Software Engineer II – Test/Internal Tooling

re-zoo-me; Los Angeles (CA); Hybrid; USD 140,000 - 164,000; Full time

Job summary

Parallel Systems is seeking a Software Engineer II – Test/Internal Tooling to design, develop, and maintain critical test software and infrastructure for autonomous rail vehicles. You will work across product, software, hardware, and IT teams to deliver reliable testing solutions for both on-vehicle and cloud-based systems.

The role emphasizes building testing frameworks, hardware test stands, and CI pipelines, while mentoring engineers and contributing to safety/regulatory documentation to

Qualifications

• 3+ years of software development with scripting and systems languages (Python, JS, C++/Rust).
• Experience with hardware-in-the-loop and software-in-the-loop testing/simulations.
• Design testing frameworks and maintain CI pipelines; mentor engineers.

Responsibilities

• Design, develop, and maintain testing frameworks for on-vehicle software and cloud-based services.
• Build hardware test stands for vehicle subsystems.
• Maintain CI pipeline with focus on reliability, speed, and cost.
• Collaborate with hardware/software teams to develop internal tooling.
• Contribute to regulatory documentation, including software traceability and test protocols.
• Lead project milestones and guide team on testing strategy.

Skills

Python

JavaScript

C++/Rust

Linux

CI/CD

Testing infrastructure

Tools

CI/CD pipelines

SITL/HITL testing

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 requiresstrong software development skills as well asdeepexpertisein testing both cloud-based software andphysical hardware systems.Moreover, candidates will need to be able to guide overall testing strategy, mentor engineers, and collaborate across product,software, hardware, and infrastructure/ITteams to deliver reliable, scalable solutions.

Responsibilities

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

What Success Looks Like

• After 30 Days: You'vedeveloped a working understanding of our testinginfrastructureand is activelyassistingin thebring-up of new test systems.
• After 60 Days: You’vedevelopeda deep understandingof our testing infrastructure.You areassistingin significant overhauls and expansions to our testing capabilities, as well asactivelydriving discussions around the testing team’s overall strategy and priorities.
• After 90 Days: You’vedelivered major testing featuresand 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 withbothhardware-in-the-loop (HITL)testingandsoftware-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 USD - $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.