Fullstack Software Engineer - C#

Job Description:

Company Description

McDonald’s growth strategy, Accelerating the Arches, encompasses all aspects of our business as the leading global omni-channel restaurant brand. As the consumer landscape shifts we are using our competitive advantages to further strengthen our brand. One of our core growth strategies is to Double Down on the 3Ds (Delivery, Digital and Drive Thru). McDonald’s will accelerate technology innovation so 65M+ customers a day will experience a fast, easy experience, whether at one of our 25,000 and growing Drive Thrus, through McDelivery, dine‑in or takeaway.

McDonald’s Global Technology is here to power tomorrow’s feel-good moments.

That’s why you’ll find us at the forefront of transformative technology, exploring new and innovative ways to serve our millions of customers and spread happiness one delicious Hot Fudge Sundae-dipped fry at a time. Using AI, robotics and emerging tech, we’re digitizing the Golden Arches. Combine that with our unparalleled global scale, and we’re reshaping all areas of the business, industry and every community that is home to a McDonald’s restaurant. We face complex tech challenges every day. But that’s where our diverse and talented teams come in. They’re made up of the best and brightest from all over the globe, and they thrive in the space where feel-good meets fast-paced.

Our Global Mexico City Office will be a hub for technology innovation and operational support to help us build the solutions that will improve our customer, crew and employee experience each and every day.

Department Overview

As a Software Development Engineer II (SDE II), you will contribute to the design, development, modernization, and support of enterprise applications that power McDonald's Global Access Management (GAM) platform.

This role focuses on building secure, scalable, and maintainable applications while balancing new feature development with modernization of existing legacy systems. You will work across both modern .NET applications and enterprise solutions built on the .NET Framework, collaborating with global engineering teams to deliver high-quality software supporting millions of users worldwide.

The ideal candidate is a strong mid-level engineer who can independently deliver medium-to-complex features, troubleshoot production issues, participate in technical design discussions, and contribute to the continuous improvement of our engineering practices.

Duties

• Design, develop, test, and maintain enterprise applications using C# and the .NET ecosystem.
• Build and maintain RESTful APIs and backend services.
• Enhance and modernize legacy applications built on .NET Framework 4.8 and ASP.NET MVC.
• Develop new applications using modern .NET (.NET 8 and future versions).
• Implement user interfaces using Razor Pages, JavaScript, jQuery, HTML, and CSS.
• Write clean, maintainable, and well-documented code following engineering best practices.
• Analyze, troubleshoot, and resolve production issues through log analysis and debugging.
• Participate in code reviews and provide constructive feedback to peers.
• Collaborate with Product Owners, Architects, QA Engineers, Security teams, and global stakeholders.
• Support production systems, including participation in L4 support activities when required.
• Assist junior engineers through technical guidance and knowledge sharing.
• Participate in Agile ceremonies including sprint planning, backlog refinement, daily standups, and retrospectives.
• Contribute to modernization initiatives that reduce technical debt while ensuring business continuity.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or related field (or equivalent professional experience).
• 3+ years of professional software development experience building enterprise applications using C# and .NET.
• Experience developing enterprise applications using C# and .NET.
• Strong experience with .NET Framework 4.8 and ASP.NET MVC.
• Experience building applications using modern .NET (.NET 8 or newer).
• Experience with Microsoft SQL Server.
• Experience developing REST APIs.
• Solid understanding of Object-Oriented Programming (OOP) principles.
• Experience working with Dependency Injection.
• Familiarity with CQRS and Event-Driven architectures.
• Experience working with Git-based source control.
• Strong debugging and troubleshooting skills.
• Ability to understand and enhance existing enterprise applications.
• Strong written and verbal communication skills.
• Ability to work independently while collaborating within distributed global teams.

Additional information
At McDonalds we are People from all Walks of Life...

People are at the heart of everything we do , and they make the McDonalds experience. We embrace diversity and are committed to creating an inclusive culture that means people can be their best authentic self in our restaurants and offices, which helps us to better serve our customers. We have a strong heritage of diversity and representation within our communities, which we are proud of. The diversity of our people, customers, Franchisees, and suppliers gives us strength.

We do not tolerate inequality, injustice, or discrimination of any kind. These are hugely important issues and a brand with our reach and relevance means we have a very meaningful role to play.

We also recognise our responsibility as a large employer to continue being active in our communities, helping to develop skills and drive aspirations that will help people to be more aware of the world of work and more successful within it, whether with McDonalds or elsewhere.