Jonathan Klein, Developer in Boston, MA, United States
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Jonathan Klein

Verified Expert  in Engineering

Software Developer

Location
Boston, MA, United States
Toptal Member Since
May 22, 2015

Jonathan is a Lead Engineer at Attend.com, where he focuses on solving both front-end and back-end issues. He started the Boston Web Performance Meetup Group, and he contributes to a few open source projects, including the HTTPArchive, WebPagetest, and CSSLint. He is also the co-creator of Hound and wpt-script, two open source projects built at Etsy.

CSSPHPSQLMySQLNode.jsSubversion (SVN)GitjQueryAgile Software DevelopmentPostgreSQLPackerVagrantLaravelRuby on Rails (RoR)React

Portfolio

Attend.com
AngularJS, Apache, Ruby on Rails (RoR)
Etsy
MySQL, React, JavaScript, Git, Chef, PHP
Wayfair
SQL, JavaScript, CSS, ASP, Subversion (SVN), PHP

Experience

HTML - 7 yearsCSS - 7 yearsJavaScript - 5 yearsPHP - 4 yearsMySQL - 3 yearsChef - 2 yearsjQuery - 2 yearsLaravel - 1 year

Availability

Part-time

Preferred Environment

Sublime Text 3, Vagrant, GitHub

The most amazing...

...tool I've open sourced is Hound, a code search tool built at Etsy.

Work Experience

Lead Engineer

2015 - PRESENT
Attend.com
  • Focused on front-end architecture and building a strong engineering team.
Technologies: AngularJS, Apache, Ruby on Rails (RoR)

Senior Software Engineer

2012 - 2015
Etsy
  • Wrote public-facing site performance reports on Etsy’s “Code as Craft” blog, communicating quarterly load time metrics for etsy.com.
  • Deployed and managed a custom WebPagetest instance on Amazon EC2 cloud servers, which was used to monitor site performance.
  • Open-sourced wpt-script, a WebPagetest client that makes it easy to automatically run tests and gather data from WebPagetest.
  • Open-sourced Hound, a code search tool which became Etsy’s third most popular open source project within one month of launch.
  • Conducted performance audits across Etsy.com and built tooling to make regressions easier to identify and fix.
Technologies: MySQL, React, JavaScript, Git, Chef, PHP

Senior Software Engineer

2008 - 2012
Wayfair
  • Received 2009 “Founder’s Award for Innovation,” given to one employee each year hand-picked by the company founders out of 500+ candidates for outstanding contributions to the business.
  • Promoted three times in less than four years, which was dramatically faster than peers.
  • Led a team of five internal engineers and four remote contractors to rewrite Wayfair.com's code base using PHP, incorporating site design and brand overhaul.
  • Trained and led a four-person CSS team during a redesign of all 200+ CSN Stores websites in 2009, establishing company-wide coding conventions and best practices.
  • Built new features for the customer-facing websites as well as back-end tools to make it easier for our marketing team to make data changes.
Technologies: SQL, JavaScript, CSS, ASP, Subversion (SVN), PHP

Hound

https://github.com/etsy/Hound
A code search tool that I built with another engineer during my time at Etsy.

Languages

PHP, HTML, CSS, JavaScript, SQL, Python

Frameworks

Ruby on Rails (RoR), Laravel, ASP, AngularJS

Storage

Memcached, PostgreSQL, MySQL

Other

Front-end Development, Software Development

Libraries/APIs

Node.js, jQuery, React

Tools

Subversion (SVN), Sublime Text 3, Packer, Vagrant, Chef, Git, Apache, GitHub

Paradigms

Agile Software Development

Platforms

Amazon EC2

2004 - 2008

Bachelor of Science Degree in Astronomy and Physics

Haverford College - Haverford, PA