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J&M Group

Sr .Net developer

  • Montreal, QC, Canada

Contract

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Job details

Job type
Contract
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Posting language
English
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Original job description

We are looking for a Senior .NET Developer with strong C#, .NET/.NET Core, REST/SOAP APIs, application support, and OpenShift experience.

What will you do?

  • Design, develop, implement, and maintain technical solutions supporting legacy and modern .NET applications hosted on Windows 10/11, Windows Server, and cloud/container platforms, including desktop application components.
  • Analyze existing applications and recommend opportunities for modernization, technical debt reduction, code optimization, and increased automation.
  • Troubleshoot application issues, perform root cause analysis, remediate vulnerabilities, and refactor legacy code to improve application stability and maintainability.
  • Develop and support integrations between applications using REST/SOAP APIs, HTTP-based services, XML, and other enterprise integration mechanisms.
  • Document application design, technical changes, configurations, troubleshooting procedures, and implementation updates.
  • Work cross-functionally with business partners, Agile squads, infrastructure teams, and Site Reliability Engineering (SRE) teams to prioritize and successfully deliver project and operational work.
  • Participate in code reviews, testing, deployment, production support, and continuous improvement activities.
  • Communicate and interact frequently with business and technology partners located across Canada and globally.

What do you need to succeed?

Must-have

  • Minimum 5+ years of hands-on software development experience using the Microsoft .NET technology stack, including development, implementation, maintenance, and support of enterprise applications.
  • Strong experience with C#, .NET / .NET Core, and Microsoft development technologies.
  • Experience developing and supporting front-end, back-end, desktop, Windows-hosted, and cloud/container-hosted application components, including OpenShift environments.
  • Strong understanding of object-oriented programming, application design principles, and enterprise software development practices.
  • Experience with security authentication and authorization mechanisms, including OAuth, Active Directory, application certificates, and related security technologies.
  • Strong experience with HTTP, SOAP, REST APIs, and web services supporting rich-client and cloud-based applications.
  • Understanding of XML structures and data layouts to facilitate data exchange and integration between platforms.
  • Hands-on experience in application troubleshooting, debugging, root cause analysis, vulnerability remediation, and refactoring of legacy code.
  • Experience working with source control, build/deployment processes, and CI/CD practices.
  • Ability to work effectively across Agile development teams, business stakeholders, SRE, and other technology teams.
  • Strong analytical, problem-solving, documentation, and communication skills.

Nice-to-have / Secondary Skills

  • Experience or working knowledge of Java and the Spring ecosystem is an asset.
  • Familiarity with Java, Spring Boot, Spring MVC, and Java-based REST APIs/microservices.
  • Experience troubleshooting, supporting, or making enhancements to Java/Spring Boot applications is preferred.
  • Familiarity with Java development tools and frameworks such as Maven/Gradle, JUnit, JPA/Hibernate, or equivalent technologies would be beneficial.
  • Experience working within an enterprise application landscape containing a combination of .NET and Java-based applications.
  • Exposure to microservices and containerized applications using OpenShift/Kubernetes would be an asset.
  • Experience within banking, financial services, or another large enterprise technology environment would be beneficial.
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More about this job

Responsibilities

Design, develop, maintain, and support legacy and modern .NET applications across Windows, cloud, and container platforms, including desktop components. Troubleshoot and modernize applications, support API integrations, document technical work, and collaborate with business, Agile, infrastructure, and SRE teams through delivery and production support.

Requirements

Requires at least five years of hands-on Microsoft .NET development experience, including strong C# and .NET/.NET Core skills, application support, APIs, and OpenShift or other cloud/container environments. Candidates should also have experience with authentication and authorization, XML, CI/CD, troubleshooting, and cross-functional collaboration; Java and Spring experience are assets.

Skills

  • C#
  • .NET
  • .NET Core
  • REST APIs
  • SOAP APIs
  • OpenShift
  • Application Support
  • Object-Oriented Programming
  • OAuth
  • Active Directory
  • XML
  • Application Troubleshooting
  • Root Cause Analysis
  • CI/CD
  • Agile
  • Java

Visa sponsorship

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Categories

  • Software
  • Technology

Keywords

  • C#
  • .NET
  • .NET Core
  • REST APIs
  • SOAP APIs
  • HTTP
  • Web Services
  • OpenShift
  • Kubernetes
  • Windows Server
  • Windows 10/11
  • Desktop Applications
  • Cloud Applications
  • Containerized Applications
  • OAuth
  • Active Directory
  • Application Certificates
  • XML
  • Object-Oriented Programming
  • Application Modernization
  • Technical Debt Reduction
  • Vulnerability Remediation
  • Source Control
  • CI/CD
  • Agile
  • Site Reliability Engineering
  • Java
  • Spring Boot
  • Spring MVC
  • Microservices

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