Senior C#/.NET Backend Engineer – Modernization

Insight Global; Toronto; On-site; CAD 120,000 - 150,000; Full time

Job summary

Insight Global is seeking a Senior C#/.NET Developer to support a large-scale application modernization within a Capital Markets technology environment. You will redesign a legacy backend platform, drive automation, and collaborate with business and technology stakeholders to deliver scalable solutions.

You will work on complex backend systems using C#/.NET, participate in design and development, and contribute to modernization efforts through RESTful APIs, microservices, and SOLID practices.

Qualifications

• 5+ years of experience developing applications with C# and .NET.
• Experience with .NET Core and backend application development.
• Strong knowledge of SQL Server and database design concepts.
• Experience designing and developing RESTful APIs and microservices architectures.
• Strong understanding of unit testing methodologies and SOLID design principles.
• Ability to analyze and modernize complex legacy systems.
• Excellent verbal and written communication skills with experience collaborating across multiple teams.
• Experience gathering requirements and working directly with business stakeholders.
• Proven ability to work on enterprise-scale application development projects.
• Bachelor's degree in Computer Science, Software Engineering, or a related technical field.
• Experience within banking, financial services, or capital markets environments.
• Exposure to Agile development methodologies.
• Experience with Azure development or cloud-based architectures.
• Knowledge of MongoDB or WPF.
• Experience supporting application modernization, automation, or AI-focused initiatives.

Responsibilities

• Design, develop, enhance, and maintain backend applications using C# and .NET technologies.
• Analyze existing legacy systems and contribute to redesign and modernization initiatives.
• Build automation capabilities and improve straight-through processing (STP) workflows.
• Collaborate with business analysts and business stakeholders to translate requirements into technical solutions.
• Participate in application architecture, system integration, and technical design discussions.
• Perform code reviews and contribute to development best practices and coding standards.
• Develop and consume RESTful APIs and microservices-based solutions.
• Create and execute unit tests while adhering to SOLID design principles.
• Support application delivery throughout the full software development lifecycle.
• Work cross-functionally with development, support, and business teams to ensure successful project execution.

Skills

C#/.NET

.NET Core

SQL Server

RESTful APIs

Microservices

SOLID principles

Unit testing

Communication

Agile

Azure

MongoDB

WPF

Education

Bachelor's degree in Computer Science/Software Engineering or related field

Tools

Azure

MongoDB

WPF

Job description

Insight Global is seeking a Senior C#/.NET Developer to support a large-scale application modernization within a Capital Markets technology environment. You will redesign a legacy backend platform, drive automation, and collaborate with business and technology stakeholders to deliver scalable solutions.

You will work on complex backend systems using C#/.NET, participate in design and development, and contribute to modernization efforts through RESTful APIs, microservices, and SOLID practices.