Calvin Tam
Senior Software Engineer at Atlassian
Sydney, New South Wales, Australia
Summary
🤩
Rockstar🎓
Top SchoolCalvin Tam is a Senior Software Engineer based in Sydney with 15 years of experience building backend systems and shipping reliable web platforms at companies like Atlassian, Lyft, Facebook and the Chan Zuckerberg Initiative. He blends deep Ruby on Rails expertise with experience across Elixir/Phoenix and test automation, contributing to high-profile open-source projects such as rails, devise, capybara, and SimpleForm. Known for thoughtful refactors and improving developer ergonomics, his work often focuses on I18n, testing infrastructure, and integrations (e.g., payment gateways and authentication flows). He has moved between hands-on engineering and technical leadership roles, guiding teams as an engineering manager and staff engineer while remaining an active contributor to OSS. A practical problem-solver, he’s comfortable optimizing both core library behavior and large-scale API features. Outside product work, his contributions reveal an attention to maintainability and developer experience that quietly improves many downstream projects.
15 years of coding experience
9 years of employment as a software developer
UNSW Sydney
Stackoverflow
24,579reputation
1.2mreached
304answers
17questions
sinatra
top-5%
documentation
top-5%
regex
top-5%
ruby
top-1%
rspec
top-5%
rake
top-5%
Github Skills (73)
apim10
devise10
testing10
rspec10
authentication10
test-framework10
payment-gateway10
ruby10
e-mail10
i18n-js10
activerecord10
rack10
ruby-on-rails10
apache-phoenix10
javascript10
Programming languages (11)
Github contributions (5)
brainspec/enumerize
Jan 2012 - Dec 2022
Enumerated attributes with I18n and ActiveRecord/Mongoid support
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 7 reviews, 233 commits in 11 years
Contributions summary:Calvin primarily contributed to the `enumerize` gem, focusing on improving and refining its core functionality. They refactored and enhanced the I18n integration, added SimpleForm and Formtastic support, and incorporated RSpec matchers for testing. The user also addressed several bug fixes and enhancements related to the core `enumerize` logic and its integration with ActiveRecord, Mongoid, and Sequel.
mongoidrailsrubyactivemodelactiverecord
ryanb/letter_opener
Sep 2012 - Dec 2022
Preview mail in the browser instead of sending.
Role in this project:Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:163 commits, 60 PRs, 95 pushes in 10 years 4 months
Contributions summary:Calvin primarily contributed to improving the testing infrastructure and fixing bugs related to the letter_opener functionality. They refactored the delivery method specs, added new tests for features such as attachments, and ensured the correct handling of edge cases, including those with spaces in names and empty subject lines. The user also addressed issues related to email handling, such as array inputs for "reply_to", "cc" and "bcc" fields.
mailsmtpbrowseremailsending
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