Senior Embedded Software Engineer | Senior Firmware Engineer (m/f/x)

Last Mile Semiconductor GmbH, a Dresden-based deep-tech startup, is developing the next generation of energy-efficient wireless connectivity solutions based on the new DECT NR+ standard. As a pioneer in the field of ultra-low-power RFICs and SoCs, we are shaping the future of IoT, Industry 4.0, and Massive Machine-Type Communication (mMTC). Our chips are based on state-of-the-art CMOS and FD-SOI technologies and are used worldwide for scalable, robust, and cost-effective applications.

Your Responsibilities:

• Development, implementation, and optimization of embedded software and firmware for our DECT NR+ microchip
• Specifying, designing, and further developing software architectures in C/C++ for resource-constrained, hardware-proximate systems
• Development of drivers, applications, and system components for microcontrollers and real-time operating systems such as FreeRTOS, Mbed OS, or Zephyr
• Implementation and integration of microcontroller peripherals and serial interfaces such as SPI, I2C, UART, timers, ADC, and DAC
• Development and evaluation of solutions for multi-core communication, synchronization, and interrupt handling
• Close collaboration with hardware and systems engineers in the development and integration of holistic solutions
• Creation of test requirements and test cases, as well as conducting tests, debugging, and performance analyses
• Systematic analysis and resolution of technical issues throughout the entire development cycle
• Documentation and maintenance of the software architecture, as well as continuous improvement of existing systems
• Active involvement from conception through integration and validation to market launch and implementation of customer-specific software solutions

Technical Environment:

• Embedded software, firmware, and hardware-oriented C/C++ development
• DECT NR+ and energy-efficient wireless connectivity solutions
• Real-time operating systems, in particular FreeRTOS, Mbed OS, and Zephyr
• Microcontroller peripherals, interrupts, timers, ADC/DAC, and multi-core communication
• Serial bus systems and interfaces such as SPI, I2C, UART, CAN, and RS485
• Secure boot, fail-safe bootloaders, and embedded security as potential development focuses
• Git, GitLab/GitHub, JIRA, and CI/CD-based development processes
• CMOS and FD-SOI technologies, including 22FDX
• Interfaces between ASIC, firmware, PCB, and system software

Your Profile:

• Bachelor’s or master’s degree in computer science, electrical engineering, or a comparable field
• At least 5 years of relevant professional experience in the development of embedded software or firmware
• Solid and demonstrable programming skills in C/C++ with a technical understanding equivalent to senior level
• Experience in the specification, architecture, and design of hardware-close software for microcontrollers
• Solid understanding of program execution, memory layout, the stack, registers, interrupts, compilers, linkers, and linker scripts
• Practical experience with real-time operating systems and the fundamentals of tasks, scheduling, and context and task switches
• Good knowledge of low-level interfaces such as SPI, I2C, or UART, as well as microcontroller peripherals and multi-core communication
• Experience with at least one modern communication standard such as Bluetooth, LTE, or Wi-Fi, as well as a clear understanding of the technical interrelationships
• Proficiency with Git, GitLab/GitHub, JIRA, and CI/CD; knowledge of Python is a plus
• Self-motivation, methodical problem-solving, clear communication, and enthusiasm for embedded technologies and working in a deep-tech startup

Nice-to-Have:

• • Experience with FreeRTOS, Mbed OS, or Zephyr; particularly with porting or deeper integration of an RTOS
  • Proficiency with CAN, RS485, (Q)SPI, or other bus systems
  • Experience with Secure Boot, fail-safe bootloaders, or securing embedded devices
  • Knowledge of Zephyr configuration, the device tree, and relevant Zephyr macros
  • Experience with RISC-V, functional verification, instruction sets, or debug modules
  • Understanding of the PHY and MAC layers of modern wireless standards
  • Knowledge of OFDM, FFT, modulation, ENOB, image rejection, or random-access methods

We offer:

Creative freedom & responsibility

• Ample creative freedom and genuine ownership instead of micromanagement
• Short decision-making processes and direct influence on technical and strategic decisions
• A tangible contribution to the success of our product and our company
• The opportunity to play a key role in a growing deep-tech company
• Contributing to a technology that can transform the future of energy-efficient wireless communication

Benefits

• Employer contribution toward the Deutschlandticket or DVB Jobticket in the amount of €55.10 per month
• Alternatively, an employer contribution of €54.90 per month toward the JobRad
• Unlimited free access to the gym located right in the building
• Company retirement plan with a €100 employer contribution per month

Flexibility & Work Environment

• Flexible work hours with core hours from 10:00 a.m. to 3:00 p.m.
• Hybrid work with up to 2 days of remote work per week; additional remote work by individual arrangement
• Modern hardware and professional work tools
• Bright, modern office spaces in a central location in Dresden-Plauen
• Ergonomically equipped workstations

Team & Culture

• An international team with flat hierarchies and short lines of communication
• Direct interaction with management and technical decision-makers
• Colleagues who support one another and share knowledge
• Lunch breaks together and regular team events
• A corporate culture in which initiative and new ideas are actively encouraged