Daniel Sippel
Gründer at assetfy.com
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolDaniel Sippel is a Berlin-based Senior Full-Stack Developer with 11 years of experience delivering scalable web applications, currently focusing on proptech and web GIS. He combines deep PHP/Symfony back-end expertise with modern front-end skills (React) and has led projects as a freelancer and founder. He is the founder of assetfy.com, a real estate opportunities platform, and holds senior roles at Neopubli GmbH and Agile.Coach GmbH & Co. KG, driving product-focused delivery in fast-paced environments. His career spans API design and secure authentication (FOSRestBundle, NelmioApiDocBundle, LexikJWTAuthenticationBundle) and building admin interfaces with SonataAdminBundle. Based in Berlin, he leverages local market knowledge and cross-functional collaboration to ship reliable, user-centric systems at scale. His long-running freelance work since 2014 demonstrates adaptability across startups and agencies, from e-commerce to government tech, with a practical penchant for pragmatic, scalable solutions.
11 years of coding experience
2 years of employment as a software developer
Fachinformatiker Anwendungsentwicklung, Fachinformatiker Anwendungsentwicklung at Ferdinand-Braun-Schule Fulda
English, German
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (100)
api-platform10
mapbox-gl10
backend10
symfony510
bundle10
drawing10
easyadmin10
currency-exchange-rates10
admin10
symfony-bundle10
symfony10
mapbox-gl-js10
generator10
admin-generator10
php10
Programming languages (7)
Github contributions (5)
danielsippel/mapbox-gl-draw
Jan 2023 - Feb 2025
Draw tools for mapbox-gl-js, fixes "Unable to preventDefault inside passive event listener invocation." error on chrome mobile.
Contributions:8 pushes in 2 years 1 month
event-listenerinvocationfixesmapboxdraw
danielsippel/EasyAdminBundle
Apr 2022 - Jan 2023
EasyAdmin is a fast, beautiful and modern admin generator for Symfony applications.
Contributions:2 pushes in 9 months
easyadminadminbundlephpsymfony-bundle
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.