We are seeking an experienced Firmware Security Engineer with strong expertise in embedded firmware development, security, networking, and Linux-based systems. The ideal candidate will design, develop, test, and integrate secure firmware components for embedded devices while working closely with cross-functional engineering teams. Experience with C/C++, Python, Embedded Linux, security protocols, networking, debugging tools, and firmware validation is highly preferred.
Strong experience in Embedded Firmware Development and Software Engineering.
Hands-on experience with C, C++ (11/14), Python, and TCL programming languages.
Strong understanding of firmware architecture, software design patterns, and scalable embedded software design .
Hands-on experience with APIs and secure web services .
Good knowledge of Assembly (when required), RTOS concepts, and embedded systems development .
Strong experience working in Linux (embedded and development environments), Windows, and macOS .
Experience with Git/GitHub version control systems.
Experience with unit testing frameworks (GTest/GMock) .




Experience using Make, CMake , and Jenkins or similar CI/CD tools .
Familiarity with GCC ARM toolchains, package managers (apt, pip), and Docker-based development environments .
Experience implementing TLS/SSL, OpenSSL, PKI, certificate management, and secure communication protocols .
Experience using Wireshark for networking analysis, packet capture, and protocol debugging.
Hands-on experience with Yocto for Embedded Linux image customization and layer integration.
Experience with firmware testing, validation, bug fixing, system integration, and prototype support .
Ability to analyze software changes, resolve manufacturing and prototype issues, and collaborate with firmware, software, and hardware engineering teams.
Fluent English is required; Ascendion is a general, leading provider of AI-first software engineering services, delivering transformative solutions across North America, APAC,

📌 Firmware Engineer (Barcelona)
🏢 Ascendion
📍 Barcelona