Ragnar
Summary
🤩
RockstarRagnar Lonn is an entrepreneurial technologist and explorer with 13 years of experience building and scaling internet products, from founding early ISPs to creating the popular k6 load-testing tool. He blends hands-on engineering in Go and JavaScript with product strategy and early-stage operations, repeatedly turning prototypes into commercially successful services like Load Impact/k6. Ragnar excels at starting things—identifying pragmatic solutions, shipping quickly, and iterating toward market fit—while mentoring teams and teaching stoic problem-solving. His open-source contributions to grafana/k6 include protocol test coverage and metric enhancements, reflecting a focus on reliability and developer experience. Based in Stockholm, he invests in and helps startups through Odd Parity, pairing technical depth with business pragmatism. An avowed generalist, he’s comfortable tackling anything from low-level test platforms to go-to-market execution.
14 years of coding experience
Stackoverflow
1,122reputation
131kreached
33answers
10questions
performance-testing
top-5%
Github Skills (20)
javascript10
performance-monitor10
apidoc10
testing10
loadtest10
http10
go10
performance-analysis10
api10
load-testing10
performance-testing9
s69
golang9
documentation8
cicd8
Programming languages (7)
Github contributions (5)
grafana/k6
Apr 2016 - Aug 2017
A modern load testing tool, using Go and JavaScript
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:3 releases, 77 commits, 17 PRs in 1 year 5 months
Contributions summary:Ragnar's contributions focused on enhancing the testing capabilities of the k6 load testing tool. They implemented and refined various API tests, including those for HTTP methods like TRACE, CONNECT, and OPTIONS. Additionally, the user made code improvements to ensure consistency and address minor issues, and they worked on improving the project's documentation and build processes, including adding an AGPL license. Furthermore, the user implemented enhancements such as the group_duration metrics and made auto-detection improvements.
gojavascripttestinggolangload-testing
pushdata-io/Arduino_ESP8266_SSL
Mar 2019 - Sep 2020
Pushdata client library for ESP8266/NodeMCU devices
Contributions:1 release, 1 review, 17 commits in 1 year 6 months
esp8266nodemcu
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.