About Us

We are a French company specializing in the development and operation of critical computing infrastructures, with a focus on hyperdense data centers dedicated to artificial intelligence. 

Sesterce was built on a clear conviction: Europe needs sovereign, high-performance, and decarbonized AI infrastructure. In full growth mode, our mission is to design, build, and operate next-generation computing campuses across France and internationally. Our solutions power the most demanding AI workloads for leading clients in the industry.

To strengthen our Technical team, we are looking for an expert, client-focused, and innovative Senior Solution Architect.

Your Responsibilities

Architecture Design

• Design scalable and resilient AI & HPC architectures (GPU clusters from 100 to 15,000+ GPUs)
• Define technical infrastructure blueprints and reference architectures
• Design InfiniBand NDR/HDR and high-speed Ethernet network topologies
• Specify storage solutions (NVMe, parallel filesystems: GPFS, Lustre, WekaFS)

Client Engagement & Pre-Sales

• Assist clients in defining infrastructure needs through technical workshops and discovery sessions
• Produce technical proposals, RFP responses, and proof-of-concept plans
• Present architectures to C-level and technical decision-makers

Deployment & Integration

• Lead or oversee deployment of AI & HPC clusters
• Coordinate commissioning with DC operations teams
• Validate performance benchmarks (MLPerf, HPL, STREAM)

Technology Watch

• Maintain expert-level knowledge of AI/HPC/datacenter trends
• Evaluate new GPU generations (H100, B200, GB200 NVL72) and interconnect technologies
• Provide internal training and knowledge sharing

Your Profile

Education & Experience

• Master's degree in computer science, networks, or engineering
• 5+ years in HPC, AI infrastructure, or solution architecture

Technical Skills

• Deep expertise: GPU computing (NVIDIA H100/B200/GB200), InfiniBand (NDR/HDR), NVMe, RDMA

• Proficiency: TensorFlow, PyTorch, CUDA, MPI, OpenMP, container orchestration (Docker, Kubernetes, Slurm)

• Knowledge of network topologies (fat-tree, dragonfly) and parallel filesystems

Personal Qualities

• Excellent presentation skills; ability to translate technical complexity into business value
• Autonomous, curious, and rigorous with a strong client-facing mindset

Languages

• English: fluent required
• French: a plus

Why Join Us?

• Design the AI infrastructure architectures that will define the next decade of computing
• Work with the most advanced GPU hardware on the market: H100, B200, GB200 NVL72
• Engage directly with leading AI labs, hyperscalers, and enterprise clients
• Shape the technical roadmap of one of Europe's most ambitious AI infrastructure companies
• Competitive package: salary based on profile, health insurance, transportation

How to Apply

• Send your application (resume + cover letter) to: hr@sesterce.com
• Please use the reference "SOL-ARCH-MRS" in the subject line of your email.