AeroLeads people directory · profile
James Summerfield Email & Phone Number
Co-Founder and CTO
at
Phoebe
1 work email found
@google.com
2 phones found area 777
LinkedIn matched
✓ Verified May 2026
4 data sources
Profile completeness 100%
Current company
Role
Co-Founder and CTO
Location
Zug, Zug, Switzerland
Company size
Who is James Summerfield? Overview
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Quick answer
James Summerfield is listed as Co-Founder and CTO at Phoebe, a company with 12 employees, based in Zug, Zug, Switzerland. AeroLeads shows a work email signal at google.com, phone signal with area code 777, and a matched LinkedIn profile for James Summerfield.
James Summerfield previously worked as Co-Founder & CTO at Phoebe and CIO Stripe Europe & Head of Global Money Movement Network at Stripe. James Summerfield holds Bachelor Of Arts - Ba, Computer Science from University Of Oxford.
Company email context
Email format at Phoebe
This section adds company-level context without repeating James Summerfield's masked contact details.
{first_initial}{last}@google.com
86% confidence
AeroLeads found 1 current-domain work email signal for James Summerfield. Compare company email patterns before reaching out.
Profile bio
About James Summerfield
James Summerfield is a Co-Founder and CTO at Phoebe. He possess expertise in c++, java, python, software development, scalability and 19 more skills.
Listed skills include C++, Java, Python, Software Development, and 20 others.
Current workplace
James Summerfield's current company
Company context helps verify the profile and gives searchers a useful next step.
Phoebe
8 roles
James Summerfield work experience
A career timeline built from the work history available for this profile.
Co-Founder & Cto
CurrentBuilding in stealth. Hiring research engineers and software engineers in Europe. DM to learn more.
Dec 2023 - Present
Cio Stripe Europe & Head Of Global Money Movement Network
Led Stripe's global money movement network processing $1T annually across 100+ countries and 135 currencies. CIO of European regulated subsidiaries.
Nov 2021 - Dec 2023
Head Of Engineering, Youtube Studio
Led YouTube Studio web, mobile, and backend engineering, scaling platform infrastructure to 200+ engineers and shipping critical features including YouTube’s video upload flows used by millions of creators every day.
Oct 2017 - Nov 2021
Senior Staff Software Engineer, Google Ads
Architected real-time distributed systems processing petabytes of product data while building strategic partnerships with major e-commerce platforms.
May 2014 - Oct 2017
Head Of Engineering
Led engineering from founding to Google’s acquisition, building an ML-powered marketplace that helped retailers optimise product selection through predictive analytics.
May 2011 - May 2014
Founder
Led Quicksort from idea to acquisition, building a technical hiring platform adopted by Amazon, Facebook, Microsoft and powering over 500,000 coding assessments.
Jan 2009 - May 2011
Aug 2005 - Jan 2009
1 education record
James Summerfield education
-
University Of Oxford
FAQ
Frequently asked questions about James Summerfield
Quick answers generated from the profile data available on this page.
What company does James Summerfield work for?
James Summerfield works for Phoebe.
What is James Summerfield's role at Phoebe?
James Summerfield is listed as Co-Founder and CTO at Phoebe.
What is James Summerfield's email address?
AeroLeads has found 1 work email signal at @google.com for James Summerfield at Phoebe.
What is James Summerfield's phone number?
AeroLeads has found 2 phone signal(s) with area code 777 for James Summerfield at Phoebe.
Where is James Summerfield based?
James Summerfield is based in Zug, Zug, Switzerland while working with Phoebe.
What companies has James Summerfield worked for?
James Summerfield has worked for Phoebe, Stripe, Google, Rangespan (Acquired By Google), and Quicksort (Acquired).
How can I contact James Summerfield?
You can use AeroLeads to view verified contact signals for James Summerfield at Phoebe, including work email, phone, and LinkedIn data when available.
What schools did James Summerfield attend?
James Summerfield holds Bachelor Of Arts - Ba, Computer Science from University Of Oxford.
What skills is James Summerfield known for?
James Summerfield is listed with skills including C++, Java, Python, Software Development, Scalability, Distributed Systems, Databases, and Nosql.
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