Bjørn Seime
Principal Software Engineer at Vespa.ai
Trondheim, Trøndelag, Norway
Summary
🤩
Rockstar🎓
Top SchoolBjørn Seime is a Principal Software Engineer with 13 years of experience building and maintaining large-scale backend systems, currently at Vespa.ai in Trondheim. He brings deep Java expertise and a strong focus on code quality and test modernization, evidenced by extensive JUnit 4→5 migrations across the flagship open-source Vespa engine. Previously at Yahoo for nearly a decade, he has broad experience in performance-sensitive systems and production-grade engineering practices. His background includes database benchmarking work at Oracle and practical full-stack intern projects, showing a blend of research-minded rigor and hands-on delivery. Comfortable in both collaborative and leadership roles, he pairs MSc-level computer science training from NTNU and time at UC San Diego with a steady track record of improving long-lived codebases. An understated strength is his focus on improving developer experience through disciplined testing and maintainability efforts that pay off across large distributed codebases.
13 years of coding experience
9 years of employment as a software developer
Norges teknisk-naturvitenskapelige universitetUniversity of California San Diego
Stackoverflow
1,270reputation
167kreached
19answers
6questions
android-fragments
top-5%
Github Skills (12)
testing10
javas10
junit10
maintenance10
java10
android-fragments9
foreign-keys6
entity-framework6
android6
android-viewpager6
android-view6
vespa6
Programming languages (9)
Github contributions (5)
vespa-engine/vespa
Jun 2016 - Jan 2023
AI + Data, online. https://vespa.ai
Role in this project:
Backend Developer
Backend DeveloperContributions:1793 reviews, 5101 commits, 3543 PRs in 6 years 8 months
Contributions summary:Bjørn primarily worked on converting test codebases from JUnit 4 to JUnit 5 across multiple Java projects within the Vespa engine repository. These projects include `predicate-search-core`, `clustercontroller-reindexer`, `controller-api`, `predicate-search`, `container-disc`, `configserver-flags`, and others. Their contributions involved modifying existing test files to adhere to JUnit 5's API and features, indicating a focus on code quality and maintenance within the Java codebase of the project.
vespacppservingpythondata-science
bjorncs/chess-saldo
Mar 2013 - Jun 2017
Contributions:24 commits, 1 push in 4 years 3 months
norwegiancustomersandroidoperatorandroid-app
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.