Firmware Engineer (m/f/d)

## Your Role We're not just looking for someone who can write lines of code; we're seeking an individual who can think beyond code and question the "why" and "how" behind our software engineering processes while understanding the importance of our connection to our customers. As a Firmware Engineer (m/f/d) at STABL Energy, you will drive innovation, solve complex challenges, and contribute to the success of our groundbreaking projects. ## Your mission * Design, implement, and test firmware for our cutting-edge power electronics products. * Continue to implement new ways of assuring firmware quality. * Collaborate with cross-functional teams to define project requirements and objectives, with a keen focus on meeting and exceeding customer expectations. * Evaluate and optimize existing firmware code to enhance performance, reliability, and efficiency. * Mentor and guide junior engineers, fostering a culture of continuous learning and improvement. * Promote best practices in software engineering, emphasizing the importance of a holistic approach beyond just coding and its direct impact on customer satisfaction. ## Your profile * 4+ years of experience in firmware development for power electronics or other embedded systems. * Comprehensive skills in the C programming language, in particular for embedded devices. * Expertise on guiding firmware projects to professional standards. * Strong problem-solving skills and the ability to think critically about software design and architecture. * Proven ability to design and maintain robust firmware development ecosystems, including build infrastructure, modular frameworks, testing pipelines, and scalable release processes. * Excellent English communication skills, with the ability to collaborate effectively with cross-functional teams and translate customer needs into technical solutions. * You have interest and experience with a few of the following: * Real-time operating systems (RTOS). * Communication protocols such as SPI, UART, and CAN. * Microcontroller architectures. * Continuous integration (CI). * Testing strategies. * Product releases and versioning. * Build systems (e.g.make,CMake). ## Why STABL Energy? STABL Energy is one of the most innovative start-ups in the energy transition, **ees Award winner 2022**, **pv magazine award winner 2025** and named a **global Top100 Energy Start-up**. We are funded by renowned and experienced Tech VCs from Germany, Denmark and Switzerland. What you’ll love about working with us: * Agile, open & innovation-driven culture with flat hierarchies, quick decision-making processes and real ownership * Company pension scheme to support you plan for the future * Flexible working hours, a hybrid work model, and the option to work remotely from abroad * Digital meal vouchers with Circula Lunch - enjoy tasty lunches on us! * Monthly benefit in kind to spend at your favourite stores * Corporate benefits portal with exclusive employee discounts * Regular team-building activities and team events * Company EGYM Wellpass membership to train with no limits at numerous fitness clubs across Germany **Ready to innovate, impact, and inspire? Apply Now!** We’d love to hear from you to help us build the energy system of the future! Even if you don’t meet 100% of the requirements, we encourage you to apply anyway. Our motto is 'Hire for attitude, train for skills', so we value potential and lifelong learning just as much as experience.