Lead Software Engineer (.NET

Roadrunner is growing, and we're looking for a highly motivated Lead Software Engineer (.NET) to join our winning team. If you're results-driven and want a fast-growing company with strong growth and earnings potential, apply today!

Much of our operation runs on software we build ourselves. We're modernizing our core platforms, moving off legacy systems and onto cloud-native, API-first services on Azure. We also have AI use cases running in production and are expanding them carefully.

As Lead Software Engineer (.NET), you'll drive engineering practices and hands-on design within the applications team, working closely with our Director of Architecture. Your work directly affects how freight moves.

This role may provide opportunities for future leadership growth based on business needs and individual performance. You'll start as a hands-on lead, and as you show leadership, you can take on broader responsibility for people, priorities, and technical direction.

What you’ll do Design and build scalable, secure services and web apps (C#, .NET 8+, ASP.NET Core, React, Azure)
Lead the modernization of legacy applications: refactoring, re-platforming, and replacing them step by step Design APIs and integrations with internal systems, customers, and partners

Own production quality: CI/CD, automated testing, observability, and secure coding

Mentor engineers on the team through code reviews, design discussions, and day-to-day coaching

Work directly with operations and business leaders to turn real freight problems into software

What you bring

Bachelor's degree in a related field, or equivalent experience8+ years building production software in C# and .NET, including modern .NET, ASP.NET Core, and Entity Framework Core Strong SQL Server skills: data modeling, query tuning, performance

Modern front-end knowledge (JavaScript/Type Script); backend depth matters most.

Hands-on Azure experience (App Service, Functions, Azure SQL, Storage, Application Insights, or similar)
Experience designing RESTful APIs and system integrationsA track record of improving or modernizing legacy .NET Framework systems

Experience setting engineering practices (Git-based workflows, CI/CD, testing, code review) and mentoring other developers

Comfort explaining technical tradeoffs to non-technical stakeholders

Nice to have Transportation, logistics, LTL, or supply chain experience

Hands-on React or Angular experience API gateway, microservices, or identity/authorization experience

Experience leading Scrum, Agile, or Kanban teams

Hands-on use of AI coding tools or building AI-enabled features

Compensation & Setup Pay: $120,000 – $130,000 base salary

Location:

Hybrid – Downers Grove, IL Benefits:
Comprehensive benefits package including medical, dental, vision, 401(k), and paid time off Physical Demands and Work Environment The physical demands and work environment described here are representative of those an employee encounters while performing the essential functions of this position. Reasonable accommodations may be made to enable qualified individuals with disabilities to perform the essential functions.

Physical Demands Sedentary physical activity performing non- strenuous daily activities of an administrative nature.

While performing the duties of the job, the employee is regularly required to sit, walk, stand, reach/handle items, work with the fingers, and talk and hear others in conversations via the phone or in person.

Work Environment Sedentary physical activity performing non- strenuous daily activities of an administrative nature.

While performing the duties of the job, the employee is regularly required to sit, walk, stand, reach/handle items, work with the fingers, and talk and hear others in conversations via the phone or in person.

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