:16 pushes in 8 days
reactgithub-classroomjavascriptreactjstypescript
jrosenfeld13/W205-Exercise-1
Oct 2017 - Oct 2017
Contributions:21 pushes, 1 branch in 12 days
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