Paul Reinheimer
President And Co-Founder at WonderProxy
Waterloo, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolPaul Reinheimer is a seasoned software leader and entrepreneur with 16 years of experience, co-founding and serving as President of WonderProxy to simplify localization testing. He combines hands-on backend engineering—evident from notable open-source contributions to XHGui/XHProf profiling tools—with product leadership roles at Stripe and FreshBooks. Paul has a track record of improving performance tooling, database integrations (including MS SQL Server and MongoDB), and data visualization like D3-based waterfall views. His career spans startups and established engineering organizations, blending technical depth in profiling and backend systems with operational leadership. Based in Waterloo, Ontario, he brings an engineer’s curiosity rooted in a Computer Science degree and an affinity for turning diagnostic tools into practical workflows. An uncommon strength is his long-term commitment to both shipping developer-facing open-source utilities and scaling a commercial SaaS from founding to maturity.
16 years of coding experience
7 years of employment as a software developer
Sheridan CollegeBachelor of Computer Science, Bachelor of Computer Science at University of Windsor
Stackoverflow
3,722reputation
215kreached
157answers
4questions
php
top-5%
Github Skills (29)
performance-monitor10
performance-analytics10
website-development10
code-profiling10
mysql10
user-interface10
mongodb-database10
webui10
php10
performance-analysis10
profiling10
web-development10
performance-monitoring10
mongodb10
sql9
Programming languages (8)
Github contributions (5)
preinheimer/xhprof
Apr 2010 - Jun 2016
XHGUI is a GUI for the XHProf PHP extension, using a database backend, and pretty graphs to make it easy to use and interpret.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:175 commits, 6 PRs, 6 pushes in 6 years 2 months
Contributions summary:Paul primarily contributed to the development and enhancement of the XHProf GUI for the XHProf PHP extension. Their work involved core functionalities, including adding features such as table sorting and a pie chart to display the exclusive wall time breakdown. Furthermore, the user integrated configuration options and refactored code to improve performance and readability, ultimately leading to more efficient data analysis within the profiling tool. The user also worked on database schema updates and SQL syntax to support MS SQL Server integration.
backend-databasexhprofphpxhguigui
perftools/xhgui
Nov 2012 - May 2015
Web interface for XHProf profiling data can store data in MongoDB or PDO database
Role in this project:Back-end Developer
Back-end DeveloperContributions:58 commits, 1 push, 2 comments in 2 years 6 months
Contributions summary:Paul focused on developing features for the XHGui web interface, specifically related to analyzing XHProf profiling data. Their contributions include creating a utility file with functions to calculate exclusive times for functions, integrating these values into the front-end, and creating a custom page for generating views based on database queries. They also implemented the waterfall view by incorporating D3.js and other front end libraries to render profiling data as a chart. The commits demonstrate a focus on building the core analytical capabilities of the XHGui application.
xhprofprofilingweb-interfacephpext-pdo
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