Firmware Engineer

Permanent employee, Full-time · Tallinn

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 Engineer 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?

At Bisly, we value talent, innovation and collaboration. Here’s what you can expect when you join our team:

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.

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We are looking forward to hearing from you!

Thank you for your interest in Bisly! Please fill out the following short form.