Naoki Shimizu
Staff Software Engineer at Meta
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolNaoki Shimizu is a Staff Software Engineer based in New York with 12 years of experience building and operating large-scale backend systems and teams across the US and Japan. He progressed from hands-on engineering in Ruby and Go to senior leadership roles—Director of Engineering and Principal Software Engineer—guiding Mercari through startup, post-IPO and global expansion while owning platform, ML, and reliability initiatives. Naoki is skilled in microservices, Kubernetes, observability (OpenTelemetry), and performance tuning for gRPC, and has a track record of improving listing conversion and reducing latency through pragmatic architecture changes. He combines cross-functional leadership—managing distributed managers and driving company-wide engineering workgroups—with continued coding fluency, including full-stack Rails projects that integrate data visualization. His background in research internships applying SVMs and NLP, plus a published book on Selenium, highlight a long-standing blend of academic rigor, tooling expertise, and practical automation.
12 years of coding experience
10 years of employment as a software developer
Master of Engineering (M.Eng.), Computer Science, Master of Engineering (M.Eng.), Computer Science at Keio University
Japanese, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (18)
javascript10
rails10
activerecord10
ruby-on-rails10
data-visualizations9
c39
data-visualisation9
database-design9
c3js9
data-visualization9
bootstra8
html8
css8
bootstrap8
restful-api7
Programming languages (6)
Github contributions (5)
enechange/EnergyDataSimulationChallenge
Jan 2016 - Jan 2016
Challenge by ENECHANGE Ltd.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:19 commits, 1 PR in 3 days
Contributions summary:Naoki appears to be involved in the initial setup and development of a Ruby on Rails application. They initiated a new Rails project, removed Turbolinks, created several models (City, House, Energy), established associations between them, and implemented a controller with routes for data visualization. Furthermore, they installed necessary JavaScript libraries for the frontend and integrated a charting library to visualize energy-related data.
javaenergymodelicaprediction-model
deme0607/dotfiles
May 2015 - Nov 2020
Contributions:7 pushes in 5 years 7 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.