About us

Bisly is a technology company on a mission to save our planet by making professional intelligent buildings mainstream, so we save energy and fight climate change through deployment of our digital twin-based building automation portfolio, consisting both of software systems and hardware products. We have achieved market leader position in our home market and are actively looking to replicate that in our target markets in Germany, UK and Nordics.

We are looking for a Firmware Engineer to join our team of dedicated professionals.

Your mission

As a Firmware Enginee r at Bisly, you will develop embedded software for our next-generation devices, including wireless and battery-powered devices — from compact sensors to advanced controllers. You’ll work closely with hardware (especially RF engineers) and product managers to bring smart building management features to life without the need for new cabling — enabling cutting-edge retrofits for older infrastructure. Your focus will be on implementing robust wireless communication stacks, optimizing firmware for low power consumption, and ensuring seamless integration with future and current hardware platforms.

Key Responsibilities

• Develop and maintain efficient firmware for wireless and wired embedded devices for building automation
• Define software requirements based on product and hardware requirements
• Collaborate with cloud and server engineers to make firmware features available from cloud and server environments
• Collaborate with product managers to specify new features or improvements to current features, write device firmware requirements and specifications
• Develop and maintain electronics production testing software and internal firmware development tools
• Design and implement unit tests and automated integration tests for firmware quality assurance
• Collaborate with other engineering disciplines to assure compliance with applicable standards and regulations
• Participate in code reviews and continuous improvement of coding practices and architecture
• Support debugging and troubleshooting across firmware, hardware, and system-level issues
• Contribute to lifecycle management of firmware, including over-the-air (OTA) update support and version control
• Document Bisly products in the form of datasheets, user manuals and application notes

To succeed in this role, you'll have

• 5+ years of experience in developing firmware for embedded devices (ARM Cortex-M or similar)
• Proven experience of developing firmware for wireless communication
• Familiarity with Rust, or strong interest and ability to adopt it rapidly
• Experience with modular architecture
• Proficient with git version control, familiar with CI/CD pipelines
• Good understanding of unit testing and test coverage
• Solid track record in low-power embedded system programming
• Experience with both RTOS and bare metal programming
• Fundamental understanding of electronics and hardware-software interaction
• Proficient with basic testing tools such as protocol analyzers, power profiling, oscilloscopes, DMMs, etc
• Strong interest in building automation

• Bonus points for : Previous experience with building automation devices, IoT devices, mesh networks, firmware automated testing, hands on prototyping and soldering skills

Why us?

• The chance to work on exciting projects and see your ideas come to life;
• Flexible vacation time with additional birthday leave for your personal 'me time' to relax, explore or spend time with loved ones;
• Book grant;
• Health & Wellness compensation via Stebby;
• Supportive work culture, with team-building events and activities.