Top .NET Developer Jobs in Toronto

Develop and support full-stack .NET solutions for TD’s securitization technology platform. Responsibilities include C# development, UI and application services, systems administration, testing, troubleshooting, incident management, performance and stability improvements, security practices, solution design and implementation, and post-production support. The engineer will collaborate with business and technology stakeholders, contribute to project planning, guide team members, and support complex capital markets applications.

Develop and maintain enterprise-scale full-stack applications for CIBC’s Regulatory Technology Client Data Services team. Responsibilities include designing technical infrastructure, building .NET and database solutions, integrating backend systems, developing technology roadmaps, leading complex projects, conducting code reviews, and mentoring peers. The role uses C#, SQL Server, Azure Databricks, React, microservices, REST APIs, and test-driven development in a hybrid Toronto environment.

Leads the design, development, maintenance, and technical direction of a scalable insurance SaaS platform. Works across .NET back-end and Vue/React front-end technologies, optimizes performance, enforces coding and security standards, leads code reviews, resolves bugs, and mentors developers. Collaborates with product, design, and engineering teams on architecture, requirements, testing, cloud infrastructure, microservices, and continuous platform improvement.

Designs and leads enterprise application architecture across .NET, React, and Azure. Responsibilities include defining technical strategies and roadmaps, guiding engineering teams, designing cloud-native systems and APIs, supporting production applications, and improving reliability, observability, performance, security, and scalability. The role also involves stakeholder engagement, technical leadership, mentoring, consulting, distributed-team collaboration, and adoption of AI-assisted development tools such as GitHub Copilot and Claude.

Lead development of secure, scalable digital banking software across front-end and backend systems. Design Angular or React applications, build APIs, optimize SQL performance, integrate third-party platforms, improve code quality, implement testing strategies, and mentor engineers. Collaborate with cross-functional teams in an Agile environment while supporting cloud-native practices, regulatory compliance, and continuous product improvement.

Leads architecture, development, modernization, and lifecycle management for cross-platform mobile applications using .NET MAUI, Xamarin, C#, and XAML. Owns migration from Xamarin.Forms, platform-specific performance, API and SDK integrations, secure storage, offline synchronization, CI/CD, app deployment, coding standards, and architecture reviews. Mentors engineers and collaborates with product, UX/UI, backend, QA, and other stakeholders to deliver reliable Android and iOS applications.

The role involves developing, testing, and maintaining software systems, collaborating with cross-functional teams, and mentoring junior developers while ensuring high code quality.

Design, build, and own integrations between a fintech platform and ERP or accounting systems. Develop REST and SOAP services, synchronization and reconciliation workflows, data mappings, validation, retries, audit trails, and observability. Improve reliability and performance, troubleshoot production failures, and collaborate with onboarding, support, engineering, and non-technical stakeholders. The role requires strong C#, .NET, SQL Server, messaging, and financial-system integration experience, with opportunities to use Azure and AI-assisted development tools.

Lead high-net-worth life and critical illness underwriting for large cases ($5M–$10M), mentor senior underwriters, perform complex medical/financial/lifestyle risk assessments, exercise signing authority, negotiate reinsurance, and present underwriting rationale to advisors and firms.

Designs, develops, and maintains enterprise applications using C# and .NET. Builds Azure cloud-native solutions, workflow automation systems, high-volume processing engines, and SQL Server/Azure SQL databases. Participates in code reviews, CI/CD development, application modernization, and cloud transformation initiatives while collaborating with stakeholders, architects, and development teams.

Design, develop, and maintain scalable .NET and React applications and secure RESTful APIs. Implement authentication/authorization (JWT, OAuth2), containerize with Docker, contribute to CI/CD, code reviews, and documentation, and responsibly use AI-assisted development tools to improve productivity and quality.

Build and maintain full-stack enterprise SaaS features using .NET and Svelte or React. Design REST APIs and data models for Cosmos DB, SQL Server, and PostgreSQL. Collaborate with customers and internal teams to solve Microsoft Teams, telephony, and compliance challenges. Prototype, ship, iterate from feedback, and evaluate emerging technologies such as voice and text bots.

Leads end-to-end modernization from a monolith to microservices, including legacy analysis, architecture, estimation, data migration, deployment, and production support. Guides .NET services, databases, messaging, containerization, and frontend integrations. Acts as the technical escalation point for complex issues while improving Jira tracking, estimation accuracy, QA collaboration, release predictability, and engineering processes. Manages and develops the team through one-on-ones, performance reviews, feedback, and career-focused objectives.

Lead design and development of scalable, cloud-native financial and reconciliation systems on GCP. Own architecture, drive technical decisions, mentor engineers, embed AI and automation, collaborate with product and QA, and ensure reliability, performance, and test automation.

Design, develop, test, deploy, and maintain scalable web applications using Angular, .NET, and SQL Server. Participate throughout the software development lifecycle, collaborate with developers, designers, and stakeholders, follow coding and security standards, improve development processes, and stay current with Angular and .NET technologies. The role also involves RESTful API development, Git source control, Agile methodologies, and potentially Java, Elasticsearch, and Kafka.

Support C# and .NET applications hosted on AWS by troubleshooting production issues, delivering enhancements, managing CI/CD pipelines with GitHub Actions, overseeing deployments, renewing SSL/TLS certificates, maintaining operational stability, and implementing cloud cost-optimization initiatives.

Develop and maintain full-stack SaaS features on a cloud platform using C#, ASP.NET, and React. Collaborate with team leads on design, testing, CI/CD, and documentation. Apply DDD, microservices, and scalable patterns; mentor engineers and promote best practices. Support AI-assisted development workflows and work with international, remote teams.

Cygnus Professionals Inc. is hiring .NET Developers and other IT professionals to provide solutions and onsite services to customers.

Cygnus is seeking .NET and Java Developers to contribute to its information technology and consulting projects, ensuring customer satisfaction and quality service.

Cygnus is looking for experienced .NET and Java developers to join their team in the USA. Candidates should be dedicated to customer success and possess a strong value system.

Cygnus is seeking .Net Fullstack Developers to aid in IT consulting and deliver excellence to customers, emphasizing commitment and ownership.

Cygnus Professionals Inc. is hiring experienced .NET and JAVA developers for their IT Solutions Division. Candidates will provide onsite services and work in various technologies mentioned.

Develop and support enterprise .NET applications using C#, ASP.NET, .NET Core, Web API, Blazor WebAssembly, and Entity Framework. Build RESTful services, write unit tests, debug production issues, integrate Azure authentication solutions, and deliver secure, accessible AODA-compliant applications. Collaborate with developers, QA, architects, and business stakeholders throughout Agile delivery and release cycles.

Lead design and delivery of cloud-native .NET APIs on Azure, drive architecture (Clean Architecture, CQRS, DDD), operate Kubernetes-deployed services, optimize SQL Server/EF Core performance, adopt AI development tools, mentor engineers, perform security-focused code reviews, and troubleshoot production issues.

Design, build, and maintain scalable full-stack web applications using Python, .NET and modern frontend frameworks. Develop REST APIs, integrate AI/ML or LLM capabilities, work with relational/NoSQL databases, deploy to cloud environments, optimize performance, and ensure security and quality through testing, code reviews, and collaboration with cross-functional teams.