Sam Jeffers
Co-Founder at Who Targets Me?
London, England, Ireland
Summary
👤
Senior🎓
Top SchoolSam Jeffers is a co-founder and product-focused leader with nine years of experience building mission-driven digital platforms that grow membership, improve civic transparency, and reduce churn. Based in London with roots in Ireland, he co-founded Join Together to help unions scale organising and revenue through secure, optimised membership systems, and Who Targets Me to research and campaign on political ad transparency. He blends strategy consulting (The Shop) with hands-on product leadership, drawing on a background in digital campaigning from Blue State Digital and a public policy education from Harvard Kennedy School and LSE. Known for turning complex social problems into testable, low-risk prototypes, he pairs commercial acumen with civic-minded advocacy — and once toured internationally as a drummer, a detail that hints at his collaborative, creative approach to problem solving.
9 years of coding experience
13 years of employment as a software developer
MPP, Public Policy, MPP, Public Policy at Harvard Kennedy SchoolBSc, International Relations, 1st class honours, BSc, International Relations, 1st class honours at London School of Economics and Political Science
French
Github Skills (4)
transparency10
advertising10
disclosure10
ads9
Programming languages (3)
Github contributions (5)
WhoTargetsMe/ad-transparency-standards
Dec 2020 - Jan 2023
A proposed schema for disclosure of advertising transparency data.
Contributions:26 commits, 32 pushes, 2 comments in 2 years 1 month
advertisingdata-transparencydisclosuretransparencystandards
rgarner/polit-ads
Sep 2020 - Nov 2020
Political FB ads for the US election campaign 2020
Contributions:192 commits, 2 PRs, 7 pushes in 2 months
politicaladselection
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