Senior Fullstack Engineer

PrePass is North America's most trusted weigh station bypass and toll management platform, transforming the transportation industry with innovative solutions. The Senior Fullstack Engineer will architect and build systems for real-time weigh station bypassing and tolling solutions, collaborating across teams and mentoring others while shaping technical strategy.

Responsibilities:

• 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)
• 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
• 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
• 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

Requirements:

• 7+ years of professional software engineering experience, including significant fullstack development
• Expert-level skills with .NET Core and C#, including API development and optimization
• Hands-on experience with React, TypeScript, TailwindCSS, and MobX (or similar state management)
• Deep understanding of relational databases (SQL Server, PostgreSQL, etc.) and data modeling
• Strong testing discipline across backend systems
• Experience deploying to cloud platforms and working with containers
• Familiarity with observability tools (metrics, logging, tracing)
• Proven track record of mentoring engineers and raising engineering standards
• Experience with domain-driven design (DDD), clean architecture, or microservices
• Knowledge of GraphQL or advanced REST patterns
• Experience with nonrelational databases (Cosmos DB, MongoDB, DynamoDB)
• Hands-on experience with serverless functions, API gateways, CI/CD pipelines, and event-driven messaging (e.g., Service Bus, Event Hubs)
• Experience building distributed systems using NServiceBus or MassTransit