Validation Engineer; System Integration

Join to apply for the Validation Engineer (System Integration) role at Apex Systems

Base pay range: $50.00/hr - $75.00/hr

• Role: System Integration Engineer
• Duration Type: 12 months
• Location: Bellevue, Seattle
• Type: Full-Time (Site Based)
• Travel: 15-20% nationally and internationally

Join a scaling electrification program within an EV Charging team. You will contribute to the design, development, and testing of large‑scale power conversion systems, enabling the deployment of next‑generation charging infrastructure across the U.S.

You'll join a team focused on ensuring the reliability and safety of the company’s EV charging infrastructure through systematic testing and validation. Our EV charging network is one of the largest in the world for private fleets. We value attention to detail, thorough documentation, and efficient test automation, working closely with vendors to maintain high standards across our charging network.

• Define, develop and maintain functional testing plans for power converters and EV chargers to meet product and operational requirements. Lead and execute the test in vendor labs and Amazon field sites. Document and report test results. – 30%
• Collect field failure data and perform initial root cause investigation. Work with vendors to root cause failures and verify corrective actions. – 20%
• Review product materials (spec sheets, manuals, schematics, test reports, etc.) to identify gaps to meet our standard equipment documents and interface control documents. – 20%
• Work with product, engineering and electrical design teams to develop and standardize DC system specifications for various architectures. – 10%
• Work with product, engineering and electrical design teams to develop and maintain system‑level failure mode analysis for various DC architectures. – 10%
• Support design improvements for DC systems by contributing to key design reviews and participating in witness tests of sample products. – 10%
• Travel (20%) nationally and internationally across vendors and field sites to perform tests, commissioning and validation.

• 7+ years of engineering experience in power electronics/power systems design, integration and testing (industrial / motor / utility).
• Demonstrable knowledge of DC power system controls (industrial/C&I/motor drives).
• Hands‑on familiarity with electrical protection (e.g., fault detection, protection relays, system reliability).
• Program‑management experience: leading system hardware design and integration, coordinating across functions, tracking milestones.
• Bachelor’s degree (master’s preferred) in Electrical Engineering or similar and several years of industrial experience (≥ 7 years).
• Strong technical writing skills and documentation practices.
• Vendor collaboration experience.
• Cross‑team collaboration.

Mid‑Senior level

Full‑time

Quality Assurance