❓ 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 :

• France (Maisons-Laffitte, Grenoble, Massy, Sophia Antipolis),

• Spain (Barcelona)

• and Italy (Bologna)

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

💻 About the role

In this role, you will work closely with the Architecture Team Leader to define, document and drive system architecture for cutting-edge HPC systems, while contributing to collaborative projects with industrial and academic partners.

🎯 Your missions

• Define and structure the integration framework for SiPearl microprocessors, including use cases, hardware and software interfaces, and lifecycle compliance management

• Lead architectural engagements with partners and customers to design optimized HPC nodes based on one or multiple SiPearl processors

• Develop integration, performance measurement, benchmarking, and optimization tools to ensure processing efficiency and energy performance across the product lifecycle

• Contribute actively to collaborative projects, technical deliverables, technology watch activities, and partner workshops

• Support customers in migrating their applications toward new system architectures integrating SiPearl microprocessors

• Mentor interns and contribute to recruitment and knowledge-sharing initiatives within the team

🔍 What will help you succeed in this role

• Strong expertise in system and software architecture, particularly in HPC environments (multi-core architectures, mesh networks, low latency and high bandwidth interfaces, benchmarking and troubleshooting)

• Solid experience with microprocessor hardware and software interfaces (SPI, I2C, DDR, HBM, PCIe) and server management protocols (RedFish, IPMI, PSCI, SCMI, PLDM)

• Proficiency in C/C++ and other relevant programming languages, with strong Linux and Windows development experience and ARM programming knowledge

• Proven ability to define proof of concepts, analyze data flows and bandwidth requirements, and deliver architecture recommendations balancing performance and energy efficiency

• Strong debugging skills across multiple subsystems and the ability to identify root causes and resolve complex integration issues

• Familiarity with development tools such as GitLab, Polarion, and PlantUML

• Scientific rigor, structured thinking, and strong synthesis capabilities

• Leadership mindset, proactive risk management, and the ability to work effectively in cross-functional and international environments

➕ Experience in the following areas is a plus

• Embedded systems constraints and security

• HPC system benchmarking, performance optimization, and large-scale system integration

• Participation in collaborative R&D projects and technical reporting

• Technical mentoring, workshop facilitation, and cross-organizational architectural governance

• Minimum 7 years of experience as a System Architect or Software Architect

• Proven experience in HPC environments, including multi-core architectures, mesh interconnects, low-latency systems, high-bandwidth interfaces, benchmarking, troubleshooting, security, and system integration

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 (1h each)

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

💡 Benefits and conditions

• Contract: Permanent Contract (CDI)

• Benefits: annual bonus*; meal vouchers (60% covered by SiPearl); health insurance (70% covered by SiPearl); illimited 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 and Sophia Antipolis), Spain (Castelldelfels - Barcelona)

• ⚠️ 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?

• Follow us on LinkedIn to stay updated with our latest news

• 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.