Rack Design Engineer; Data Center

SpaceXAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. All employees are expected to be hands‑on and to contribute directly to the company’s mission.

Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.

The Data Center Engineering team designs training and inference compute clusters from first principles, pushing thermal, electrical, and optical systems to the limit of physics. We operate as a highly cross disciplinary team comprised of mechanical, electrical, optical, and software engineers, all working to maximize the efficiency, reliability, and deployment speed of terrestrial computing to serve rapidly scaling demand.

This team owns compute architecture, datacenter network design, rack builds, connectivity, in‑house design of our own computers, and the manufacturing line that builds that compute. As a Rack Design Engineer, you will own the rack as a product: structure, power, cooling, service paths, and the physical integration of servers, switches, optics, and liquid cooling from first sketch through production rate.

• Own mechanical, structural, and integration design of high‑density AI compute racks and associated chassis, frames, busbars, manifolds, and cable/fiber raceways
• Integrate compute, networking, power distribution, and liquid cooling into a buildable, serviceable, high‑yield rack architecture
• Design for the in‑house manufacturing line: DFM/DFA, fixtures, work instructions, incoming inspection, first article, and production ramp
• Close thermal, structural, and power constraints with cooling, electrical, optical, and network counterparts at the cluster level (CDUs, cold plates, quick disconnects, PDUs/busbars, high‑current distribution, tray and bend‑radius limits)
• Drive vendor and in‑house parts from concept to qualified production, including sheet metal, extrusions, busbar, manifolds, cable management, and rack accessories
• Stand on the floor during prototype and production builds: debug fit, leak, cable dress, airflow/liquid balance, and service time; fold issues into the next revision the same day
• Produce and maintain CAD, BOMs, drawings, and build documentation that a line can run at volume
• Support cluster deployment of the racks you design, including first‑site bring‑up and feedback into the next hardware generation
• Partner with network, optical, electrical, and firmware teams to deploy custom compute for inference and training across SpaceX programs

• Bachelor’s degree in mechanical engineering, aerospace engineering, or a related engineering discipline
• 2+ years of professional experience designing electromechanical hardware that was built and shipped (internship and project experience counts toward this if the hardware was physically produced)

• Ownership of rack, chassis, or similarly dense electromechanical products through prototype and production
• Experience or background in ethernet switching, networking, interconnects, and high power distribution
• CAD fluency in Solid Works, Creo, or NX, with released drawings a shop and a factory can build from
• AI / HPC / GPU rack design: NVIDIA HGX/GB-class, custom OCP, or equivalent high‑power liquid‑cooled compute
• Liquid…