Software Engineer II – Test/Internal Tooling

parallel

Los Angeles, CA · Los Angeles · United States

Posted Jun 24, 2026

Other
Engineering

Job description

Parallel Systems is pioneering autonomous battery-electric rail vehicles designed to transform freight transportation by shifting portions of the $900 billion U.S. trucking industry onto rail. Our innovative technology offers cleaner, safer, and more efficient logistics solutions. Join our dynamic team and help shape a smarter, greener future for global freight.

Software Engineer II – Test/Internal Tooling

Parallel Systems is seeking a Software Engineer to design, develop, and maintain critical test software/infrastructure for an autonomous rail vehicle. In this role, you will work with systems required to ensure that our autonomous rail vehicles satisfy all regulatory, technical, and safety requirements.

This position requires strong software development skills as well as deep expertise in testing both cloud-based software and physical hardware systems. Moreover, candidates will need to be able to guide overall testing strategy, mentor engineers, and collaborate across product, software, hardware, and infrastructure/IT teams to deliver reliable, scalable solutions.

Responsibilities

Design, develop, and maintain testing frameworks for on-vehicle software as well as cloud-based services
Design, develop, and maintain hardware test stands for the vehicle subsystems
Maintain continuous integration (CI) pipeline, with an emphasis on reliability, speed, and cost effectiveness
Partner with hardware and software teams to develop useful internal software tooling
Contribute to regulatory documentation, including software traceability and test protocols
When appropriate, step into project leadership, ensuring milestones are well-defined and achieved

What Success Looks Like

After 30 Days: You've developed a working understanding of our testing infrastructure and are actively assisting in the bring-up of new test systems.
After 60 Days: You’ve developed a deep understanding of our testing infrastructure. You are assisting in significant overhauls and expansions to our testing capabilities, as well as actively driving discussions around the testing team’s overall strategy and priorities.
After 90 Days: You’ve delivered major testing features and are proactively ensuring the testing team’s roadmap is aligned with the company’s future milestones.

Basic Requirements

3+ years of software development skills and professional experience with both scripting (Python, JS, etc.) and systems (C++/Rust) programming languages
Professional experience, or a high interest, in working on software test infrastructure with the ability to reason about correctness, performance, and system design
Experience with both hardware-in-the-loop (HITL) testing and software-in-the-loop (SITL) simulations
Working proficiency with Linux and the software test/build/deploy lifecycle
Demonstrated success in leading technical design, setting direction, and mentoring other engineers

Preferred Qualifications

2+ years of experience building test software and/or internal tooling, with an emphasis on hard tech products in addition to conventional cloud software
Experience in safety-critical domains such as autonomous vehicles, industrial control, or aerospace
Knowledge of rail control systems (strong plus)
Ability to work cross-functionally and balance technical depth with product impact
Experience with polyglot codebases

We are committed to providing fair and transparent compensation in accordance with applicable laws. Salary ranges are listed below and reflect the expected range for new hires in this role, based on factors such as skills, experience, qualifications, and location. Final compensation may vary and will be determined during the interview process. The target hiring range for this position is listed below.

Target Salary Range:

$140,000—$164,000 USD

Parallel Systems is an equal opportunity employer committed to diversity in the workplace. All qualified applicants will receive consideration for employment without regard to any discriminatory factor protected by applicable federal, state or local laws. We work to build an inclusive environment in which all people can come to do their best work.

Parallel Systems is committed to the full inclusion of all qualified individuals. As part of this commitment, Parallel Systems will ensure that persons with disabilities are provided reasonable accommodations. If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact your recruiter.