2023 - 2024 Telecommunications: Linux base system
* Debian base system for custom boards
* ARM (LS10xx), Ethernet, eMMC
* C, U-Boot, Linux kernel 5.10 ? 6.1, drivers, Yocto, Isar, swupdate, signing,
system software, developer coaching

2022 - 2024 Industry: Linux base system
* Debian base system for custom boards
* ARM (AM64x), Ethernet, PHY, SD, eMMC, NVRAM, GPIO
* C, U-Boot, Linux kernel 5.10 ? 6.1, Yocto, Isar, drivers, swupdate, signing,
Isar training, product architecture consulting
* Hardware bring-up and debugging (oscilloscope, logic analyzer, circuit
modifications), Azure

2020 ? 2023 Telecommunications: Linux kernel development
* Linux base system for several boards
* MIPS, ARM (TI, Intel, Marvell), x86-64 (Intel), Ethernet, WiFi
* C, U-Boot, Linux kernel 4.19 ? 6.1, about 2200 patches from different
vendors, drivers, system software, Yocto, watchdog, postmortem debugging, new
SoC debugging using TF-A
* Jenkins

2020 ? 2022 Industry: Board Support Package
* Board support package (BSP) for custom boards
* ARM (i.MX6, i.MX8)
* C, C++, Linux kernel 5.4, etnaviv, Yocto, Isar, Mesa, Qt 5.x, EGLFS, Qt
WebEngine, display, touch screen

2019 - 2022 Industry: Board Support Package
* Board support packages (BSP) for custom boards using Isar and Yocto
* ARM (i.MX6), x86
* C, C++, Linux kernel 4.19, etnaviv, Yocto, Isar, drivers, Mesa, Qt 5.12,
EGLFS, Qt WebEngine, display, touch screen, RAUC

2016 ? 2018 Railway: Ticketing system
* Linux base system for a ticketing machine
* ARM (i.MX6)
* Hardware debugging (DRAM stability, MTD), Linux porting, driver development,
Yocto, C, C++, Qt, WiFi, Bluetooth, GSM, GPS, CAN, gyroscope, SPI, GPIO, PIC,
U-Boot, software update, firmware update, watchdog, overheating handling,
security hardening

2015 - 2024: Industry: Isar build system
* System for building complete firmware images based on Debian
* x86-64, ARM, x86, MIPS, RISC-V
* Linux, U-Boot, Debian packaging, Yocto recipes, automated testing
* Jenkins, GitLab

2012 - 2024 Railway: Vehicle Control Base System
* Base system for application development
* PowerPC (MPC55xx), ARM (LS10xx), Ethernet, PHY, CAN, serial, USB, MMU

* C (WindRiver Diab, gcc), assembly, Sevenstax TCP/IP, Ethernet driver, PHY
driver, PPP, MMU programming, protocols (FTP, IGMP, Modbus, proprietary), OS
abstraction layer, messaging subsystem, Sciopta real-time kernel, U-Boot,
PikeOS hypervisor, test automation in Python, freedom from interference
solutions
* MISRA, EN 50128 SIL 3, freedom from interference analysis, safety
certification documentation

2014 Industry: Real-Time Android

* Real-time capabilities for Android
* Google Nexus 10 tablet, ARM
* Android, PREEMPT-RT, driver debugging, performance measurements, latency
debugging

2012 ? 2016: Automotive: Vehicle infotainment system
* Linux base system and application
* ARM (i.MX6)
* Hardware debugging (DRAM, DVD), Linux porting, video decoder driver, audio
DAC / ADC driver, I²C slave driver, U-Boot flash driver performance
optimization (2x speed increase), Yocto, proprietary RTOS, C, C++, radio, TV
(DVB-T driver), DVD playback, camera, touch screen, on-screen display,
U-Boot, logging, watchdog concept and implementation in Linux and proprietary
RTOS according to automotive standards, high-resolution timer analysis, debug
memory corruption in multi-threaded application

2011 Industry: Upgrade Linux VM
* Debian 6.0, desktop performance optimization, OpenEmbedded upgrade to
2010.12, overlay maintenance, documentation

2010 ? 2011 Industry: Protocol gateway
* Linux base system for a protocol gateway
* PowerPC (MPC8xx)
* Linux, Yocto, hardware debugging (flash, USB), Ethernet, SPI, UART, USB OTG,
open-source license clearing
* git, ClearCase

2009 ? 2015 Industry: Fire alarm and intrusion detection system
* Existing system porting from legacy programming language and in-house OS to
Linux
* ARM (PXA255)
* Hardware debugging (SPI, PCI), Linux driver and application development,
Debian packaging, C, C++, hardware control over SPI, GPIO and proprietary
buses (CPLD), proprietary boot loader, U-Boot, software update, watchdog,
autotools, flex, bison, ACE, build system, Scrum
* EN 54, UL 864, safety certification documentation, security assessment and
implementation, open-source license clearing
* git, CVS, Subversion

2009 - 2011 Industry: Embedded Linux distribution
* Board support packages for several boards
* ARM (AT91), PowerPC (MPC8xx, MPC82xx)
* Kernel porting, Linux drivers, U-Boot development, test concept and
implementation, hardware debugging

2007 - 2011 Industry: Distributed fire evacuation system
* Voice evacuation system, doubling the capacity, audio sync
* C166, CAN, C++ (Tasking, gcc), OSE real-time kernel, test automation in
Python, ASN.1, UML, autotools, Rational Rose, PVCS, Subversion, Eclipse, MSYS
/ MinGW, SNiFF+, Windows, Linux, Scrum
* EN 54, UL 864

2005 Telecommunications: AES128 block cipher
* Custom cipher integraton into a phone switch application
* MIPS
* Linux, OpenSSL, C, make, ClearCase

2003 - 2004 Medical: MRI
* Linux base system for an MRI device
* x86 (AMD)

* Linux boot and installation system for Windows, DHCP option implementation

according to RFC 2131, upstreaming open-source fixes (gdb, bootlogd),

filesystem performance evaluation, cross-toolchain bootstrapping and
regression testing, open-source licensing
* C, C++, SUSE Enterprise Server, Hummingbird NFS server, CVS, cygwin

2003 Telecommunications: Security suite
* Security suite for a gateway
* x86
* Linux, RPM packaging, C, C++, Java, authentication, GUI, web interface

2003 Telecommunications: Message routing
* MMS routing between mobile networks and Internet
* SMTP routing
* Sendmail configuration

2002 Telecommunications: Billing system
* SCO Unix server
* Application (COBOL)
* Test and verification on a cloned system
* Implementation on a live system

2001 Retail: Centralized accounting
* VoIP design, implementation, troubleshooting
* Motorola routers
* Citrix Application Server

2001 Military: Highly-available ERP System
* Sun Enterprise Servers
* Oracle Database Server
* Oracle Application Server
* Veritas Cluster Server
* Veritas Volume Manager
* Solstice Backup