Senior .NET Developer; C#, Java)

Position: Senior .NET Developer (C#, Java)
Location: Montreal

In just three decades, ALTEN has become a global leader in Research & Development, Engineering, IT Services, Life Sciences, and Network Services. With a presence in more than 30 countries and a team of over 60,000 employees, we are trusted by industry leaders worldwide to deliver pioneering solutions and drive technical excellence.

ALTEN CANADA , a proud subsidiary of ALTEN headquartered in France, is dedicated to serving the Canadian market. With offices in Montreal and Toronto, we combine global expertise with local insight to accelerate innovation across Canada.

At  ALTEN CANADA , our consultants thrive on solving complex, highly technical challenges across diverse industries. From Life Sciences to Energy, Automation to Manufacturing, Aviation, Defense. Automotive, Rail and Transportation to Information Systems and Telecommunications, our unwavering commitment to excellence shaping the future of technology and industry.

About the Opportunity
We are seeking a  Senior Backend Developer (.NET / Java)  to support a large-scale application security remediation and modernization initiative across a portfolio of legacy enterprise applications.

This role focuses on enhancing, securing, and modernizing approximately 10-15 backend applications currently running on legacy .NET 4.6 technologies. The successful candidate will play a key role in vulnerability remediation, framework upgrades, dependency modernization, and application migration activities within a highly regulated financial services environment.

This is an excellent opportunity for an experienced developer who enjoys solving complex technical challenges, modernizing legacy systems, and improving application security.

What You'll Do
Implement application changes across  Java and C#/.NET  components supporting the mobile work-intake process
Integrate requests submitted through the mobile channel with the existing workflow applications and downstream processing systems
Maintain and enhance  Crystal Reports  components used to generate confirmations, statements, and PDF reports accessible to customers
Contribute to the modernization of legacy  Java, Tomcat, and .NET applications  and dependencies
Perform hands-on end-to-end development, unit testing, troubleshooting, code reviews, and technical documentation

Required Qualifications
7+ years of genuine hands-on software development experience, with the ability to deliver development work end to end
Strong Java development experience; experience with Java 1.7/1.8 or more recent versions is acceptable
Strong 7+ years of hands-on development expertise in C# and .NET
Crystal Reports experience, including the .NET component
Proven experience migrating or modernizing legacy applications, frameworks, or application-server environments
Previous experience in financial services, asset management, investment management, banking, or a comparable regulated financial environment

Nice to Have
Experience working on mobile application or digital application projects

Experience with application security remediation and vulnerability mitigation

Experience with Tomcat; versions 8, 9, 10, or 11 are relevant
Tools / software / methodology / certification:
Java, C#, .NET, Crystal Reports, Tomcat

Soft skills:

Team player, collaborative, adaptable, proactive, and comfortable working with evolving technical requirements

Technical Environment
Core Technologies
C#
Crystal Reports
Java
Oracle Database

ALTEN Canada fosters a dynamic, collaborative work environment where every team member is empowered to reach their full potential. We are deeply committed to investing in our people by offering meaningful experiences and supporting continuous learning, growth, and career development

At  ALTEN Canada , your skills are celebrated, your ambitions…