Claims on a consultancy website are cheap.

Code merged into projects maintained by other people, where the bar for acceptance is set by someone with no reason to be generous. Plus the open-source driver SDK built in-house at Sensirion and published for its customers.

• Linux kernel — SGP30/SGPC3 gas sensor driver

  Authored the mainline driver for the Sensirion SGP30 and SGPC3 volatile-organic-compound sensors, with its device-tree binding. Extended the IIO subsystem’s ABI with ethanol and H₂ gas modifiers that any gas-sensor driver can use. ANSI C, i²c. Merged upstream in Linux 5.1 and shipping in every kernel since.

  Merged Mainline Linux This driver was reviewed and accepted into the upstream Linux kernel. Link to the upstream Linux commit drivers/iio/chemical/sgp30.c External file Opens the driver file on git.kernel.org. Open file on git.kernel.org IIO gas modifiers Device-tree support

• libiio — userspace library for Linux IIO devices

  Three merged changes to Analog Devices’ libiio, the library applications use to talk to IIO sensors: a crash fix in the iiod network daemon, updated channel type and modifier lists, and corrected channel-identifier heuristics.

  Merged Analog Devices libiio The iiod crash fix was reviewed and merged by the libiio maintainers. Link to the merged pull request Channel lists Identifier heuristics

• Sensirion — open-source embedded driver SDK

  Lead contributor to Sensirion’s portable C driver SDK for its gas (SGP), humidity and temperature (SHT, STS), CO₂ (SCD30) and particulate-matter (SPS30) sensors. The drivers share one hardware abstraction layer, embedded-common, that ports to any microcontroller or Linux board. Nearly 700 commits across Sensirion’s public repositories, 2015–2020, including releases, test pipelines and new-sensor support.

  Lead contributor Sensirion on GitHub Top contributor in six of the seven core driver repositories. Link to the contributor graph embedded-common Commits

• Linux kernel — checkpatch URL exemption

  Small checkpatch.pl change allowing long lines that contain a URL, so kernel commit messages and comments can carry unbroken links.

  Merged Mainline Linux This checkpatch change was reviewed and accepted upstream. Link to the upstream Linux commit scripts/checkpatch.pl External file Opens the checkpatch source file on git.kernel.org. Open file on git.kernel.org

• Git — gitweb security fix

  Fixed a case where gitweb could emit an HTML link built from unescaped input, producing invalid XHTML or potentially injected markup (a ref name such as “1.0.0&0.0.1”). Acked by the gitweb maintainer, merged by Junio Hamano.

  Security fix Merged into Git The security fix was accepted into the upstream Git project. Link to the upstream Git commit gitweb/gitweb.perl External file Opens the gitweb source file in Git’s GitHub repository. Open file on GitHub

• Sensirion SCD4x library — below-sea-level altitude compensation

  Worked out how to altitude-compensate the SCD40 CO₂ sensor below sea level, where the library’s setSensorAltitude() accepts only positive values. Published as an answer on the vendor’s Arduino driver repository.

  Solution Sensirion issue The below-sea-level compensation solution is published in Sensirion’s GitHub issue. Link to Sensirion’s GitHub issue

Peer-reviewed work in embedded and smart-home security.

• 2014 Using Near-Realtime Voice Data for Communication Authentication USENIX Security ’14 — poster session
• 2015 A Solution-Based Analysis of Attack Vectors on Smart Home Systems ZTE Communications, Vol. 13 No. 3
• 2015 A Solution Based Analysis of Attack Vectors on Smart Home Systems IEEE SSIC 2015 (conference paper)
• 2016 A Solution-Based Analysis of Attack Vectors on Smart Home Systems Book chapter, Security and Privacy in Internet of Things (IoTs), CRC Press / Taylor & Francis

• 2021–2022

  Engineering Manager

  RUAG AG

  Switzerland’s primary defense technology company

  Led seven engineers across Linux systems, distributed architecture, networking and cryptography. Architected a high-reliability decentralised defense networking platform — routing, switching and firewall components across distributed Linux nodes, in C++17, Python, SQLite on Debian. Built a package manager with dependency resolution and secure distribution for fielded infrastructure. Defined an ISO-90003-compatible development workflow that passed defense audit.

• 2018–2021

  Team Leader, Market Software

  Sensirion AG

  ETH Zürich spinoff; MEMS environmental sensors

  Led ~5 developers. Primary technical contact for sensor-SDK integration with mobile phone OEMs — face-to-face engineering across hardware and software. Owned live cloud operations (AWS, Azure, Kubernetes) for an internal measurement platform ingesting real-time sensor data.

• 2015–2018

  Software Developer & Scrum Master

  Sensirion AG

  Developed on-chip firmware for a proprietary ASIC sensor architecture, in assembly. Integrated sensor products into customer systems across mobile phones and embedded medical and automotive devices, including application development. Authored and upstreamed the SGP30/SGPC3 kernel driver. Built CI/CD and automated test infrastructure.

• HitchMatch

  OEM towing and payload specification database. iOS and Android.

  Shipped

• Word O’Clock

  A Bible verse matched to every minute of the day.

  Shipped

• Sentriq

  OBD-II vehicle health monitoring for tow rigs. In development.

  In development

• Daily Vow

  Scripture-grounded daily guidance for married couples. In development.

  In development