Sean Gallagher
Senior Software Engineer at Instacart
Old Toronto, Ontario, Canada
Summary
🤩
Rockstar🎓
Top SchoolSean Gallagher is a Senior Software Engineer based in Old Toronto with five years of professional engineering experience and a Computer Science degree from the University of Toronto Scarborough. He has progressed through hands-on roles at Laserfiche and Instacart, where he now builds scalable backend systems and contributes to production-grade services. Sean is an active open-source back-end contributor—having improved parsing, data types, and image-processing parameters in the notable pixray project—demonstrating attention to configurability and robustness. His background includes analytical roles in government and finance, giving him a practical appreciation for quality assurance and data-driven development. Colleagues would describe him as a pragmatic engineer who balances shipping features with thoughtful design and maintainability.
4 years of coding experience
8 years of employment as a software developer
Bachelor’s Degree, Computer Science, GPA 3.3 of 4.0, Bachelor’s Degree, Computer Science, GPA 3.3 of 4.0 at University of Toronto Scarborough
Github Skills (8)
text-parsing10
parsing10
argument-parsing10
python10
testing9
unit-test9
unit-testing9
regular-expression8
Programming languages (5)
Github contributions (5)
pixray/pixray
Feb 2022 - Mar 2022
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 20 commits, 14 PRs in 1 month
Contributions summary:Sean contributed to the `pixray` repository by implementing and refining core functionalities. They added a unit parsing function, enhanced pipe parsing, and integrated unit parsing into overlay-related arguments. They also updated data types and adjusted parameters for image processing, demonstrating a focus on improving the flexibility and configurability of the system.
sgallag-insta/pixray
Dec 2021 - Jul 2022
Contributions:4 PRs, 65 pushes, 21 branches in 7 months
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