Doug Tollefson
IBM Infrastructure, Performance Engineer
Rochester, Minnesota, United States
Summary
👤
Senior🎓
Top SchoolDoug Tollefson is an experienced performance and infrastructure engineer with 13+ years at IBM optimizing enterprise and cloud-native systems, currently focused on hybrid cloud performance and cost reduction. He combines hands-on Java performance tuning (GC, DB2, Solr, Spark) with automation and load-simulation expertise to deliver scalable, resource-efficient SaaS architectures on Kubernetes and Red Hat OpenShift. An award-winning innovator and patent holder for HTTP request management techniques, he serves as an internal SME guiding cross-functional teams through rigorous performance testing and release-to-release improvements. Doug is also an active contributor to the Acme Air sample app—adding JMeter-driven workload tooling and full-stack enhancements—underscoring his blend of tooling, benchmarking, and application-level experience. Based in Rochester, MN, he pairs deep technical troubleshooting with mentorship and practical architecture redesigns that measurably cut infrastructure footprints.
12 years of coding experience
4 years of employment as a software developer
Computer and Information Science, Computer Science, Computer and Information Science, Computer Science at Minnesota State University, Mankato
Github Skills (7)
javas10
json10
jmeter10
java10
performance-testing9
rest-api9
front-end-development8
Programming languages (2)
Github contributions (5)
acmeair/acmeair
Jun 2013 - Aug 2015
A Java implementation of the Acme Air Sample Application.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:3 releases, 56 commits, 2 PRs in 2 years 2 months
Contributions summary:Doug primarily worked on the `acmeair/acmeair` project, which implements the Acme Air Sample Application in Java. Their contributions included adding the `acmeair-driver` project and implementing several JMeter functions such as `FlightsPostProcessor` and `UpdateCustomerFunction`. Further modifications included updates to the jMeter script and the addition of the reporter and mobile projects. These changes suggest involvement in both the backend and frontend aspects of the application, including performance testing.
javaairacmesample-application
acmeair/acmeair.github.io
Jul 2015 - Aug 2015
Contributions:6 commits, 5 pushes, 1 branch in 22 days
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