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Added 1 day ago
GR
Co-op Java Developer - Winter 2027
Global Relay
Vancouver, BC
- Full-time
This is a Java Developer Co-op position within Global Relay’s software development team.
Added 1 day ago
M
Full Stack Engineer
Manulife
Toronto, ON · Waterloo, ON
- Full-time
Languages and runtimes: Java or TypeScript/JavaScript, Node.js and SQL.
Added 1 day ago
F
Senior Software Engineer (AI & Full Stack)
Fable
Remote, Canada
- $130,000 to $150,000 CAD / year
- Full-time
- Remote
Improve developer experience through automation, tooling, and reusable engineering patterns.
Added 1 day ago
AI
QA Automation Engineer – Selenium & Playwright
Astra-North Infoteck Inc. ~ Conquering today’s challenges, achieving tomorrow’s vision!
Toronto, ON
- Full-time
Build and enhance scalable automation frameworks using Java/JavaScript/TypeScript.
Added 1 day ago
TC
Java Spring Boot Developer
Tata Consultancy Services
Canada
- Full-time
We are seeking an experienced Java Developer with strong expertise in Java, Spring Boot, REST APIs, and Struts, along with hands-on exposure to Generative AI and AI-enabled application…
Added 1 day ago
N
Software Developer - Cloud Platform
Nakisa
Montreal, QC
- Full-time
As a Software Developer on our Platform Engineering team, you will help design, build, and maintain the cloud-native services and tools that power Nakisa's product portfolio for Fortune…
Added 1 day ago
D
Java Full Stack Developer
Dexian
Mississauga, ON
- $55 to $85 CAD / hour
- Contract
We are seeking a highly motivated and experienced Senior Java Developer to join our dynamic team focused on enhancing developer productivity. Our mission is to build and maintain…
Added 1 day ago
M
Kafka Platform Administrator / Kafka Developer
Manpower
Calgary, AB
- Contract
Role: Kafka Platform Administrator / Kafka Developer
Added 1 day ago
AI
QA Automation Engineer – Selenium & Playwright
Apptoza Inc.
Toronto, ON
- Contract
Build and enhance scalable automation frameworks using Java/JavaScript/TypeScript.
Added 1 day ago
Fullstack Java Developer
Capgemini
Toronto, ON
Build scalable APIs and microservices using .NET Core, Java Spring Boot, or Node.js.
Added 1 day ago
PG
Senior Application Security Engineer
Paymentus Group Inc
Richmond Hill, ON
- Full-time
Review source code and application design for services written primarily in Java, NodeJS, Python, and Golang.
Added 1 day ago
AI Security Engineer, AWS Security - AISec
Amazon
Vancouver, BC · NS
You will perform manual and automated code review, primarily in Java, Python, and JavaScript
Added 1 day ago
D
Java / Python Engineer
Dexian
Mississauga, ON
- $60 to $65 CAD / hour
- Contract
Position Name - Senior Java Software Engineer
Added 1 day ago
SI
Java Software Engineer
Smart IT Frame LLC
Mississauga, ON
- Full-time
Seeking a Senior Java Developer to design, build, and optimize high-throughput, low-latency event-driven microservices for enterprise trading platforms.
Added 1 day ago
JG
Sr .Net developer
J&M Group
Montreal, QC
- Contract
We are looking for a Senior .NET Developer with strong C#, .NET/.NET Core, REST/SOAP APIs, application support, and OpenShift experience.
Added 1 day ago
AC
Back-end Developer – Proactive Hiring
Air Canada
Toronto, ON · Dorval, QC
- Full-time
We’re seeking a creative and detail-oriented Back-end developer to play a critical role in ensuring our systems operate seamlessly behind the scenes by designing, building, and maintaining…
Added 1 day ago
Z
Java Lead - Capital Market or investment -10+ Years Must
Zoho
Toronto, ON
- Contract
Full stack Java + Spring Developers with some experience on React + Camunda ( Preferred)
Added 1 day ago
Q
Software Engineer - XR
Quectel
Richmond, BC
- $80,000 to $135,000 CAD / year
- Full-time
Proficiency in C & C++ programming, as well as Java or system scripting languages.
Added 1 day ago
P
Data Integration Engineer
Prophix
Toronto, ON · Etobicoke, ON
- Full-time
Hands-on experience with SnapLogic or Java web services for application integration.
Added 2 days ago
T
Sr. Business Systems Analyst (Nodejs, Java and E-signature Platforms)
TD
Toronto, ON
- Full-time
Added 2 days ago
MC
Senior Software Developer
Meridian Credit Union
St. Catharines, ON · Toronto, ON · Etobicoke, ON
- Full-time
Experience with ObjC, Swift, Java, Kotlin ( Nice to have)
Added 2 days ago
Principal System Engineer
Backbase
Toronto, ON
Java & Performance Tuning: Strong ability to read, modify, and optimize Java/Spring Boot microservices. You bring hands-on expertise in JVM memory tuning, heap sizing, and Garbage…
Added 2 days ago
C
VP Senior Core Java Lead
Citi
Mississauga, ON
- Full-time
The Senior Core Java Lead is responsible for accomplishing results through the management of a team or department in an effort to establish and implement new or revised application systems…
Added 2 days ago
Y
Software Engineer - QC(Local)
Yochana
Montreal, QC
- Contract
We are seeking a Software Engineer with strong Java development experience to support the security, modernization, and reliability of enterprise applications and file transfer platforms.…
Added 2 days ago
AI
Quality Engineer (QE) / SDET – AI Chatbot Validation
Apptoza Inc.
Toronto, ON
- Contract
Design, develop, and maintain scalable test automation frameworks using Java, Python, or Groovy.

J&M Group

Sr .Net developer

Montreal, QC, Canada

Contract

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Job details

Job type: Contract
Apply by: May 2, 2027
Posting language: English
Posted: Nov 3, 2026

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.

Apply About employer

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

Not detected in the job text

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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