JP Hastings-Edrei
Principal at Yomly
London, England, United Kingdom
Summary
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Rockstar🎓
Top SchoolJP Hastings-Edrei is a Principal software engineer based in London with 17 years of experience designing and shipping highly scalable payments and backend systems for fast-moving technology startups. He spent a decade-plus at Deliveroo rising to Principal Engineer, and now consults and leads engineering at Inflection Engineering and Yomly, bringing deep production and architectural expertise. JP combines hands-on backend work—improving testing, concurrency, and integrations in open-source projects like mailman—with a track record of stabilising complex payment flows at scale. Trained as a physicist at Nottingham and Oxford, he blends rigorous analytical thinking with practical engineering leadership and a knack for quietly fixing thorny reliability and testing issues that often go unnoticed.
17 years of coding experience
11 years of employment as a software developer
Master of Science - MS Physics, Master of Science - MS Physics at University of NottinghamMPhys Physics, MPhys Physics at University of Oxford
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (5)
testing10
rspec10
ruby10
http8
rack7
Programming languages (21)
Github contributions (5)
mailman/mailman
Mar 2015 - Jun 2015
An incoming mail processing microframework in Ruby
Role in this project:
Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:1 release, 10 commits, 15 PRs in 2 months
Contributions summary:JP primarily focused on improving the testing infrastructure and test coverage for the Mailman project. Their contributions included updating test syntax to use RSpec 3, adding timeout functionality to address potential test stalls, and fixing an issue related to threading in the test suite. Furthermore, the user implemented header matching and testing improvements, and wrote a new parser to support receiving emails over HTTP using Sendgrid.
mailmicroframeworkmtaincomingemail
dotpostcard/postcards-html
Sep 2022 - Nov 2024
Contributions:18 releases, 65 pushes, 1 branch in 2 years 1 month
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