Senior Software Engineer

About Pre Pass

Pre Pass® is North America's most trusted weigh station bypass and toll management platform. We’re transforming how the transportation industry operates—creating solutions that keep trucks moving safely, efficiently, and compliantly. This means making bold decisions and building systems that support not only fleets but the broader economy. It all starts with enabling commercial vehicles to keep rolling with seamless toll management, weigh station bypass, and safety solutions.

It’s what we do best, and we do it to meet the demands of the road every day.

That’s why people join us: our solutions are implemented in real-time, on highways and interstates across the nation, helping fleets go farther, faster. This work challenges and rewards, presenting complex problems that need ambitious answers. We hire bold thinkers with a heart for impact, a passion for progress, and the optimism to shape the future of transportation.

We’re looking for a Senior Software Engineer to design and build working prototypes, proofs of concept (PoCs), and pilot-ready solutions that validate technical feasibility and accelerate decision-making. In this role, you will work across software development, cloud platforms, and hardware integration—collaborating closely with engineers in a hands-on lab environment and supporting field testing initiatives.

You will help evaluate emerging technologies and generate empirical evidence and documentation that can guide future production systems. This hybrid position is based in our Phoenix, AZ office, with in-office collaboration required at least three days per week to support lab work and hands-on testing.

Prototype Development & Technical Innovation

• Design, develop, and maintain complex software solutions using C#, modern .NET, and SQL Server, balancing rapid prototyping with maintainability and engineering quality.

• Develop cloud-native prototypes and services on Microsoft Azure (e.g., App Services, Azure Functions, Azure SQL, messaging and integration patterns, Storage).

• Build and evolve APIs and integration components that connect software systems with hardware devices, external services, and data sources.

• Explore and prototype containerized architectures (Docker, Kubernetes, and Azure container services) to evaluate portability, scalability, and deployment patterns.

• Design and implement applied AI capabilities within prototypes and PoCs, such as data analysis, inference, automation, or decision-support functionality.

Research, Prototyping & Evaluation

• Lead rapid development of PoCs and working prototypes, defining hypotheses, success metrics, and evaluation criteria.

• Collect data and observations to recommend whether initiatives should advance, pivot, or stop based on demonstrated technical feasibility.

• Ensure prototypes account for real-world constraints including deployment, scalability, maintainability, operational impact, and eventual production viability.

• Document architecture, design trade-offs, and technical findings to create blueprints for potential production systems.

• Investigate emerging technologies such as augmented reality (AR), spatial computing, and advanced visualization frameworks to support diagnostics, field testing, and next-generation user experiences.

Hardware Integration & Field Testing

• Partner closely with hardware-focused engineers to integrate components and develop working prototypes for new initiatives.

• Plan and execute hands-on lab and field testing of integrated hardware/software solutions to validate performance, reliability, and environmental resilience.

• Develop test harnesses, diagnostics, telemetry, and logging to support debugging and repeatable evaluation.

• Support field testing activities including deployment preparation, test procedures, and post-test analysis of results.

• Troubleshoot complex issues across hardware, firmware, networking, and software systems, performing root-cause analysis and implementing durable solutions.

Engineering Leadership & Collaboration

• Provide technical leadership through design reviews, code reviews, and architecture discussions.

• Advocate for engineering best practices, even…