Klas Mellbourn
Full Stack Engineer at Klarna
Stockholm, Stockholm County, Sweden
Summary
👤
Senior🎓
Top SchoolKlas Mellbourn is a seasoned Full Stack Engineer and founder with over three decades of software development experience, currently focused on frontend and mobile systems using TypeScript, React, React Native, and Node. He founded Capenta AB in 2004 and has repeatedly led large-scale app initiatives—most notably architecting FirstVet’s first React Native app and contributing to Klarna’s checkout and app for millions of users. Comfortable across architecture, monorepos, CI/CD, and automated testing, he blends hands-on coding with systems thinking and on-call reliability for high-traffic production services. Known for high individual productivity in large engineering organizations, he also brings entrepreneurial instincts from founding and scaling consultancies and product teams. Based in Stockholm with an MSc in Engineering Physics from KTH, he pairs deep technical craft with a practical focus on user-friendly, scalable solutions—and describes himself off-hours as a “nerdy dad” and coder-for-hire.
11 years of coding experience
19 years of employment as a software developer
MSc Engineering Physics, MSc Engineering Physics at KTH Royal Institute of TechnologyNaturvetenskapliga linjen datorinriktning, Naturvetenskapliga linjen datorinriktning at Östra Reals Gymnasium
English, Swedish
Stackoverflow
43,350reputation
9.0mreached
332answers
82questions
git
top-1%
naming-conventions
top-5%
javascript
top-5%
azure-devops
top-5%
version-control
top-5%
cmd
top-5%
Github Skills (200)
benchmark10
glance10
powerline10
visual-studio10
multiarch10
multiple-machines10
pattern10
spice10
nodejs10
zsh10
php10
completions10
python10
annotations10
bash10
Programming languages (18)
Github contributions (5)
Mellbourn/saved-counter
Feb 2020 - Jan 2023
AWS Serverless Application Model based graphql app for storing counters online
Contributions:2 PRs, 19 pushes, 8 branches in 2 years 11 months
serverlessaws-lambdaawslambdamodel-based
Mellbourn/dmarc-source-lookup
Nov 2016 - Jan 2023
Contributions:8 pushes, 9 branches, 1 issue in 6 years 3 months
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