Felix Dahlke
Founder And CEO at D&F Ventures GmbH
Cologne, North Rhine-Westphalia, Germany
Summary
🤩
Rockstar🎓
Top SchoolFelix Dahlke is a founder and seasoned technology leader with 17 years of experience building and scaling consumer and infrastructure products, most notably as CTO and Managing Director at eyeo where he grew monthly active users from ~20M to ~120M and annual revenue to €55M. He blends hands-on systems and full-stack engineering (web, mobile, systems, game dev and AI) with leadership in remote-first organizations, offering fractional/interim CTO services through Dahlke Tech. Felix has scaled engineering teams dramatically, led complex restructurings while preserving flat hierarchies, and shipped cross-platform browser extensions, apps and high-traffic backends. He’s an active open-source contributor, with work in projects like Emscripten and the popular Eclipse Color Theme repository, reflecting deep interest in tooling and developer experience. Now bootstrapping product experiments alongside consulting and startup investing, he combines entrepreneurial grit with a pragmatic, process-focused approach to software and team development. An unusual strength: he pairs low-level systems chops with product-scale operational experience, making him comfortable from device drivers to billion-request services.
17 years of coding experience
17 years of employment as a software developer
Bachelor of Science (Honours), Computing, Bachelor of Science (Honours), Computing at The Open University
Github Skills (15)
theme-development10
javas10
emscripten10
javascript10
webassembly10
eclipse10
blazor-webassembly10
sdl10
java10
color-scheme10
rust-wasm9
c119
c179
xml8
css8
Programming languages (16)
Github contributions (5)
eclipse-color-theme/eclipse-color-theme
Jan 2011 - Sep 2016
Color themes for Eclipse
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:254 commits, 10 PRs, 10 pushes in 5 years 9 months
Contributions summary:Felix primarily contributed to the Eclipse Color Theme project by implementing and generalizing color theme functionality. They added support for various editors (Java, XML, HTML, CSS, JavaScript, C++, JSP, PHP, and Ant) and introduced several new color themes like Zenburn, Inkpot, Obsidian, and Tango. Their work involved modifying preference pages, integrating theme settings, and adjusting mappings to apply colors to editor elements.
color-themeseclipse-plugindark-themeeclipsethemes
emscripten-core/emscripten
Mar 2013 - Oct 2014
Emscripten: An LLVM-to-WebAssembly Compiler
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:15 commits in 1 year 7 months
Contributions summary:Felix contributed primarily to the SDL (Simple DirectMedia Layer) component of the Emscripten project. They implemented features like rotozoomSurface and TTF_FontHeight, while also addressing existing issues by refactoring the code. Further contributions include refactoring the surface handling code, addressing performance issues with canvas reuse.
emscriptenwebassemblycompilerwasmllvm
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