Harbinger

Intern, Power Electronics Engineering

Posted 2 Days Ago

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Garden Grove, CA, USA

Hybrid

25-35 Hourly

Internship

Automotive • Energy

The Role

Support the power electronics team on EV prototype design and testing: size and design converters/inverters, perform PCB design and circuit simulation, conduct hands-on bring-up and validation, run worst-case analyses, collaborate on mechanical integration, and produce technical reports and presentations.

Summary Generated by Built In

About Harbinger

Harbinger is an American commercial electric vehicle (EV) company on a mission to transform an industry starving for innovation. Harbinger’s best-in-class team of EV, battery, and drivetrain experts have pooled their deep experience to bring a first-of-its-kind EV platform to support the growing demand for medium-duty EVs and Hybrids. Harbinger: Familiar Form, Revolutionary Foundation.

Job Overview:

Location: Immerse yourself in our innovative culture! This role requires a commitment of 4 days in-office per week at our facility in Garden Grove, CA as well as full-time hours (40 hours a week).
Duration: 11-14 weeks (Sep 8 to Dec 11 OR Sep 21 to Dec 4)
Relocation Support: A $1,000 relocation stipend is available for interns currently residing more than 50 miles from Garden Grove, CA.
Compensation: Earn an hourly rate of $25-35 USD per hour.

Job Summary:

We seek an ambitious engineering student to join our team to assist with electrical engineering design and test projects on electric vehicle prototypes and associated test apparatus. As part of a small (~6 person) power electronics team, this role offers a significant opportunity to acquire hands-on automotive engineering experience as well as high level knowledge of electric vehicle systems, engineering and product design processes, and vehicle testing. The role also offers the opportunity to build valuable experience at a fast paced, high growth startup during a critical early product development stage.

What You'll Do:

Sizing and design of power electronics components such as inverter, on-board battery chargers, DC-DC converter for commercial trucks.
Hands-on testing, bring-up and validation of power converters / motor controllers.
Mixed-signal PCB design based on IPC and IEC standards
Worst case circuit analysis on critical areas of the overall system.
Circuit simulation using LTspice and PLECS.
Collaborate with mechanical designers to integrate electrical devices in product designs
Write technical reports and present at design reviews

What You'll Bring:

Thorough understanding of analog electronics circuits, digital electronic circuits, power supply design, magnetics design and control theory
Prior coursework and experience with Power Electronics and high voltage systems.
Working knowledge of High voltage systems in automotive.
Experience in hands-on electrical fabrication and/or troubleshooting
Experience in basic PCB layout
Experience in setup and use of data acquisition systems
Work authorized in the United States OR ability to obtain J-1/F-1 visa
Currently registered in a Bachelor’s, Master’s or PhD program focused on Power electronics.

Equal Opportunity

Harbinger is an equal opportunity employer and complies with all applicable federal, state, and local fair employment practices laws. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, ancestry, sex, sexual orientation, gender, gender expression, gender identity, genetic information or characteristics, physical or mental disability, marital/domestic partner status, age, military/veteran status, medical condition, or any other characteristic protected by law.

Harbinger is committed to ensuring that our hiring process is accessible for persons with disabilities. If you have a disability or limitation, such as those covered by the Americans with Disabilities Act, that requires accommodations to assist you in the search and application process, please email us at [email protected].

Candidate Data Privacy

Harbinger may collect, use and disclose your personal information or personal data (within the meaning of the applicable data protection laws) when you apply for employment and/or participate in our recruitment processes (“Candidate Personal Data”). This data includes contact, demographic, communications, educational, professional, employment, social media/website, network/device, recruiting system usage/interaction, security and preference information. Harbinger may use your Candidate Personal Data for the purposes of (i) tracking interactions with our recruiting system; (ii) carrying out, analyzing and improving our application and recruitment process, including assessing you and your application and conducting employment, background and reference checks; (iii) establishing an employment relationship or entering into an employment contract with you; (iv) complying with our legal, regulatory and corporate governance obligations; (v) recordkeeping; (vi) ensuring network and information security and preventing fraud; and (vii) as otherwise required or permitted by applicable law.

Harbinger may share your Candidate Personal Data with (i) internal personnel who have a need to know such information in order to perform their duties, including individuals on our HR, legal, and finance teams, and the team(s) with the position(s) for which you are applying; (ii) Harbinger affiliates; and (iii) Harbinger’s service providers, including providers of background checks, staffing services, and cloud services.

Harbinger may transfer or store internationally your Candidate Personal Data, including to or in the United States, Canada, the United Kingdom, and the European Union and in the cloud, and this data may be subject to the laws and accessible to the courts, law enforcement and national security authorities of such jurisdictions.

Please note that we are currently not accepting applications from third party application services. Any unsolicited resumes or candidate profiles submitted in response to our job posting shall be considered the property of Harbinger and are not subject to payment of referral or placement fees if any such candidate is later hired by Harbinger unless you have a signed written agreement in place with us which covers the applicable job posting.

Skills Required

Currently enrolled in a Bachelor's, Master's, or PhD program focused on Power Electronics
Work authorized in the United States OR ability to obtain J-1 or F-1 visa
Thorough understanding of analog and digital electronic circuits, power supply design, magnetics design, and control theory
Prior coursework and experience with power electronics and high voltage systems
Working knowledge of high voltage systems in automotive applications
Experience in hands-on electrical fabrication and troubleshooting
Experience in basic PCB layout and mixed-signal PCB design (IPC and IEC standards)
Circuit simulation experience using LTspice and PLECS
Experience setting up and using data acquisition systems
Experience sizing and designing inverters, on-board chargers, and DC-DC converters
Ability to write technical reports and present at design reviews; collaborate with mechanical designers

Harbinger Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Harbinger and has not been reviewed or approved by Harbinger.

Fair & Transparent Compensation — Pay is considered competitive for its market and stage, and feedback suggests ranges are posted and compensation is communicated clearly in listings.
Healthcare Strength — Health coverage is highlighted as 100% employer‑paid for employees across postings, indicating strong medical, dental, and vision support.
Leave & Time Off Breadth — Time off is described as generous, with parental leave and an annual vacation bonus appearing alongside core PTO.

Learn more about Harbinger's Compensation & Benefits →

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The Company

HQ: Garden Grove, CA

407 Employees

Year Founded: 2021

What We Do

Harbinger is a commercial electric vehicle (EV) company on a mission to transform an industry starving for innovation. Harbinger's best-in-class team of EV, battery, and drivetrain experts have pooled their deep experience to support the growing demand for medium-duty EVs. Leveraging a foundation of proprietary, in-house developed vehicle technologies designed specifically for commercial vehicles, Harbinger is bringing a first-of-its-kind EV platform to market, priced for zero acquisition premium. Harbinger: familiar form, revolutionary foundation.