Overview

We are seeking a Senior C#/.NET Developer who is passionate about modern technologies, scalable architectures, and high‑performance systems. This role involves close collaboration with fellow engineers, product owners, and solution architects to design and deliver robust, scalable, and maintainable applications.

The ideal candidate brings deep hands-on experience with the Microsoft technology stack, a strong understanding of software design principles, and a desire to mentor and elevate the engineering team.

Responsibilities

• Design, develop, implement, and maintain high‑performance, scalable applications using the Microsoft technology stack
• Collaborate with cross‑functional teams including developers, product architects, and stakeholders
• Apply best practices in object‑oriented design, design patterns, and modern development methodologies
• Contribute to architecture and technical design decisions
• Support and troubleshoot production systems in a timely and effective manner
• Participate in Agile ceremonies and contribute to continuous improvement initiatives
• Mentor junior and mid‑level engineers and promote engineering excellence

Required Technical Skills

• 7+ years of professional application development experience using Microsoft technologies
• Strong expertise in:
  • C#, ASP.NET, ASP.NET MVC, Web API
  • SQL Server
• Experience with:
  • Parallel task and multi‑threaded programming
  • Asynchronous programming (async/await), delegates, and concurrency concepts
• Solid understanding of:
  • Object‑Oriented Programming (OOP), interfaces, and SOLID principles
  • Design patterns including Dependency Injection and Domain‑Driven Design (DDD)
• Front‑end development experience with:
  • JavaScript, jQuery, JSON, HTML5
  • MVVM architecture
  • Knockout.js (required)
• Experience working in Agile/Scrum development environments

Preferred / Nice‑to‑Have Skills

• Experience with real‑time communication technologies such as SignalR and WebSockets
• Exposure to or hands‑on experience with Microsoft Azure (App Services, APIs, cloud architecture, etc.)
• Experience integrating RESTful services and APIs

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or a related field
• Minimum 7 years of professional application development experience
• Excellent verbal and written communication skills with the ability to collaborate across teams
• Strong organizational and time‑management skills with keen attention to detail
• Demonstrated commitment to continuous learning through research, experimentation, and training
• Proven ability and desire to mentor and guide team members

• Should be proficient in both application development, application support and maintenance of production system.
• Minimum 7-10 years of application design and development experience
• Expert level knowledge and experience with Java
• Expert level knowledge and experience with Spring Framework
• Expert knowledge and experience of developing and consuming Web Services using REST and SOAP.
• Expert knowledge with Spring boot micro-service, Spring Cloud, API development and API security.
• Experience working in relational databases: MySQL/Oracle/Postgres
• Experience with Web and Application Servers, Tomcat preferred.
• Experience writing unit and integration test, preferred Junit, Mockito.
• Experience supporting and troubleshooting systems and software running in Prod.
• Preferred Skills:
• Experience with Agile Scrum
• Experience with TDD and Pair Programming
• Experience with modern CI/CD tools and deployment pipelines
• Experience with Git/Bitbucket
• Experience with AWS
• Experience with containerization tools like Docker, Kubernetes
• Experience with Full stack development using HTML5, Java Script,Type Script, AngularJS.

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.

Ritchie Bros. is an equal opportunity employer and ensures nondiscrimination in all activities in accordance with all applicable laws. This position is open to all qualified applicants who are legally entitled to work in the country in which this job is located. Candidate selection is made by Talent Acquisition. Only electronic applications can be accepted.