AeroLeads people directory · profile
Sean Gaffney Email & Phone Number
Senior Engineering Manager, Web Platforms
at
The Athletic
1 work email found
@seangaffney.cc
6 phones found area 718, 702, 864, 727, and 512
LinkedIn matched
✓ Verified Jun 2026
4 data sources
Profile completeness 86%
Current company
Role
Senior Engineering Manager, Web Platforms
Location
Greenville, South Carolina, United States
Who is Sean Gaffney? Overview
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Quick answer
Sean Gaffney is listed as Senior Engineering Manager, Web Platforms at The Athletic, based in Greenville, South Carolina, United States. AeroLeads shows a work email signal at seangaffney.cc, phone signal with area code 718, 702, 864, 727, 512, and a matched LinkedIn profile for Sean Gaffney.
Sean Gaffney previously worked as Senior Engineering Manager at Etsy and Engineering Manager at Etsy. Sean Gaffney holds Bachelor Of Science - Bs, Mechanical Engineering from Clemson University.
Company email context
Email format at The Athletic
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{first}@seangaffney.cc
86% confidence
AeroLeads found 1 current-domain work email signal for Sean Gaffney. Compare company email patterns before reaching out.
Profile bio
About Sean Gaffney
I’m a software engineering leader focused on building strong teams and delivering impactful results. With a keen eye for data and a commitment to clear documentation, I lead teams to deliver large-scale, complex product, platform, and infrastructure projects. My goal is always to contribute to the success of the whole organization, not just individual pieces.My deepest experience lies in frontend platforms and web performance, where I enjoy helping teams build faster, more reliable, and accessible web experiences that make real impact. But I'm at home across the stack, and love diving into new challenges and technologies.Above all, I’m dedicated to supporting people. I believe that every challenge is an opportunity for a team to shine, and my greatest fulfillment comes from empowering others to do their best and most meaningful work.Feel free to reach out anytime–I’d love to chat.
Current workplace
Sean Gaffney's current company
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11 roles
Sean Gaffney work experience
A career timeline built from the work history available for this profile.
Senior Engineering Manager
- Led the Frontend Rendering Infrastructure team, responsible for Etsy’s internal web framework, extending support for views, templates, and view models, while driving many organization-wide efforts including.
- Led adoption of server-rendered React technology (Component Islands), covering 90% of Etsy’s buyer funnel and enabling dynamic interfaces.
- Delivered major projects on time, including migrating all buyer-facing pages to a new Application Shell, improving load speeds and conversion rates.
- Conducted Product User Research, creating a 2-year roadmap with enhanced documentation, tooling, and framework features.
- Founded and led the Frontend Architecture Advisory Group, establishing best practices across engineering.
- Launched and directed the Frontend Training Working Group, delivering its first training program.
Apr 2021 - Dec 2023
Engineering Manager
- Led Design Systems, Frontend Systems, and Web Performance teams, often concurrently.
- Managed the Frontend Systems team, delivering key projects like a dynamic CSS server, a React-like interface for PHP templates, and infrastructure for Preact-based Component Islands.
- Created and led the JavaScript Modernization Working Group, executing a multi-year roadmap to modernize Etsy’s JavaScript ecosystem across teams.
- Recruited and managed contractors to execute multiple technology migration projects successfully.
- Founded and scaled the Web Performance team to five members, driving initiatives like relaunching internal metrics tools, upgrading data pipelines, and supporting product teams with performance expertise.
- Transitioned leadership of the Web Performance team to a new manager, ensuring team continuity and career growth for contributors.
Apr 2017 - Apr 2021
Engineering Manager
- Managed 12 direct reports across three teams (web and mobile products) as part of Treehouse’s first management cohort during its transition from a flat to hierarchical structure.
- Managed software engineers and designers, combining experience in both fields to provide effective leadership.
- Grew the engineering team from 3 to 25+ members with innovative hiring practices, achieving near-zero turnover.
- Partnered with a VP to accelerate management growth through mentorship, book clubs, and hands-on experience.
May 2015 - Apr 2017
Software Developer
Shaped Treehouse’s engineering culture as the third engineering hire, contributing to team growth and defining technical direction.
Apr 2012 - May 2015
Co-Founder
Aug 2012 - Aug 2015
Software Engineer
Sep 2010 - Apr 2012
Freelance Web Developer
Mar 2008 - Sep 2010
Database Administrator
Jun 2006 - Jan 2009
Structural Dynamics And Vibrations Intern
May 2004 - Dec 2004
Analysis Acoustics Co-Op
Jan 2003 - Dec 2003
2 education records
Sean Gaffney education
Bachelor Of Science - Bs, Mechanical Engineering
Clemson University
Business Bridge Program, Business/Commerce, General
The Tuck School Of Business At Dartmouth
FAQ
Frequently asked questions about Sean Gaffney
Quick answers generated from the profile data available on this page.
What company does Sean Gaffney work for?
Sean Gaffney works for The Athletic.
What is Sean Gaffney's role at The Athletic?
Sean Gaffney is listed as Senior Engineering Manager, Web Platforms at The Athletic.
What is Sean Gaffney's email address?
AeroLeads has found 1 work email signal at @seangaffney.cc for Sean Gaffney at The Athletic.
What is Sean Gaffney's phone number?
AeroLeads has found 6 phone signal(s) with area code 718, 702, 864, 727, 512 for Sean Gaffney at The Athletic.
Where is Sean Gaffney based?
Sean Gaffney is based in Greenville, South Carolina, United States while working with The Athletic.
What companies has Sean Gaffney worked for?
Sean Gaffney has worked for The Athletic, Etsy, Treehouse, Homebrewed, Inc., and Bellstrike.
How can I contact Sean Gaffney?
You can use AeroLeads to view verified contact signals for Sean Gaffney at The Athletic, including work email, phone, and LinkedIn data when available.
What schools did Sean Gaffney attend?
Sean Gaffney holds Bachelor Of Science - Bs, Mechanical Engineering from Clemson University.
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