Justin Marsh
Staff Software Engineer at LinkedIn
Sunnyvale, California, United States
Summary
👤
Senior🎓
Top SchoolJustin Marsh is a Staff Software Engineer with nine years at LinkedIn, currently leading the Experimentation Platform (LiX / T-REX) and architecting high-performance infrastructure that enables safe, incremental rollouts and advanced targeting for company-wide experiments. He combines deep systems expertise with practical product safety, having designed holdouts, mutually exclusive experimentation, and a low-disruption ramping system that preserves backward compatibility. Based in Sunnyvale, he blends technical leadership with hands-on implementation, driving architecture, design, and delivery for critical backend services with stringent performance requirements. Before engineering, Justin spent over a decade as a professional poker player, a background that sharpened his game-theory thinking and probabilistic decision-making—skills he applies to complex distributed systems and experimentation design.
9 years of coding experience
6 years of employment as a software developer
Computer Software Engineering, Computer Software Engineering at Holberton SchoolComputer Science, Computer Science at University of Illinois Urbana-Champaign
English
Github Skills (11)
mount6
avro3
ansible3
java3
vagrant3
docker3
nodejs2
mongodb2
javascript2
python2
testing1
Programming languages (1)
Github contributions (5)
j-tyler/simple_shell
Dec 2016 - Dec 2016
Contributions:39 PRs, 101 pushes, 28 branches in 17 days
shellholbertonbash
j-tyler/holbertonschool-sysadmin_devops
Oct 2016 - Mar 2017
Contributions:225 pushes, 1 branch in 5 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.