Matthias Nehlsen
Founder - Consultant at Nehlsen EDV Beratung GmbH
Berlin, Germany
Summary
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Rockstar🎓
Top SchoolMatthias Nehlsen is a multidisciplinary software engineer and founder with over a decade of experience building systems that range from single-server apps to distributed platforms handling hundreds of millions of events per day. He blends hands-on engineering with product-focused collaboration, working closely with business teams to design technology that fits consumer and market needs. Comfortable across a wide tech stack—C#, Clojure/ClojureScript, Scala, TypeScript, Rust, Go and more—he moves between backend, frontend and infrastructure work including Terraform. Matthias has held senior and executive engineering roles at companies like DREST and Klarna while running his own consultancy since 2003, demonstrating both delivery and leadership in startups and large organisations. An active open-source author on GitHub, he jokes that he "creates technical debt for a living," reflecting a pragmatic, iterative approach to engineering. Based in Berlin, he pairs technical breadth with long-term client partnerships and a taste for solving complex distributed systems problems.
13 years of coding experience
8 years of employment as a software developer
Professional Certificate in Management Business Administration and Management General, Professional Certificate in Management Business Administration and Management General at The Open UniversityMSc Information Technology, MSc Information Technology at University of Liverpool
German, English
Stackoverflow
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Github Skills (200)
end-to-end-encryption10
healthkit10
mobile-development10
windows10
muon10
flame10
wysiwyg10
flutter-widget10
agentic-workflow10
dmg10
agentic-ai10
matrix10
app-framework10
snap10
clojure10
Programming languages (16)
Github contributions (5)
matthiasn/systems-toolbox
Feb 2015 - Dec 2019
Tools and building blocks for building Systems in Clojure and ClojureScript
Contributions:478 commits, 27 PRs, 423 pushes in 4 years 10 months
clojureclojurescript
matthiasn/systems-toolbox-sente
Dec 2015 - Jul 2018
Sente WebSockets components (client and server) for systems-toolbox
Contributions:103 commits, 9 PRs, 107 pushes in 2 years 6 months
websocket
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