Senior Software Engineer

About Us
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.

Overview

JOB DESCRIPTION
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 Signal

R and Web Sockets

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

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