Senior System Quality Engineer

Terawatt Infrastructure•Los Angeles, CA

3d•$125,000 - $140,000•Remote

About The Position

Terawatt Infrastructure is a leader in delivering large-scale, turnkey charging solutions for companies rapidly deploying AV and EV fleets. The company develops, finances, owns, and operates charging solutions that take the cost and complexity out of electrifying fleets. Terawatt's technology platform transforms a portfolio of sites into a reliable, intelligent network through advanced power management, operational optimization, and data-driven systems. This role sits at the intersection of software, hardware, real estate, energy systems, and live site operations, with the opportunity to build systems that orchestrate megawatts of power and ingest millions of telemetry events per day. As a Systems Quality Engineer on the Terawatt technology team, you will own the processes and data that ensure charging systems perform to specification. You will define quality standards, measure performance, and drive engineering and operations teams to close any gaps. Your responsibilities will include validating the quality and performance of full-stack products, focusing on high-power EV charging solutions and energy management systems. This role has strong ties to field operations, software, and hardware procurement.

Requirements

5+ years in a quality engineering, reliability engineering, or systems engineering role — ideally in power electronics, energy storage, EV charging, or industrial electrical equipment.
Ability to read and interpret electrical schematics, system architecture diagrams, and hardware test reports.
Expertise in high-voltage and low-power electrical systems, including deep, protocol-level debugging of complex in-field customer issues in the EV charging space.
Demonstrated hands-on debugging expertise of communication protocols between EV & EVSE including ISO 15118-2 & 20, DIN 70121, and OCPP protocols.
Experience in practical understanding of CCS, NACS, MCS standards.
Hands-on experience validating local site energy management infrastructure including energy meters, local controllers, load limiting, and complex grid interactions with DERs (BESS & Solar).
Strong communication skills to collaborate effectively in a dynamic, cross-functional remote work environment.
Ability to work with ambiguity, manage multiple projects and independently collaborate with internal teams and external partners.

Nice To Haves

Working knowledge of OCPI & OCPP 2.0.1 standards.
Familiarity with charge management systems and fleet telematics data.
Working experience with Hardware and IoT integrations into backend services.
Hands-on experience with EV/EVSE Emulator systems for functional and integration testing.
Hands-on experience with automation in Python and integrating with CI/CD pipelines.

Responsibilities

Define and maintain quality standards for Terawatt's charging systems, uptime thresholds, fault rates, charge session success rates, and hardware failure modes, and build the measurement infrastructure to track them.
Contribute to a product-driven engineering culture that champions diverse ideas and bottom-up innovation.
Analyze field performance data to identify systemic failures, distinguish one-off events from recurring defect patterns, and prioritize engineering response accordingly.
Develop and implement comprehensive QA testing standards, specifically focused on OCPP and ISO 15118 communication protocols and system logs.
Triage and perform advanced root cause analysis on product or system issues, using network analysis tools like Wireshark and .pcap files to debug vehicle-to-charger communication and complex field failures.
Collaborate closely with vendors to manage and support resolution of critical firmware, hardware, and integration defects, ensuring alignment with technical specifications and SLAs for timely delivery and reliable operation of new features.
Ensure lab-to-site validation consistency by verifying that lab configurations and units exactly match field deployments to mitigate risks of unforeseen operational differences.
Develop and maintain inspection protocols for new site commissioning; ensure sites are handed off to operations meeting defined quality gates.
Collaborate with Operations to define and validate Standard Operating Procedures (SOPs) at the lab before deployment, and coordinate logistics for the delivery and return of large EVSE test units.
Contribute to the quality and reliability planning for charging & energy management systems, including local site energy management infrastructure (energy meters, local controllers, and DERs like BESS & Solar).
Collaborate with Terawatt Operations and other stakeholders to ensure highly reliable operations and quality customer experiences at our charging facilities.