Dennis Acar
Staff Backend Engineer at Holidu
Hamburg, Germany
Summary
👤
Senior🎓
Top SchoolDennis Acar is a Head of GTM Systems and AI Transformation Lead with eight years of hands-on experience building backend systems and leading AI-enabled product initiatives. At Holidu he progressed from Senior Software Engineer to Staff Backend Engineer and now leads go-to-market systems and AI transformation, blending technical delivery with strategic impact. He previously founded and led development at DataGym.ai, bringing practical expertise in ML annotation tooling and project leadership. A regular tech speaker and bootcamp facilitator, he prioritizes knowledge sharing to uplift teams and accelerate adoption of best practices. Based in Hamburg, he pairs engineering rigor with a love for the outdoors—often scouting alpine landscapes for photography, a hobby that reflects his eye for detail and patience in problem solving.
8 years of coding experience
7 years of employment as a software developer
Fachinformatiker - Anwendungsentwicklung, Fachinformatiker - Anwendungsentwicklung at CIM GmbH
German, English
Github Skills (56)
recovery10
sign-in-with-apple10
user-management10
lidar10
identity9
theming9
labeling9
passkey9
bounding-box9
data-labeling9
authentication9
semantic-segmentation9
okta9
jwt9
idp9
Programming languages (5)
Github contributions (5)
dacbreakpoint/dotfiles
Oct 2021 - Feb 2025
Contributions:43 pushes, 2 branches in 3 years 4 months
datagym-ai/datagym-core
Dec 2021 - Jan 2022
Open source annotation and labeling tool for image and video assets
Contributions:9 commits, 9 pushes, 2 branches in 27 days
annotationannotationsbounding-boxcomputer-visiondata-labeling
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