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. Key Requirements

Strong experience in

Embedded Firmware Development

and Software Engineering. Hands-on experience with

C, C++ (11/14), Python, and TCL

programming languages. Experience with

concurrent programming, multithreaded, and multi-process systems . Strong understanding of

firmware architecture, software design patterns, and scalable embedded software design . Hands-on experience with

HTTP/REST 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. Hands-on debugging experience using

JTAG, GDB, logic analyzers, oscilloscopes, and memory debugging tools . 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 . Strong understanding of

authentication and authorization technologies including Kerberos, SASL, and LDAP . Experience implementing

TLS/SSL, OpenSSL, PKI, certificate management, and secure communication protocols . Knowledge of

HTTPS, Secure REST APIs,



and embedded security best practices . 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. Excellent problem-solving, debugging, and analytical skills. Strong communication, documentation, and stakeholder collaboration skills. Fluent English

is required; additional European languages are a plus. About Us:

Ascendion is a integral, leading provider of AI-first software engineering services, delivering transformative solutions across North America, APAC, and Europe. We are headquartered in New Jersey. We combine technology and talent to deliver tech debt relief, improve engineering productivity solutions, and accelerate time to value, driving our clients' digital journeys with efficiency and velocity. Guided by our "Engineering to the power of AI" [EngineeringAI] methodology, we integrate AI into software engineering, enterprise operations, and talent orchestration, to address critical challenges of trust, speed, and capital. For more information, please go to www.ascendion.com With Ascendion (www.ascendion.com), you: Will get to work on numerous challenging and exciting projects on our various offerings including Salesforce, AI/Data Science, Generative AI/ML, Automation, Cloud Enterprise and Product/Platform Engineering. At Ascendion you have high chances of project extension or redeployment to other clients. Additionally, you can also share CV of anyone you know. We have a referral policy in place.

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📌 Firmware Engineer (Madrid)
🏢 Ascendion
📍 Madrid