Matthias Wissen - Embedded Software Developer

Q: Where is Matthias based?

Matthias is based in Haar, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Matthias speak?

Matthias speaks the following languages: German (Native), English (Advanced), Italian (Intermediate) .

Q: How many years of experience does Matthias have?

Matthias has at least 12 years of experience. During this time, Matthias has worked in at least 5 different roles and for 10 different companies . The average length of individual experience is 1 year and 1 month . Note that Matthias may not have shared all experience and actually has more experience.

Q: What is Matthias's latest experience?

Matthias's most recent position is Embedded Software Developer at Schaffarzyk Hardware & Software .

Q: What companies has Matthias worked for in recent years?

In recent years, Matthias has worked for Schaffarzyk Hardware & Software , Nextgym GmbH , A pleasure project , Gasvisor GmbH , and Mirion MGPI H&B GmbH .

Q: Which industries is Matthias most experienced in?

Matthias is most experienced in industries like Manufacturing , Energy , and Utilities . Matthias also has some experience in Information Technology and Healthcare .

Q: Which business areas is Matthias most experienced in?

Matthias is most experienced in business areas like Product Development , Quality Assurance , and Production . Matthias also has some experience in Information Technology and Operations .

Q: Which industries has Matthias worked in recently?

Matthias has recently worked in industries like Energy , Manufacturing , and Utilities .

Q: Which business areas has Matthias worked in recently?

Matthias has recently worked in business areas like Product Development , Quality Assurance , and Information Technology .

Recommended expert

Haar, Germany

Experience

Jan 2026 - Present

3 months

Remote

Embedded Software Developer

Schaffarzyk Hardware & Software

Development of the embedded firmware for a smart wearable to capture vital signs with smartphone connectivity:

Architecture and implementation of the complete embedded firmware
Connecting and processing various sensors for vital data collection
Implementing BLE communication for the smartphone app
Optimizing power consumption and battery life for wearable operation
Technologies: BLE, Embedded C/C++, sensors, low-power design, Git, nRF52840, GCC, Azure

Aug 2025 - Present

8 months

Remote

Embedded Software Developer

Nextgym GmbH

Implementing the system logic in software
Integrating sensors and actuators for environmental monitoring and control
Improving energy efficiency and operational reliability
Technologies: ESP32, FreeRTOS, C/C++, Git, KiCad, MQTT

Feb 2025 - Present

1 year 2 months

Remote

Embedded Systems Developer

A pleasure project

Building various test systems and prototypes
Developing all hardware and firmware
Consulting on IoT technologies
Technologies: NXP LPC845, Azure RTOS, C++, Git, BMS, KiCad

Dec 2024 - May 2025

6 months

Remote

Embedded Systems Developer

Gasvisor GmbH

Developing additional prototypes
Implementing the embedded firmware
Technologies: nRF9151, Zephyr RTOS, C, Git, MQTT, IoT, LTE-M

Aug 2023 - Oct 2024

1 year 3 months

Remote

Embedded Systems Developer

Gasvisor GmbH

Creating and building the prototypes
Developing the embedded firmware
Optimizing power requirements
Providing technical consulting
Technologies: nRF9160, Zephyr RTOS, C, Git, MQTT, IoT, LTE-M

Sep 2020 - Oct 2025

5 years 2 months

Munich, Germany

Embedded Software Developer

Mirion MGPI H&B GmbH

Embedded software development in C/C++ and MISRA-C on bare metal and RTOS for various TI microcontrollers and Xilinx Zynq 7000 SoCs
Development and documentation according to functional safety standards (IEC 61508, IEC 61513, IEC 60880)
Development of PCBs for testing safety-critical components

Aug 2018 - Aug 2020

2 years 1 month

Feldkirchen-Westerham, Germany

Embedded Software Developer

Schraml GmbH

Embedded software development in C/C++ following Clean Code guidelines on Linux, Windows, and bare metal
Test-driven development with the Google Test unit testing framework
Code analysis using code coverage and Valgrind
Design and production of 3D-printed parts with FreeCAD

Oct 2015 - Aug 2016

11 months

Andernach, Germany

Working Student

Synthesizer Service Department, Inh. Achim Lenzgen

Maintenance and repair of high-end synthesizers

May 2015 - Jul 2018

3 years 3 months

Mülheim-Kärlich, Germany

Working Student

Laserline GmbH

Development of safety-critical shutdown devices according to DIN EN ISO 13849 on Lattice and Intel FPGAs in VHDL
Development of an EtherCAT gateway on a PIC microcontroller in C
Development of software for testing PCBs
Designing circuit schematics for various prototypes with Pulsonix
Repair and fabrication of PCBs with SMD components

Jul 2014 - Apr 2015

10 months

Assembler

SIH Arnold, Inh. Wolfgang Arnold

Assembly work

Jun 2013 - Sep 2013

4 months

Saffig, Germany

Administrative Clerk

Westnetz GmbH

Administrative tasks

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Manufacturing, Energy, Utilities, and Information Technology.

Manufacturing

Energy

Utilities

Information Technology

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Product Development, Quality Assurance, Production, Information Technology, and Operations.

Product Development

Quality Assurance

Production

Information Technology

Operations

Summary

I am a freelance embedded software developer with extensive experience in developing firmware, hardware prototypes, and IoT systems. My focus is on embedded C/C++, low-power design, RTOS-based systems, and the complete implementation of electronics projects.

In recent years, I have developed numerous IoT devices, wearables, and sensor systems for companies such as Gasvisor, Nextgym and Schaffarzyk Hardware & Software. My responsibilities include firmware architecture and hardware integration, as well as energy optimization, sensor connectivity or BLE communication. My industry experience with functionally safe systems (IEC 61508/60880) also provides me with in-depth expertise in robust and reliable system design.

I work across technologies with MCU platforms such as nRF52/nRF91, STM32, ESP32, TI, NXP MCUs and Zynq SoCs and utilize modern development environments like Zephyr, FreeRTOS, IAR, STM32CubeIDE or Git-based workflows.

I support companies in implementing complex embedded projects efficiently and reliably from prototypes to near-market products.

Languages

German

Native

English

Advanced

Italian

Intermediate

Education

Mar 2017 - Jul 2018

Hochschule Koblenz

Master's Program · System Engineering · Koblenz, Germany

Sep 2013 - Mar 2017

Hochschule Koblenz

Bachelor's Program · Electrical Engineering · Koblenz, Germany

Aug 2010 - Jun 2013

Westnetz GmbH

Training as Electronics Technician for Operational Technology · Electronics Technician for Operational Technology · Saffig, Germany

...and 1 more

Statistics

Experience

Total positions 11

Experience in Manufacturing 11.5 y

Avg length 1 y 5 m

Longest experience 5 y 1 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Embedded Software Developer, Embedded Systems Developer, Working Student

Main industries Manufacturing, Energy, Utilities

Main business areas Product Development, Quality Assurance, Production

Qualifications

Highest degree Master

Profile

Created

January 2026

Last Update

January 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Matthias based?

Matthias is based in Haar, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Matthias speak?

Matthias speaks the following languages: German (Native), English (Advanced), Italian (Intermediate).

How many years of experience does Matthias have?

Matthias has at least 12 years of experience. During this time, Matthias has worked in at least 5 different roles and for 10 different companies. The average length of individual experience is 1 year and 1 month. Note that Matthias may not have shared all experience and actually has more experience.

What roles would Matthias be best suited for?

Based on recent experience, Matthias would be well-suited for roles such as: Embedded Software Developer, Embedded Systems Developer, Working Student.

What is Matthias's latest experience?

Matthias's most recent position is Embedded Software Developer at Schaffarzyk Hardware & Software.

What companies has Matthias worked for in recent years?

In recent years, Matthias has worked for Schaffarzyk Hardware & Software, Nextgym GmbH, A pleasure project, Gasvisor GmbH, and Mirion MGPI H&B GmbH.

Which industries is Matthias most experienced in?

Matthias is most experienced in industries like Manufacturing, Energy, and Utilities. Matthias also has some experience in Information Technology and Healthcare.

Which business areas is Matthias most experienced in?

Matthias is most experienced in business areas like Product Development, Quality Assurance, and Production. Matthias also has some experience in Information Technology and Operations.

Which industries has Matthias worked in recently?

Matthias has recently worked in industries like Energy, Manufacturing, and Utilities.

Which business areas has Matthias worked in recently?

Matthias has recently worked in business areas like Product Development, Quality Assurance, and Information Technology.

What is Matthias's education?

Matthias holds a Master in System Engineering from Hochschule Koblenz and a Bachelor in Electrical Engineering from Hochschule Koblenz.

What is the availability of Matthias?

Matthias will be available full-time from March 2026.

What is the rate of Matthias?

Matthias's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.