Senior Software Engineer

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Senior Software Engineer

Westchester, IL, United States(Hybrid)

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About Us

IAA Holdings, LLC (IAA)

IAA Holdings, LLC (IAA), a Ritchie Bros. Auctioneers company (NYSE: RBA) and (TSX: RBA), is a trusted global marketplace for insights, services, and transaction solutions for commercial assets and vehicles. Leveraging leading-edge technology and focusing on innovation, IAA’s unique platform facilitates the marketing and sale of total-loss, damaged and low-value vehicles. IAA serves a global buyer base – located throughout over 170 countries – and a full spectrum of sellers, including insurers, dealerships, fleet lease and rental car companies, and charitable organizations. Buyers have access to multiple digital bidding and buying channels, innovative vehicle merchandising, and efficient evaluation services, enhancing the overall purchasing experience. IAA offers sellers a comprehensive suite of services aimed at maximizing vehicle value, reducing administrative costs, shortening selling cycle time and delivering the highest economic returns.

RB Global full-time employees are offered medical, dental, vision, and basic life insurances. Employees are able to enroll in our company’s 401k plan and RB Global will match 100% for the first 4% contributed. Employees will also receive 15 days of PTO each year.

Job Description

Senior .NET Backend Engineer – Microservices & Azure

Role Summary

We are looking for a skilled .NET Backend Engineer to design, build, and modernize backend systems using .NET Core (.NET 6/8, moving to .NET 10). The role focuses on microservices architecture, cloud‑native Azure services, and modern DevOps and testing practices, with close collaboration across frontend and platform teams.

Key Responsibilities

• Design, develop, and maintain backend services using .NET Core / modern .NET
• Lead and contribute to microservices architecture, including migration from monolithic systems
• Build and operate cloud‑native solutions on Microsoft Azure
• Develop and maintain Azure Function Apps and backend APIs
• Design data access layers using Cosmos DB, Azure Blob Storage, and SQL Server
• Implement and maintain secure authentication and authorization using SSO with Microsoft Entra ID
• Collaborate closely with frontend engineers and contribute as needed to UI work using React and/or Vue.js (component development, API integration, debugging, performance tuning).
• Write clean, testable, and maintainable code following best practices
• Create and improve unit tests, and actively work on increasing test coverage
• Participate in code reviews, architectural discussions, and technical decision‑making
• Use GitHub Copilot extensively to improve developer productivity while maintaining code quality

Required Skills & Qualifications

• Strong experience with C# and .NET Core / modern .NET (6, 8, or later)

• Experience working with or migrating toward .NET 10

• Solid understanding of microservices architecture and distributed systems

• Hands‑on experience converting monolithic applications to microservices

• Experience with Azure cloud services, including:

• Azure Function Apps

• Azure Cosmos DB

• Azure Blob Storage

• Azure SQL / SQL Server

• Strong knowledge of RESTful APIs and backend integration patterns

• Hands-on experience with modern JavaScript/TypeScript and React and/or Vue.js in a production environment.

• Ability to build and maintain UI components, handle state management, and integrate with backend APIs (REST).

• Working knowledge of frontend build tooling and workflows (npm/yarn, bundlers, linting, unit tests).

• Experience implementing authentication and authorization, preferably with Microsoft Entra ID (Azure AD)

• Familiarity with CI/CD pipelines, GitHub, and modern DevOps workflows

• Strong focus on unit testing, testability, and code quality

• Ability to work effectively in an Agile / collaborative team environment

Nice to Have

• Experience with mobile application backend support or mobile app development
• Familiarity with frontend technologies such as React or Vue.js
• Experience with performance optimization, observability, and monitoring in distributed systems
• Exposure to event‑driven architectures or messaging systems

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Job Info

• Job Identification8281
• Posting Date03/19/2026, 04:38 PM
• Locations2 Westbrook Corporate Ctr, Westchester, IL, 60154, US(Hybrid)
• Degree LevelNo Formal Education
• Job ScheduleFull time
• Minimum Salary99,140
• Maximum Salary123,950

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