Senior Application Support & Development Engineer (.NET & MongoDB)

We are seeking a Senior Application Support & Development Engineer with 7+ years of experience and strong hands-on expertise in .NET, Microsoft Azure, and MongoDB. These three technologies are mandatory for the role. The position combines application development, production support, operational maintenance, cloud services, and technology lifecycle activities across a large enterprise software landscape.

The ideal candidate will demonstrate end-to-end ownership, a strong support attitude, a ticket-driven mindset, and the ability to troubleshoot complex issues across application, API, cloud, integration, and database layers.

In this role, you will

• Design, develop, enhance, and maintain enterprise applications using C#, .NET Core / .NET 6+, ASP.NET Core, REST APIs, Azure services, and MongoDB.
• Build scalable backend services and APIs while following secure coding, performance, and maintainability standards.
• Maintain a support-first and customer-focused mindset while balancing development priorities.
• Provide production support and troubleshoot application, API, database, cloud, integration, and deployment issues.
• Respond effectively to production priorities and work within defined incident, change, release, and security processes.
• Take end-to-end ownership of incidents, service requests, defects, enhancements, and operational tasks.
• Perform root-cause analysis for recurring issues and implement corrective and preventive solutions.
• Develop and optimize MongoDB queries, aggregation pipelines, indexes, and data access patterns.
• Configure, deploy, monitor, and support workloads hosted on Microsoft Azure.
• Support CI/CD pipelines, automated deployments, release activities, and post-production validations using Azure DevOps and Git.
• Participate in Technology Lifecycle Management activities, including framework upgrades, package upgrades, patching, and platform modernization.
• Support vulnerability remediation, dependency upgrades, secure configuration, and compliance-related activities.
• Perform software installation, uninstallation, configuration, environment maintenance, and operational readiness activities as needed.
• Create and maintain technical documentation, support procedures, knowledge articles, release notes, and operational runbooks.

Work model:

We strive to provide flexibility wherever possible. Based on this role’s business requirements, this is a remote position open to qualified applicants in Canada. Regardless of your working arrangement, we are here to support a healthy work-life balance through our various wellbeing programs.

Note: The working arrangements for this role are accurate as of the date of posting. This may change based on the project you’re engaged in, as well as business and client requirements. Rest assured; we will always be clear about role expectations.

What you need to have to be considered:

• 7+ years of overall experience in application development, maintenance, enhancement, and production support.
• Strong hands-on expertise in C#, .NET Framework, .NET Core / .NET 6+, ASP.NET Core, and RESTful Web APIs.
• Strong hands-on experience with Microsoft Azure services, cloud-native application development, deployment, monitoring, and troubleshooting.
• Strong hands-on experience with MongoDB, including data modeling, schema design, aggregation pipelines, indexing, query optimization, and performance troubleshooting.
• Demonstrated experience supporting enterprise applications in production environments.
• Experience managing incidents, service requests, defects, changes, and operational tickets through closure.

These will help you stand out

• Experience with microservices and event-driven architecture.
• Exposure to Docker, Kubernetes, or Azure Kubernetes Service.
• Experience with PowerShell or other automation scripting.
• Knowledge of DevSecOps practices and code-quality or security-scanning tools such as SonarQube.
• Experience in healthcare, insurance, or other large enterprise application environments.
• Relevant Microsoft Azure certification, such as Azure Developer Associate or Azure Administrator Associate.

We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.

Total compensation:

We regularly assess market data to ensure we offer a competitive compensation package for our associates. The base salary for this position ranges between CAD 70,000 - 95,00 per year. Where the successful candidate may fall within the range depends on relevant education, work and/or management experience and other business-related and job-necessary qualifications. This position is also eligible for Cognizant’s discretionary annual performance-based bonus, as well as benefits that support your physical, mental and financial wellbeing.