Senior Software Engineer – Test/Internal Tooling

Senior Software Engineer – Test/Internal Tooling 

Parallel Systems is seeking a Senior 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 
• Provide technical mentorship and guidance to engineers across the testing and validation team 
• 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 

• 5+ years of software development skills and professional experience with both scripting (Python) and systems (C++/Rust) programming languages 
• 3+ years of experience building test software and/or internal tooling, with an emphasis on hard tech products in addition to conventional cloud software 
• Experience with both hardware-in-the-loop (HITL) testing and software-in-the-loop (SITL) simulations 
• Working proficiency with Linux, DevOps, cloud services, and containerization (Docker, Kubernetes) 
• Demonstrated success in leading technical design, setting direction, and mentoring other engineers 

Preferred Qualifications 

• 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