Location & work modality: HQ Rubí (near Barcelona) / hybrid model

Start: ASAP

Type of Contract: Full Time / Permanent

About Submer Submer designs and delivers end-to-end AI datacenter infrastructure built around industry-leading liquid cooling.

We help organizations scale AI beyond the limits of traditional datacenters by enabling higher density, greater efficiency and lower environmental impact – accelerating time-to-AI from first deployment to full production.

What Impact You Will Have We are seeking an Electrical Engineer to lead the design and delivery of electrical systems for high-density data centers, including both conventional and direct liquid cooling (DLC) facilities. This role is focused on ensuring safe, resilient, and scalable electrical infrastructure; from utility interface down to rack-level distribution, supporting mission-critical environments and next-generation compute platforms. The ideal candidate combines strong technical expertise with hands-on project experience and thrives in multidisciplinary teams delivering complex data center projects.

What You’ll Do Electrical System Design & Engineering

• Develop end-to-end electrical designs for data centers (MV, LV, UPS, generators, busbars, PDUs, rack-level distribution).
• Produce detailed schematics, one-line diagrams, layout drawings, and technical specifications.
• Integrate electrical design with mechanical and IT systems, with a special focus on DLC requirements and interfaces.
• Lead design reviews and ensure compliance with project requirements, client standards, and industry best practices.

Power Distribution & Analysis

• Perform load flow, short-circuit, selectivity, and reliability studies using industry-standard tools.
• Specify and validate switchgear, transformers, busbar systems, protective devices, and cabling for high-current distribution.
• Evaluate redundancy schemes (N, N+1, 2N) and contribute to Tier certification requirements.

Commissioning & Delivery

• Support procurement, vendor evaluation, and technical submittal reviews.
• Oversee factory acceptance tests (FATs), site acceptance tests (SATs), commissioning, and handover activities.
• Troubleshoot electrical issues, drive root cause analysis, and implement corrective measures.

Compliance & Documentation

• Ensure all designs comply with NEC/IEC codes, local regulations, and global data center standards.
• Develop and maintain technical documentation, including specifications, test protocols, and O&M manuals.
• Contribute to risk assessments, method statements, and safety compliance plans.

Collaboration & Expertise

• Work closely with clients, architects, mechanical engineers, and IT specialists to deliver integrated solutions.
• Provide subject matter expertise on DLC - specific electrical design challenges (higher rack densities, liquid-to-liquid interfaces, safety protocols).

What You’ll Need

• Bachelor’s or Master’s degree in Electrical Engineering (or related field).
• Minimum 4 years of proven experience in mission-critical electrical design, with demonstrable data center project delivery.
• Strong knowledge of power distribution from MV/LV down to rack-level (busbars, PDUs, server power delivery).
• Experience with direct liquid cooling (DLC) environments and high-density compute facilities.
• Strong understanding of Tier certification requirements, electrical codes (NEC, IEC), and international standards.
• Excellent problem-solving, analytical, and troubleshooting skills.
• Strong communication and collaboration skills with multidisciplinary teams.

What We Offer

• Attractive compensation package reflecting your expertise and experience.
• Restaurant Pass.
• Private Health Insurance.
• Languages classes (English).
• A healthy work environment with fresh fruits to energise and an on-site gym for active breaks.
• A great work environment characterised by friendliness, international diversity, flexibility, and a hybrid-friendly approach.
• You'll be part of a fast-growing scale-up with a mission to make a positive impact, offering an exciting career evolution.

Our Inclusive Responsibility Submer is committed to creating a diverse and inclusive environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, or any other protected category under applicable law.

From concept to deployment, we create liquid-cooled datacenters that scale smarter, run cleaner and cost less.