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RSI Europe

Firmware Developer

RSI Europe
Lithuania · Full-time · Mid-Senior

RSI Europe is a rapidly growing defense technology company based in Vilnius, Lithuania, developing and producing advanced remotely operated systems for modern military operations. Our mission is to empower armed forces with reliable, innovative, and field-proven solutions that enhance operational efficiency and safety.


Responsibilities:

  • Design, develop, and maintain embedded firmware for remote initiation and UAV systems.
  • Work with Arm Cortex-M and Xtensa based microcontrollers, running various RTOSes including Zephyr and FreeRTOS.
  • Participate in code architecture, design and review processes.
  • Collaborate with cross-functional teams to ensure seamless hardware/software integration.
  • Conduct thorough testing, system validation and debugging using tools such as oscilloscopes, spectrum analyzers, logic analyzers, and in-circuit debuggers.
  • Implement firmware-level security features including encryption, secure boot, and tamper detection.
  • Provide technical support for firmware-related issues during system testing, trials, manufacturing, and field deployment.
  • Follow industry trends and new technologies to contribute to the continuous improvement of our products.


Requirements:

  • Bachelor's degree in software engineering, Electronic Engineering or related field.
  • 3–5 years of hands-on experience in embedded firmware development.
  • Thorough understanding of the C programming language.
  • Experience with Arm Cortex-M or Xtensa based microcontrollers.
  • Strong understanding of embedded systems, microcontroller architecture, and hardware debugging.
  • Ability to read and interpret electrical schematics. Provide constructive feedback.
  • Strong problem-solving skills and attention to detail.
  • Excellent communication and collaboration skills.
  • Knowledge of defense and security industry standards would be advantageous.


Bonus skills:

  • Knowledge of modern C++, including latest standards (C++20 and onwards), with a focus on its application in embedded systems.
  • Experience with Python programming language.
  • Working knowledge of any embedded RTOS. Zephyr or FreeRTOS is preferred.
  • Hands-on experience with development tools, documentation and toolchains for microcontrollers from STMicroelectronics, Espressif, or Nordic.
  • Experience with automating development processes using modern CI/CD practices.
  • Strong familiarity with code-quality tools, including static analysers, linters, formatters, and similar tooling.


We offer:

  • Unique opportunity to join a high growth company in the scaling stage.
  • Opportunity to help Ukraine win.
  • Flexible work hours.
  • Frequent team-building events, free parking, pet-friendly office and private health insurance after the probation period and of course the best and supporting team.
  • Result based bonuses.
  • Competitive salary ranges from 4000 Eur (gross). The final offer will depend on your qualifications, competencies, and professional experience.

Key Skills

Ranked by relevance

embedded c embedded systems freertos python rtos cicd
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Posted
Feb 04, 2026
Type
Full-time
Level
Mid-Senior
Location
Vilnius
Company
RSI Europe

Industries

Defense Space Manufacturing

Categories

Information Technology

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