Roger Guldbrandsen
Software Engineer at Mercari, Inc.
Osaka, Japan
Summary
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Rockstar🎓
Top SchoolRoger Guldbrandsen is a software engineer with 11 years of experience, currently building products at Mercari in Osaka. He focuses on backend development and developer experience, contributing to notable open-source projects such as the Go Fiber web framework where he improved core documentation, clarified configuration semantics, and cleaned up defaults for better usability. Comfortable working across code and docs, he brings a pragmatic mindset—“the absence of a particular solution is never the problem; the problem is the problem”—that favors clear, maintainable systems. A Bath alumnus, he pairs solid engineering fundamentals with an eye for developer-facing details that reduce onboarding friction. Colleagues rely on him to translate ambiguous behaviors into predictable defaults and readable guidance.
11 years of coding experience
Bachelor’s Degree, Bachelor’s Degree at University of Bath
Norwegian, Japanese, English
Stackoverflow
2,076reputation
162kreached
24answers
17questions
java
top-5%
Github Skills (20)
go10
documentation10
api-design9
back-end-development9
java9
backend9
rest-api8
golang8
expressjs8
application-framework7
app-framework7
web-framework7
mockito6
android6
mocking6
Programming languages (13)
Github contributions (5)
gofiber/fiber
Jul 2020 - Jan 2024
⚡️ Express inspired web framework written in Go
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 reviews, 1 PR, 8 comments in 3 years 6 months
Contributions summary:Roger primarily focused on improving the documentation and settings of the Go Fiber web framework. Their contributions included clarifying the functionality of settings like 'Immutable', 'Static', and others, ensuring accurate descriptions and default values. They also cleaned up the code by using constants for default properties and fixing formatting issues in the documentation. This work enhances the usability and clarity of the framework's core configurations.
golangexpressjsexpressfiberframework
kinbiko/bugsnag
May 2020 - Aug 2022
Well-documented, maintainable, idiomatic, opinionated, and *unofficial* rewrite of the Bugsnag Go notifier
Contributions:6 releases, 17 reviews, 118 commits in 2 years 3 months
golangidiomaticpanicdocumentederror-monitoring
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