Senior Software Engineer

Roadrunner•Downers Grove, IL

1d•Hybrid

About The Position

As a Senior Software Engineer, you will be involved in all aspects of the design, architecture, engineering, modernization, and maintenance of Roadrunner’s proprietary systems. Your focus will be on building scalable, secure, cloud-ready software solutions that improve business efficiency, operational visibility, and customer service. In this role, you'll own complex, multi-interface technical solutions from concept to delivery, not just contribute to them. You'll partner directly with business stakeholders, analysts, and technology leaders to surface opportunities, assess feasibility, and ship high-quality software. As a senior engineer, you'll lead engineering efforts, set the standard for modern development practices, and operate independently without needing a roadmap handed to you. If you thrive on accountability and technical breadth, this is your seat. As a Senior Engineer, you will lead the design and implementation of modern software architecture while promoting strong engineering standards, improving development efficiency, and mentoring fellow developers to advance the organization toward cloud-native, API-first, and DevOps-enabled delivery practices. Day to day, you will develop new systems, enhance existing applications, support and optimize the performance of production environments, integrate internal and external platforms, and partner closely with the business to solve operational challenges through technology.

Requirements

Bachelor’s degree in Computer Science, Information Technology, Engineering, or related field (or equivalent experience)
5+ years of software development experience within the Microsoft technology stack
Deep expertise in modern .NET (6/7/8+), ASP.NET Core, Web API, and Entity Framework Core
Strong experience with ASP.NET MVC, modern front-end frameworks (Angular or React), and TypeScript/JavaScript ecosystems
Advanced SQL Server expertise, including database design, performance tuning, and query optimization
Experience designing RESTful APIs, integrations, and service-oriented architectures
Proven experience developing cloud-native applications, preferably within Microsoft Azure
Hands-on experience with Azure services such as App Service, Functions, Azure SQL, and Application Insights
Experience with CI/CD, Git-based source control, and platforms such as Azure DevOps or GitHub Actions
Strong foundation in application security and secure development practices
Experience with automated testing, observability, and performance monitoring
Demonstrated ability to troubleshoot and resolve production issues efficiently

Nice To Haves

Experience in transportation, logistics, freight, or supply chain systems
Familiarity with Agile, Scrum, or Kanban delivery models
Experience with API gateways, authentication/authorization, and API lifecycle management
Track record of modernizing legacy systems through cloud migration or incremental refactoring
Experience mentoring engineers and shaping engineering standards

Responsibilities

Architect and deliver scalable software solutions: Design and implement secure, scalable, and cloud-native applications using modern Microsoft technologies. Apply API-first, modular, and service-oriented architecture principles to platform development. Lead technical design decisions that align with long-term system scalability and maintainability. Ensure solutions meet performance, reliability, and business expectations.
Drive modernization and system evolution: Lead initiatives to modernize legacy .NET Framework applications through refactoring or cloud migration. Identify and eliminate technical debt while preserving system stability. Champion best practices in software architecture, design patterns, and coding standards. Partner with infrastructure and security teams to align modernization efforts with enterprise strategy.
Strengthen engineering quality and DevOps maturity: Promote CI/CD pipelines, automated testing, and secure development practices. Implement observability strategies, including logging, monitoring, and performance tracking. Participate in and lead code reviews, ensuring high-quality, maintainable code. Improve engineering workflows to increase speed without compromising quality.
Enable cross-functional execution: Collaborate with product owners, business stakeholders, and analysts to translate requirements into technical solutions. Communicate complex technical concepts in clear, business-aligned language. Align engineering deliverables with business priorities, timelines, and operational requirements. Support production systems and respond to critical incidents with urgency and ownership.
Lead through technical influence and ownership: Take ownership of application performance, uptime, and customer impact. Mentor developers and contribute to the growth of engineering standards and practices. Drive accountability for outcomes across projects and initiatives. Contribute to continuous improvement of team processes and technical capabilities.