Senior Fullstack Engineer, Phoenix

Senior Fullstack Engineer

PrePass is North America's most trusted weigh station bypass and toll management platform. We're transforming how the transportation industry operatescreating 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.About the Role

We're looking for a Senior Fullstack Engineer to architect and build systems that power real-time weigh station bypassing, tolling solutions, and safety alerts. In this role, you'll work across the stackfrom scalable.NET Core APIs to modern web frontends using React, TypeScript, and TailwindCSS. You'll collaborate closely with product, design, and engineering teams, and mentor others while shaping technical strategy.Essential Responsibilities

Backend Engineering&API Development Lead the design and development of scalable, reliable backend services using.NET Core and C#. Build APIs following RESTful principles, including pagination, versioning, authentication, and performance optimization. Ensure backend code quality through testing frameworks like xUnit or NUnit.Deploy and manage services on cloud platforms (Azure/AWS) using containers (Docker/Kubernetes). Frontend Development Architect and implement responsive, maintainable frontends with React, TypeScript, TailwindCSS, and MobX. Ensure UI consistency and performance across browsers and devices. Collaborate with design teams to deliver intuitive user experiences.Architecture&Technical Strategy Contribute to long-term technical strategy and architectural decisions. Design systems end-to-end, balancing trade-offs and scalability. Drive improvements in system performance, resilience, and observability. Team Leadership&Mentorship Mentor junior and mid-level engineers, fostering technical growth across the team. Lead code reviews and promote engineering best practices. Collaborate cross-functionally to shape technical solutions.