Embedded Software Developer for Cybersecurity

📍 Tallinn / Tartu, Estonia

Your main responsibilities will include

• Designing and building the module's onboard software for resource-constrained hardware under real-time constraints, incl. porting the proprietary algorithms to the target module and RTOS

• Designing and building the traffic interception and filtering data paths inside and below the OS network stack, and the bus drivers and protocol layers beneath it (CAN, MIL-STD-1553, SpaceWire, Ethernet, CCSDS added as the product grows), built to the Integrator's interface control documents

• Implementing fault tolerance as product behaviour

• Building the on-orbit update and configuration mechanism

• Applying standards-aligned development practices throughout: requirements traceability, design documentation, configuration management, formal code review, and static analysis

• Building and maintaining developer-side tooling and working directly with the OS and hardware vendors on BSP issues, driver defects, and performance problems

As a successful candidate, you must have

• 3+ years of production embedded software experience in C, C++, Ada, or Rust on resource-constrained hardware with real-time constraints

• Prior experience in a standards- and regulations-driven environment

• Real-time operating system experience used in earnest VxWorks, RTEMS, FreeRTOS, Zephyr, or an in-house RTOS

• A solid grounding in low-level networking device drivers, protocol stacks, and how data moves through them

• Fault tolerance and resilience design experience in safety-critical systems, watchdog architectures, graceful degradation, safe mode design, and recovery strategies

• Disciplined development practices: requirements traceability, configuration management, formal code review; static analysis and on-target unit testing are a plus

• Hardware fluency - comfort reading schematics and datasheets, using an oscilloscope and logic analyzer, debugging at the hardware-software boundary

• Comfort working day-to-day in a cross-functional product team alongside non-engineers

You will stand out by having any of the following:

• Direct experience with spacecraft or satellite software: flight software, onboard data handling, or ground segment integration in a real programme context

• Familiarity with the communication constraints of the space environment - intermittent contact windows, link budgets, data prioritisation under bandwidth limits, or CCSDS protocol knowledge

• A bus or network technology you have implemented or substantially modified yourself: CAN, MIL-STD-1553, SpaceWire, Ethernet, or similar

• Experience designing software update and configuration systems for deployments that cannot be patched on demand

• Real-time performance engineering on RTOS: ensuring deterministic, bounded worst-case execution (DMA, cache management, interrupt handling, memory management)

• Background in cybersecurity or security instrumentation or curiosity about the cybersecurity domain and willingness to grow into it is what matters

• Technical leadership or mentorship experience on embedded teams working in regulated environments

Why you'll enjoy working at Cybernetica?

We value an atmosphere of learning, collaboration and proactive problem solving, paying great attention also to work-life balance.