Evan Lok
Principal Software Engineer at Upstart
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolEvan Lok is a Principal Software Engineer in San Francisco with 13 years building scalable web applications and platform services, primarily in Ruby on Rails. He has led engineering teams and architecture initiatives at companies like Upstart, Tanium, and Opower, designing microservices platforms, SSO-enabled multi-app UIs, and performance-focused refactors. Evan combines full-stack expertise—databases (MySQL/Postgres), front-end tooling (Webpack, AngularJS), and cloud infrastructure—with hands-on delivery of high-throughput systems such as video generation engines and email pipelines. He’s repeatedly improved performance and stability through pragmatic engineering (for example, doubling email throughput and cutting content tool latency in half). Comfortable in both startup and enterprise contexts, he bridges product and platform concerns to ship reliable systems on aggressive timelines. Evan’s background shows a pattern of creating reusable frameworks and automation that scale teams as well as systems.
13 years of coding experience
14 years of employment as a software developer
MiramonteUniversity of California, Irvine
Github Skills (64)
sidekiq10
ruby10
preloader10
jruby10
columns9
zuora9
directive9
scroll8
buffer8
ruby-client8
rails8
container-image8
faraday8
error-reporting7
exceptions7
Programming languages (3)
Github contributions (5)
evanlok/belongs_to_hstore
Oct 2013 - Sep 2015
Create ActiveRecord belongs_to associations using postgresql hstore columns
Contributions:19 commits, 1 push in 1 year 10 months
railsrubyhstorecolumnspostgres
evanlok/spring
Dec 2022 - Oct 2024
Rails application preloader
Contributions:3 pushes, 1 branch in 1 year 10 months
railsrails-applicationrubypreloader
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