Top .NET Developer Jobs in Toronto

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.

Design, implement, and maintain backend services and web applications on a Microsoft stack; build front-end features with React; write well-tested, secure code; collaborate with product and design; participate in code reviews and improve CI/CD/DevSecOps pipelines.

Design, develop, test, maintain and re-architect web and mobile applications using .NET/C#. Build and maintain SQL Server databases and BI components, support production, ensure security, document architecture, lead technical decisions, and mentor team members.

Lead and grow backend engineering teams powering OpenTable's Diner Platform. Own technical direction, architecture, and reliability of distributed, high-scale reservation and availability systems. Translate product goals into execution plans, drive incident response and operational excellence, and collaborate across Product, Design, and platform teams to deliver scalable, low-latency services.

Build and maintain scalable, cloud-native APIs using .NET. Enhance core platform components, lead architecture and testing discussions, optimize telemetry and performance, collaborate cross-functionally, conduct code reviews, and mentor team members.

Lead and implement .NET/Azure projects, design solutions, build and review code, maintain Azure CI/CD pipelines and ARM templates, mentor and manage onsite/offshore developers, handle L2/L3 support, incident and change management, and engage with stakeholders and customers.

The Senior .Net Developer will enhance SDG's C#/.NET Core codebase, design high-load services, and optimize MS SQL queries, benefiting from a remote work environment and attractive benefits.

Design and build scalable .NET backend services and gRPC microservices; optimize data layers (SQL Server, MongoDB, Elasticsearch); implement cloud integrations on AWS and Azure; ship AI/ML features (LLMs, RAG, vector search, ranking, personalization) and operate MCP servers; contribute to CI/CD, observability, containerization, and production ML integrations impacting high-traffic consumer marketplaces.

Lead applications analysis and development efforts, design and enforce coding/testing standards, resolve complex business and system issues, ensure architecture compliance, define system enhancements, manage implementations and projects, coach mid-level developers, and drive risk/compliance awareness.

Own the BusPlanner mobile application portfolio across Android and iOS using .NET MAUI and C#. Build supporting .NET REST APIs, integrate ruggedized tablets and peripherals, manage signing and store releases, maintain push notifications, and provide production support. The role also contributes to GPS, ridership, scanning, dispatch, and adjacent transportation platform features while working autonomously in a small team.

Own full-cycle sales for net-new Workday implementation deals globally: prospect, qualify, negotiate, and close high-value professional-services contracts while building C-level relationships and maintaining a high outbound activity pace.

Develop .NET applications and provide Unix/AIX and Windows server administration. Perform shell scripting, database work (SQL Server, Progress), reporting support, and liaise with business users. Provide customer support, adapt to change, and work cross-functionally.

Develop and maintain C#/.NET applications using WCF, AJAX, and SQL Server. Toronto-based permanent role, start ASAP. Work on backend and integration components within the .NET technology stack.

PERM .NET Developer role in Toronto to build and maintain C#/.NET applications and services using WCF, AJAX, and SQL Server. Start ASAP.

Design and develop scalable applications in a team-based Agile environment, collaborating with cross-functional teams and utilizing cloud platforms.

Design, build, and ship production-grade distributed features within cross-functional agile teams. Contribute to architecture, prototype solutions, write automated tests, debug and profile distributed systems, resolve defects, coordinate technical dependencies, perform code reviews, and share knowledge to improve product quality and team practices.

Responsible for leading programming efforts, mentoring teammates, and developing robust, cloud-based applications using modern technologies and methodologies.

As a Sr. Software Engineer, you'll design and develop features for a SaaS platform, collaborate with teams, tackle technical problems, and ensure high-quality solutions with an ownership mindset.

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, develop, integrate, and maintain scalable web applications and backend services using .NET Core and Python. Build RESTful APIs and microservices, optimize database queries, implement security and authentication, support CI/CD and cloud deployments, participate in Agile/Scrum, perform testing and performance tuning, and produce technical documentation.

Lead architecture and delivery of cloud-native .NET systems for mission-critical nuclear workflows. Design scalable, resilient distributed applications, own CI/CD and deployment pipelines, drive technical roadmap, and raise engineering standards through code reviews, reliability practices, and cross-functional collaboration.

Lead-level .NET developer role requiring 10+ years of experience. Senior/Lead .NET development, design and implementation of applications, and team leadership on a 6+ month contract. Interviews via phone and Skype.