Software Engineer III – C#

Role Summary

As a Software Engineer III – C#, you will lead the design, development, and delivery of advanced customer-facing solutions within our restaurant and digital ecosystem. This role combines strong technical architecture, hands-on engineering in AWS, and mentorship to drive innovation and team capability. You will partner cross-functionally with Product, Engineering Leadership, and external teams to shape scalable platforms using modern cloud-native technologies.

Key Responsibilities

Own end-to-end technical design and architecture for backend and distributed systems, primarily built in C#/.NET and deployed on AWS.

Drive delivery of key initiatives by leading design discussions, defining implementation plans, and ensuring execution meets business goals.

Develop, test, deploy, and maintain high-performance services, APIs, and integrations using cloud-first practices.

Guide a squad in agile development, including technical decision-making, documentation, and sprint planning.

Promote engineering excellence through code reviews, CI/CD practices, automated testing, and rigorous performance monitoring.

Provide technical mentorship to junior and mid-level engineers, ensuring consistent growth and learning across the team.

Manage and reduce technical debt, while championing scalability, security, and operational efficiency.

Serve as a key point of contact for cross-team collaboration, reporting status, blockers, and alignment with product and engineering leads.

Required Qualifications

Bachelor’s degree in Computer Science, Engineering, or related technical discipline.

5+ years of professional experience in backend software development with C#/.NET.

3+ years of hands-on experience with AWS, including services like Lambda, ECS, API Gateway, DynamoDB, S3, IAM, CloudWatch, etc.

Strong experience with architecting cloud-native systems, including RESTful APIs and microservices.

Advanced understanding of software engineering principles, design patterns, system design, and agile methodologies.

Proficiency in tools such as Git, Bitbucket, Jira, SonarQube, and CI/CD pipelines (Jenkins, GitHub Actions).

Strong experience with Docker and Kubernetes (K8s) in cloud deployments.

Experience with static analysis, performance profiling, and production troubleshooting.

ADVANCED LEVEL written and spoken ENGLISH

Prederred Qualifications

Experience mentoring other engineers and conducting technical interviews.

Exposure to Terraform, Infrastructure as Code (IaC), or AWS CDK.

Familiarity with frontend or cross-platform development is a plus.

Experience integrating with third-party APIs and managing secure data flows.

Location: Calz. Gral. Mariano Escobedo 595, Rincón del Bosque, Bosque de Chapultepec I Secc, Miguel Hidalgo, 11580 Ciudad de México, CDMX, Mexico

Work Model: Full-time | Hybrid

Department: Global Technology

Company: McDonald’s Corporation