About Sesterce
Sesterce is a French company specializing in the development and operation of critical computing infrastructure, dedicated to hyper-dense data centers for artificial intelligence. Founded by Youssef El Manssouri (CEO) and Anthony Tchakerian (Chairman), the company develops, builds, and operates next-generation computing campuses across France and internationally.
In a context of accelerated growth, we are looking for a Data Center Technician in Madrid to strengthen our Infrastructure team and ensure the daily operation of our facilities.
Mission
At the heart of our physical infrastructure, the Data Center Technician ensures the proper functioning, monitoring, and maintenance of equipment hosted in our data centers. They guarantee the availability, physical security, and performance of the critical infrastructure powering our clients' AI workloads.
Main responsibilities
Operations & Monitoring
- Ensure real-time monitoring of equipment (servers, networks, power supplies, cooling)
- Respond to incidents and alerts, perform first-level diagnostics, and escalate anomalies
- Guarantee service continuity and compliance with customer SLAs
- Carry out on-call duties according to the schedule in place
Maintenance & Physical Interventions
- Perform preventive and corrective maintenance on physical equipment
- Carry out rack & stack operations (installation, cabling, equipment replacement)
- Manage intervention tickets (ITSM): tracking, updating, resolving, RMA
- Experience with MPO fiber cabling
Capacity Management & Asset Management
- Maintain up-to-date physical asset inventories (CMDB)
- Manage logistics for equipment deliveries and shipments
- Contribute to tracking power density and capacity of racks
Security & Compliance
- Contribute to writing and updating operational documentation (runbooks, procedures)
- Participate in internal audits and BCP/DRP drills
Required profile
Education & Experience
- Associate degree or equivalent (BTS SIO, CCNA, or similar) in IT, networking, or electrical engineering
- Minimum 2 years of experience in a data center or server room environment
- Experience in a carrier-neutral or hyperscale data center is a plus
Technical Skills
- Strong command of physical infrastructures: servers, switches, racks, PDUs, UPSs
- Familiarity with monitoring tools (Grafana, ticketing systems)
- Basic knowledge of networking (VLAN, optical fiber, structured cabling)
- Proficiency in Linux command line is an advantage
Personal Skills
- Rigor, structured methodology, and sense of priority in a high-stakes environment
- Autonomy and ability to take initiative during incidents
- Excellent written and oral communication skills, passion for documentation
- Team player with ability to collaborate with multidisciplinary technical teams
- Availability for on-call duties and interventions outside regular hours
- Mobility, travel capability
Languages
- English / Spanish
What Sesterce offers
- A strategic role at the core of AI infrastructures shaping French digital sovereignty
- A cutting-edge technical environment: next-generation high-density data centers, GPU workloads
- A human-sized, demanding, and passionate team where every contribution matters
- Fast-track career growth perspectives in a rapidly growing company
- Competitive package: salary based on profile, health insurance, transportation reimbursement
Key information
- Company: Sesterce SAS
- Contract type: Permanent Contract — Full-time
- Location: Madrid, Spain (travel possible)
- Department: Infrastructure / Operations
- Reports to: Head of Infrastructure
- Start date: As soon as possible
How to apply
Send your resume and cover letter to hr@sesterce.com