Top .NET Developer Jobs in Toronto

As a Site Reliability Engineer, you will enhance system reliability, drive incident responses, design tools for automation, and participate in on-call rotations.

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.

The Staff Frontend Engineer will lead architectural design and implementation of complex frontend systems, enhancing user experience with strategic execution and rigorous quality control.

As a Senior Backend Developer, you will lead backend development for financial technology solutions, utilizing .NET and Azure technologies, mentor team members, and ensure code quality through best practices and automated testing.

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.

Senior .NET Integration Developer responsible for L3 support and integration of 20+ vendor tax applications, performing systems analysis, development, testing, deployment, and stakeholder consultation. Develop .NET and SQL Server code/scripts, lead feasibility and risk assessments, define operating standards, coach junior analysts, and ensure security and compliance.

Design, implement, test, deploy, and maintain scalable, secure full-stack software. Lead technical design, CI/CD, containerized deployments, messaging systems, databases, code reviews, pair programming, and cross-team collaboration while mentoring and occasionally leading the team.

Design, develop, test, deploy and support enterprise-grade .NET applications and RESTful APIs. Provide technical leadership, mentor team members, produce design artifacts and documentation, and participate in integration, testing and deployment activities while ensuring compliance with standards.

Lead design and implementation of high-scale backend systems powering real-time reservation availability. Drive product features and infrastructure upgrades, build and optimize microservices for multi-data-center scalability, enforce reliability through automated testing, collaborate via code reviews and pair programming, and adopt AI technologies responsibly.

The .Net Developer will lead development projects, work with offshore teams in Agile, and utilize .NET technologies for web applications.

.NET Developer Lead responsible for programming projects using .NET version 4.5 and integrating with Genesys platforms while ensuring effective communication and documentation.

Design and implement front-end web applications by converting .NET UI elements to React/HTML5 using Citi standard components. Deliver timely front-end design and code, perform automated testing, integrate with APIs, analyze complex problems, advise stakeholders, mentor junior staff, and ensure security, compliance, and operational support across development lifecycle.

Senior .NET/C# engineer responsible for full-stack development, systems administration, performance and stability improvements, solution design/implementation, CI/CD, testing, incident management, and technical leadership within a securitization capital markets team.

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.

Design, build, and optimize high-performance .NET Core backend microservices in a distributed system. Implement observability (tracing, metrics, logging), optimize PostgreSQL and service-to-service communication, maintain CI/CD, support deployments (blue/green, canary), collaborate with DevOps/QA/frontend, troubleshoot production issues, and contribute to architecture and best practices for service resilience and scalability.

Develop and maintain full-stack applications for Fixed Income trading and risk management, collaborating with traders and analysts for innovative solutions.

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 maintain scalable web applications using .NET technologies and Azure. Responsibilities include designing user interfaces, building RESTful APIs, and ensuring application performance.

Design, develop, and support scalable enterprise web applications using the Microsoft stack. Build RESTful APIs, optimize SQL Server databases, implement microservices, ensure code quality through unit testing and CI/CD, collaborate with cross-functional teams, troubleshoot production issues, and follow Agile SDLC and DevOps practices.

Design, build, and optimize server-side logic and scalable RESTful APIs. Maintain databases, write unit/integration tests, refactor legacy .NET 4.8 code, implement data security, and collaborate with product, front-end, and QA teams to deliver reliable solutions.

Lead design, develop, and maintain high-performance backend services and APIs (C#/.NET, C++). Support real-time, low-latency trading systems, integrate with MS/Azure SQL, streaming/messaging (Kafka/Aeron/Solace), and hybrid on-prem/Azure environments. Drive architecture, production support, CI/CD, observability, and collaboration with trading stakeholders.