Validation Engineer (System Integration)

Apex Systems; Bellevue (WA); On-site; USD 68,880 - 103,320; Full time

Job summary

A leading technology firm is seeking a System Integration Engineer based in Bellevue, WA. You will play a crucial role in the electrification program, focusing on the design and testing of EV charging infrastructure. The ideal candidate brings over 7 years of engineering experience in power systems and electrical protection, along with a strong educational background in electrical engineering. Responsibilities include defining testing plans, conducting investigations, and supporting design improvements. This full-time position offers competitive compensation and the opportunity for travel.

Qualifications

• 7+ years of engineering experience in power electronics or power systems design.
• Demonstrable knowledge of DC power system controls.
• Hands-on familiarity with electrical protection mechanisms.
• Experience in program management for hardware design and integration.

Responsibilities

• Define and execute testing plans for power converters and EV chargers.
• Collect field failure data and perform root-cause investigation.
• Review product materials to identify gaps.
• Work with teams to develop DC system specifications.
• Develop and maintain system-level failure-mode analysis.
• Support design improvements with key design reviews.

Skills

Power electronics design

DC power system controls

Electrical protection

Program management

Technical writing

Vendor collaboration

Cross-team collaboration

Education

Bachelor’s degree in Electrical Engineering

Master’s degree (preferred)

Job description

Job #3012713

Role: System Integration Engineer

Duration Type: 12 months

Location: Bellevue, Seattle

Type: Full‑time (Site‑based)

Travel: 15–20% nationally and internationally

Base Pay Range: $50.00/hr – $75.00/hr

Overview

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 and solutions across the U.S. The team focuses on ensuring the reliability and safety of the company’s EV charging infrastructure through systematic testing and validation. The 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.

Key Responsibilities

• 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 the corrective actions. – 20%
• Review product materials (e.g., spec sheet, manual, schematics, test reports, etc.) to identify product gaps to meet our standard equipment document and interface control document. – 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 the system‑level failure‑mode analysis for various DC architectures. – 10%
• Support design improvements for DC systems by contributing to the 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.

Must‑Have Skills

• 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 degree 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.

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.