Software developer - Linux Qt/C++-developer (m/f/d)

As part of the ELFIN Group, a medium-sized group of companies with around 160 employees in Germany, we offer interesting and challenging tasks in a dynamic high-tech environment and growing business. Our employees can develop their talents, develop further and make a valuable contribution to achieving our goals. In the heart of Cologne, we are passionate about developing various smart products for the elevator industry, digital signage, computer vision and building automation. With our products, we connect elevators to the building network and the cloud, guide people through the building and improve elevator safety and emergency call communication for people with disabilities. We are constantly developing the hardware and software of our smart gateways and networked multimedia displays and are happy to show courage in our pursuit of technical innovations. This is how we became the technological market leader in this segment. We would like to further expand this technological lead and are therefore looking for someone to join our team who, like us, enjoys developing smart systems and the latest technologies.

For the maintenance and further development of our networked display systems, we are looking for an experienced person for our location in Cologne:

Software developer – Linux Qt/C++-developer (m/f/d)

What you’ll do:

With us, you will develop software for networked embedded displays on a multi-core basis, gateways, sensors and actuators. From the GUI to software libraries to driver development, you will be involved in the development and specialise after the induction. Your possible areas of responsibility will be:

  • GUI development in Qt
  • Network programming with Boost.Asio
  • Multimedia processing with GStreamer
  • Adaptation of bootloader and Linux drivers in C and C++
  • Configuration and customization of embedded Linux systems
Key Qualifications:
  • Degree in computer science or comparable training with professional experience

  • Several years of experience in C++ software development for embedded Linux devices

  • Experience as an independent, team-oriented software developer, from specification to release

  • A very good understanding of the architecture of Linux systems

  • Familiar with Qt, Boost or similar frameworks

  • Familiar with version management (Git, etc.)

  • Able to handle build tools such as Autotools, CMake or qmake

  • Good knowledge of English

Preferred Qualifications:
  • Knowledge of the build process of Linux software systems (ideally Yocto)
  • Skills in developing IoT devices and systems
  • Experience with networks based on CAN or RS-485
  • Familiarisation with the job-specific environment
  • Flexible working hours and a warm corporate culture without a brute force mentality
  • Exciting and dynamic projects
  • A creative environment for the personal development of your strengths: The development of creativity and result-oriented work is more important to us than rigid rules and specifications
  • Attractive home office regulation: You are welcome to work at our main location in Cologne between the two crane houses, from home or sometimes on the beach in the south
  • Family team: We are always happy about a joint visit to the nearby Südstadt after work
  • High level of personal responsibility in an extensive project landscape
  • Subsidy for the JobTicket

You can start with us right away!

If you would like to tackle new technologies in a dynamic team and are not afraid of creating something that has never existed before, then please send your detailed application documents to If you have any questions, we are at your disposal.

We’re looking forward to receiving your applicat

The ELFIN technology Team

Our team is characterized by its motivated employees and the family atmosphere. Team spirit is very important to us! Visit our team page and get to know us.

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