Stefan Magnuson
Senior Software Developer - Search Foundations
London, England, United Kingdom
Summary
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Rockstar🎓
Top SchoolStefan Magnuson is a Senior Software Developer with 12 years of experience combining machine learning research and hands-on engineering to build production search and relevance systems. Currently at Shopify he designs search foundations—from embedding choices and relevance engineering to building a new reranker—and previously shipped automated XGBoost reranking pipelines, vector search stacks and a Stable Diffusion prototype that influenced Shopify Magic. A PhD-trained ML researcher turned Ruby/Rails and Python practitioner, he brings deep algorithmic roots alongside pragmatic cloud-native delivery on AWS. He has a history of founding and scaling products (one acquired) and leading transformations of legacy Rails platforms into compliant, enterprise-grade services. Colleagues rely on him for bridging research and product: he turns models and experimental ideas into measurable improvements in real-world search.
12 years of coding experience
13 years of employment as a software developer
Doctor of Philosophy (Ph.D.) Machine Learning, Doctor of Philosophy (Ph.D.) Machine Learning at The University of ManchesterGeorge Watson's CollegeAS & A2 Japanese Japanese, AS & A2 Japanese Japanese at Manchester College of Arts and Technology
English, Japanese, Icelandic
Stackoverflow
880reputation
168kreached
14answers
0questions
Github Skills (139)
relevance10
elasticsearch-plugin10
recurring10
recurring-events10
integrate10
periodic10
undelete10
elasticsearch9
itunes9
migration9
soft-delete9
periodic-tasks9
java9
mp3-files9
amazon9
Programming languages (10)
Github contributions (5)
styrmis/beginning-core-data-with-rubymotion
Apr 2014 - Dec 2014
Contributions:32 commits in 8 months
styrmis/dotfiles
Sep 2015 - May 2023
A set of vim, zsh, git, and tmux configuration files.
Contributions:51 pushes, 1 branch in 7 years 9 months
vimtmuxtmux-configurationconfiguration-filesneovim
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