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

With Ascendion ( 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 (Barcelona)
🏢 Ascendion
📍 Barcelona