[Permanent position] Linux Kernel Engineer, Maisons-Laffitte

About SiPearl SiPearl is the European fabless designer of sovereign

secure high-performance

energy‑efficient CPUs for HPC, AI and data centres. These CPUs will help address strategic challenges in the fields of security, defence, medical research, energy, climate and engineering with a reduced environmental footprint.

In June 25, SiPearl completed the design of the most complex CPU ever designed in Europe, Rhea1. Featuring 80 Arm Neoverse V1 cores, with 61 billion transistors, it is currently in production at TSMC. SiPearl CPUs will equip the two first European exascale supercomputers belonging to EuroHPC JU: Rhea1 will be integrated into the JUPITER machine based in Germany and Rhea2 will be part of Alice Recoque in France.

Incubated within the European Processor Initiative (EPI) Consortium and seed‑funded by the European Union, SiPearl employs almost 200 people in the following locations:

France (Maisons‑Laffitte, Grenoble, Massy, Sophia Antipolis)

Spain (Barcelona)

Italy (Bologna)

Following a€130 million Series A, the company has launched its Series B round.

About the role In this role, you will be responsible for ensuring the reliability and proper functioning of Linux kernels and distributions for Rhea processors.

Working closely with the Linux kernel team, you will define and coordinate testing strategies across multiple hardware interfaces, contribute to kernel integration and validation, and actively participate in collaborative and partner‑driven projects to support the broader ecosystem.

Your missions

Analyze system and product documentation to design and improve Linux kernel features for SiPearl processors and platforms

Draft kernel specifications, testing plans and implement innovative kernel functionalities

Test, validate and integrate kernel changes into the ecosystem, including open-source contributions when applicable

Investigate and resolve critical software issues, contributing fixes to standard Linux distributions

Collaborate on partnership and collaborative projects, contributing to development, porting, validation and delivery

Perform technology intelligence on Linux kernels and modules, sharing insights with internal teams

Mentor and supervise trainees, contributing to onboarding and academic partnerships

Maintain, update and upgrade our internal Yocto layer by adding new recipe or moving to a newer Poky version

What Would Make You Succeed In This Role

Strong expertise in Linux kernel development and low‑level software (C/C++)

Solid understanding of hardware/OS interactions and system architecture

Experience with CI environments and version control (Git, GitLab, Polarion or similar)

Proficiency in Linux development tools, Yocto, CLI environments and scripting (Bash, Python)

Ability to analyze complex problems and deliver robust solutions

Professional fluency in English in an international environment

High level of autonomy, rigor and reliability, with a strong team mindset

Engineering degree (or equivalent) and 5–7 years of relevant experience

Recruitment process

Discovery interview with our Talent Acquisition Partner (30 min)

AssessFirst personality test– no need to worry, there is no wrong or right answer; our goal is to see beyond your resume (45')

2 Technical interviews (1 h each)

Interview with one HRBP in order to answer your last questions (30 min)

Benefits And Conditions

Contract: Permanent Contract

Benefits: annual bonus*; meal vouchers (60% covered by SiPearl); health insurance (70% covered by SiPearl); unlimited access and pre‑paid sessions with a practitioner of your choice on our mental health partner app, moka.care; technical, linguistic and personal development training; BSPCE

Work model: On‑Site or Hybrid (2 days/week remote)

Office: This role is open for our locations in France (Maisons‑Laffitte, Massy, Grenoble), Spain (Castelldelfels – Barcelona), Italy (Bologna)

⚠️ Please note that while we do not provide VISA Sponsorship, we are committed to assisting international candidates with the visa application process to the best of our ability.

Are you curious to learn more about us?

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Get updated about our recruiting activities: Sipearl careers webpage

Get to know a bit more about our team culture: Welcome to the jungle

At SiPearl, we are dedicated to building a diverse and inclusive workplace that thrives on the strength of varied perspectives and backgrounds. We recruit talent based on merit, experience, and alignment with our company's goals and values.

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