Development projects
  • (2023 - 2024) Porting drivers for Qualcomm ath11k wifi devices from Linux to OpenBSD. With the OpenBSD Foundation.

  • (2019 - 2024) Development of a CVS repository loader for the Software Heritage archive. Improvements for corresponding Subversion and Git loaders, as well as Dulwich. With INRIA.

  • (2023) Improving the stabilty, feature set, and user interface of NSH. With Wireless Connect.

  • (2017 - 2024) Design and implementation of an open-source Git-compatible version control system called Game of Trees. Self-funded community effort.

  • (2015 - 2023) Added 802.11n and 802.11ac support to the OpenBSD wireless subsystem. Ported drivers for Intel 11ac wifi devices from Linux to OpenBSD. With Genua.

  • (2007 - 2023) Development of features and bug fixes for Subversion. With elego Software Solutions.

  • (2018) Development of minor features and fixes for various issues in Osmocom. With Sysmocom.

Consulting projects
  • (2018, 2024) Workshops for OpenBSD firewall administrators. With Linux Hotel.

  • (2007 - 2024) Migrations to Subversion and Git from other version control systems. Subversion server upgrades. Long-term Subversion support. Training of developers and system administrators. With elego Software Solutions.

  • (2017 - 2024) Setup and maintenance of high-availability OpenBSD firewalls and VPN, spanning 3 office locations within the city of Berlin. With Eidotech.

  • (2019, 2020) Advice on usage, configuration, and maintenance of OpenBSD systems. Analysis of VPN service distruption. With SYS.

  • (2018) Prototyping of a 300+ firewall deployment with automated OpenBSD installation for internal evaluation. With the German Federal Institute for Risk Assessment.

  • (2016) Support of implementation and maintenance of a dozen+ OpenBSD firewall setup spanning two data centres in Luxembourg. With Digital Ekho.

About

Chirpy Software was founded in 2024 by Stefan Sperling. Before 2024 these projects were handled by Stefan on a freelancing basis. As of 2024, on-going projects are handled by Chirpy Software.