Hi,

I'm Stefan Lengfeld. I'm a professional Embedded Linux and Embedded Android engineer and general open source enthusiast. Also I write blog posts occasionally . Check out the blog posts page and subscribe to the RSS feed.

If you want to contact me, just send me an email. For my other social media details, see the section social media below.

Apart from my contributions to other open source projects, I develop some open source projects on my own. Two highlights are subpatch and live555 unofficial archive and mirror. For a full list see the page projects.

A short CV of my career is further below. Here is a portrait of me:

my interests

My main topics of interest are

Linux kernel and board support development,
Android/AOSP platform engineering,
the Linux and Android graphics stack,
general bug-hunting, reverse engineering, system profiling,
complex build systems, git and release processes,
agile software development.

Apart from that I'm also a hobby photographer and generally a self-taught person.

hire me

You can hire me. I work for inovex and we do all sorts of contracting work, training and software projects from cloud engineering, ML applications, application development and embedded products. If interested, just email me.

sponsoring

If you like my open source work and projects, feel free to sponsor me. You can send me donations via

github sponsors,
paypal (Use the link @stefanlengfeld),
EU-SEPA wire transfer (Just send a mail and I reply with my IBAN details) and
in person (e.g. pay me a beer when we meet at a conference 😉).

If you want to receive a thank you postcard, let me know your address.

vita

Here is a short curriculum vitae of myself:

Since march 2017: Employed by inovex GmbH in Cologne
Dec. 2014 to Dec. 2016: Employed by PHYTEC Messtechnik GmbH in Mainz
May 2011 to Nov 2014: Research Assistant ("Wissenschaftliche Hilfskraft") at the compute centre/data center ("Zentrum für Datenverarbeitung")
March 2011 to Sep. 2014: Studying mathematics at the Johannes Gutenberg-Universität in Mainz. Final degree: Bachelor of Science
Sep. 2010 to Feb 2011: civil service ("Zivildienst") in Mainz
1990 to 2010: Childhood, elementary and secondary school near Nuremberg

My contact and social media details are

email: stefan+bloginput@lengfeld.xyz (see GPG key below)
github: github.com/lengfeld
linkedin: www.linkedin.com/in/stefan-lengfeld
youtube: www.youtube.com/@StefanLengfeld
sessionize: sessionize.com/stefan-lengfeld

gpg key

I have a gpg key. If you write me an email, you can use it. The key id is 0xE44A23B289092311. You can find it on public key servers, e.g. keyserver.ubuntu.com, or just directly download it here: key.gpg.

The key fingerprint is CAFC B28D 1612 3A5C 2D31 45F0 E44A 23B2 8909 2311.