Dan Larsen
Founder at Cortexium
Copenhagen, Capital Region of Denmark
Summary
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RockstarDan Larsen is a founder and seasoned software engineer with 13+ years building scalable, high-performance systems from the frontend to custom databases and microservices. Based in Copenhagen, he has repeatedly transformed complex, overengineered platforms—most recently as CTO/co-founder at FlowStack where he rebuilt the stack for reliability and efficiency—and now leads Cortexium. He thrives on rapid prototyping and pragmatic product engineering, blending hands-on coding (Go, Docker, databases) with security-minded platform ownership and customer-facing assessments. An active open-source contributor, he improved Google’s gnostic OpenAPI codegen plugin to better handle Protobuf types and nested messages, showing his attention to interoperability and developer ergonomics. Equally comfortable inventing new tooling (a pre-Vue.js SPA framework) and hoarding data for research, he pairs entrepreneurial instincts with deep technical craftsmanship.
13 years of coding experience
15 years of employment as a software developer
English, Danish
Stackoverflow
131reputation
15kreached
1answer
0questions
Github Skills (9)
code-generation10
go10
api10
openapi10
protocol-buffers10
json-schema8
syntax6
php6
switch-statement6
Programming languages (6)
Github contributions (5)
google/gnostic
Apr 2021 - Feb 2022
A compiler for APIs described by the OpenAPI Specification with plugins for code generation and other API support tasks.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:50 reviews, 17 commits, 19 PRs in 9 months
Contributions summary:Dan primarily focused on enhancing the `protoc-gen-openapi` plugin for the `gnostic` repository. Their contributions included adding support for features such as handling nested messages, Google Protobuf types (Struct, Value, and Empty), and improved query parameters. They also implemented options for JSON naming and versioning, improving the plugin's flexibility and functionality for generating OpenAPI specifications. Furthermore, the user updated the plugin to address issues, such as Google API HTTP body.
openapi-codegenprotocol-bufferscode-generationlintersapi
nosco/multi-cluster
Dec 2012 - Mar 2015
Contributions:51 commits, 1 PR, 2 pushes in 2 years 2 months
signalsignal-handlingnode-jsjavascriptspawning
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