John Ma
Software Developer at Jobber
Old Toronto, Ontario, Canada
Summary
👤
Senior🎓
Top SchoolJohn Ma is a full‑stack software developer with nine years of experience building backend APIs, React frontends, and data-driven features across startups and scaleups in Toronto. At Jobber he serves as scrum master and code owner for a Rails/GraphQL backend, led revenue visualization and reporting work with Rockset, and even tuned an LLM for an AI assistant. His background includes Elixir-based sportsbook APIs, gRPC migrations, and performance-focused tooling, alongside earlier roles delivering full-stack Rails/React solutions and CI automation. Comfortable across languages and domains—from game and ML experiments to digital art—he blends pragmatic engineering with data-informed product work. A University of Waterloo alum pursuing advanced CS/data science study, he brings a pattern-seeking mindset that surfaces profitable insights from complex systems.
9 years of coding experience
2 years of employment as a software developer
Highschool Diploma, Highschool Diploma at Earl of March Secondary SchoolMaster's degree Computer Science/ Data Science, Master's degree Computer Science/ Data Science at University of Illinois Urbana-ChampaignBachelor's degree Computer Science, Bachelor's degree Computer Science at University of Waterloo
English, French
Github Skills (16)
bigbluebutton10
preprocessing8
data-mining7
clinical-research6
python5
deep-learning5
component-library4
algorithm4
neuroevolution4
react4
testing4
omniauth3
office3653
ruby-on-rails3
atlantis2
Programming languages (6)
Github contributions (5)
jiama843/john-ma-web-v3
Oct 2018 - Nov 2025
Personal website for 2018 created with :thinking: in Ruby on Rails. Hosted on https://john-ma-personal-web.herokuapp.com/
Contributions:5 PRs, 28 pushes, 6 branches in 7 years 2 months
ruby-on-rails
jiama843/2D-Experiments
Dec 2017 - Apr 2024
Contributions:6 pushes, 1 branch in 6 years 5 months
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