Senior Product Engineer

Role Overview

We're looking for a Senior Product Engineer to own the technical design, specification, and continuous improvement of our BESS and DC Cabinet product lines. This is a product role at its core: you'll author technical specifications, drive vendor engagement, perform detailed component sizing, and partner with project, commissioning, and O&M teams to close the loop between field experience and product design. You should have lived through full product development cycles and know how to bring engineering discipline into a fast-moving environment with frequent release cycles.

What You’ll Do

Product Definition & Specification

• Author and maintain detailed technical specifications for the BESS and DC Cabinet — electrical, mechanical, environmental, and interface requirements.
• Review and approve detailed engineering drawings: SLDs, GAs, schematics, wiring diagrams, panel layouts, mechanical drawings, and BoMs. Own the technical change baseline.
• Perform in-depth component sizing: fuses, busbars, cables, contactors, disconnects, protection coordination, short-circuit and arc-flash inputs, and thermal sizing of cabinets (forced air / HVAC, natural convection, hot-spot analysis, derating).

Vendor & Supply Chain Engagement

• Lead technical engagement with key vendors — particularly on the DC Cabinet — driving specs into RFQs, evaluating vendor designs, running design reviews, and resolving issues through prototyping, FAT, and serial production.
• Qualify alternate suppliers and own the technical side of dual-sourcing and cost-down decisions.

Product Development

• Drive iterative product development cycles with the development team, balancing speed with the rigor expected of mission-critical hardware.
• Capture design feedback from design reviews, commissioning, and O&M, and convert it into prioritized changes on the product roadmap via a structured ECR/ECN process.
• Run trade studies on architecture and component selection where it matters — cost, reliability, lead time, performance.

Project & Commercial Support

• Support business development with technical proposals — SLDs, GAs, and SOC analysis across multiple market applications.
• Compile and own the product technical information package handed to project engineering.
• Co-lead review and validation of BESS- and DC Cabinet-related topics during project execution.
• Maintain as-built drawings and the engineering document baseline.
• Participate in commissioning, particularly for first-of-kind deployments, and bring lessons learned back into the product.

Required Qualifications

• Bachelor's degree in Electrical Engineering, Power Electronics, or a closely related technical field.
• 6+ years of hands-on engineering experience in BESS, power electronics, UPS, or comparable mission-critical / industrial power systems, with clear evidence of ownership through full product development cycles.
• Proven product or system-level design experience on MWh-scale BESS or equivalent DC power equipment.
• Demonstrated experience taking a product through the full development cycle — concept, prototype, FAT, field deployment, revision — in an environment with frequent release cycles.
• Strong, demonstrable skill in detailed component sizing: fuses, cables, busbars, protection devices, and thermal sizing for enclosed cabinets.
• Fluency producing and reviewing SLDs, GAs, schematics, and panel layouts; comfortable in AutoCAD or equivalent E-CAD tools and reading mechanical drawings.
• Track record of running technical vendor relationships through design, FAT, and post-deployment.
• Excellent written communication — specs, design reviews, change notices — and the ability to translate between engineering, project, and commercial teams.
• Willing to travel up to 20%.

Preferred Plus

• Experience with data center / UPS / mission-critical power or utility-scale BESS.
• Familiarity with UL 9540 / 9540A and NFPA 855, plus the relevant codes for your target market.
• Experience with PLM tools and structured ECR/ECN workflows.