Cooper Gillan
Senior Software Engineer at Braintree
Chicago, Illinois, United States
Summary
👤
Senior🎓
Top SchoolCooper Gillan is a Staff Software Engineer in Chicago with 11 years of experience building reliable, scalable backend systems for payments, futures and options, and health insurance domains. He currently leads technical efforts in money-movement and treasury reliability at PayPal/Braintree, with a strong track record in CI/CD, cloud migrations, and production debugging across large backend applications and data pipelines. Equally comfortable in code and data, Cooper moved from data warehousing and analytics into backend engineering, bringing deep SQL/Postgres, ETL, and observability expertise to reduce toil and improve team workflows. He mentors engineers, champions clear, data-backed PRs and commit messages, and prefers simplifying systems—even if it means deleting code. An active contributor to Apache Airflow, he’s applied rigorous testing and type-annotation improvements to widely used workflow tooling.
11 years of coding experience
High School, General Studies, High School, General Studies at Canyon Del Oro High SchoolBachelor’s Degree, Physics, Cum Laude, Bachelor’s Degree, Physics, Cum Laude at North Park University
English, Spanish
Stackoverflow
86reputation
1kreached
7answers
0questions
Github Skills (19)
apache-airflow10
postgresql10
python10
devops9
sql9
jenkins-ci9
jenkins9
type-checking8
docker8
typehinting8
dockers8
aws7
database6
sorting6
php6
Programming languages (6)
Github contributions (5)
apache/airflow
Jan 2019 - Nov 2021
Apache Airflow - A platform to programmatically author, schedule, and monitor workflows
Role in this project:
Backend & DevOps Engineer
Backend & DevOps EngineerContributions:2 reviews, 35 PRs, 126 comments in 2 years 10 months
Contributions summary:Cooper primarily contributed to improving the Apache Airflow project by fixing bugs and optimizing existing functionalities. They addressed issues related to the PostgresHook and SqliteHook, ensuring correct connection management. The user also refactored test modules, introducing parameterization to improve test coverage and maintainability, demonstrating proficiency in testing practices. Additionally, the user added type annotations to the Sendgrid module and expanded unit tests for JenkinsJobTriggerOperator.
monitorpythonschedulerapacheprogrammatically
coopergillan/airflow
Aug 2019 - Feb 2024
Apache Airflow
Contributions:152 pushes, 48 branches in 4 years 6 months
apacheairflowapache-airflow
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