Leslie Fletcher is a Senior Software Engineer with 15 years of experience building backend and middleware systems, primarily with Ruby on Rails, across Silicon Valley startups and now based in North Vancouver. With a Master's in Computational Mathematics from Stanford and a joint CS/Math degree from Harvey Mudd, Leslie combines strong theoretical grounding with practical systems experience from roles at Later, Tophatter, Blippy, and Tagged. He’s shipped mobile clients (iOS and Android), led migrations (Rails 3→4), and has experience running and improving performance testing for high-profile open-source projects like Netflix’s fast_jsonapi. Comfortable mentoring and leading engineering efforts, he’s also a past lead who scaled teams and product pipelines while influencing mobile UX and operational infrastructure. Recently relocated to Vancouver for personal reasons, Leslie seeks challenging work locally and is not open to relocation.
15 years of coding experience
19 years of employment as a software developer
Bachelor’s Degree Joint Computer Science and Math, Bachelor’s Degree Joint Computer Science and Math at Harvey Mudd College
Master’s Degree Computational Mathematics, Master’s Degree Computational Mathematics at Stanford University
No Longer Maintained - A lightning fast JSON:API serializer for Ruby Objects.
Role in this project:
QA Engineer / Test Automation Engineer
Contributions:8 commits, 8 PRs, 12 comments in 7 months
Contributions summary:Leslie primarily focused on enhancing the testing infrastructure and improving the performance testing of the `fast_jsonapi` library. They implemented and modified performance specifications, added instrumentation for ActiveSupport::Notifications, and created new test scenarios to validate the library's serialization performance against other serialization libraries such as AMS (ActiveModelSerializers) and jsonapi-rb. The user also reworked aspects of the existing testing notifications, adding and removing aliases.
Contributions:6 commits, 1 PR, 16 pushes in 1 year 4 months
ethereumsolidityenvhelpers
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Leslie Fletcher - Senior Software Engineer at Later