Senior .NET Developer

Cognizant’s Application Delivery practice is seeking a highly qualified Lead .NET Developer(Onsite) with experience developing and building high-performing, scalable, enterprise applications. You will be part of a digital software team that works on high-demand applications. Our engineers have a passion for high-quality, reliable and maintainable code. You will work side by side with product managers, designers, and clients, making decisions together in order to quickly deliver valuable working software to clients and their users. Our engineers are agile and retrospective, and not afraid to identify what we’re doing wrong, so we can fix it, and what we’re doing right, so we can improve on it. Above all, we judge success by the success of our team and the happiness of our customers. Cognizant’s Application Delivery If you’re like us, you’ve got big ideas. At Cognizant, we’re exploring new ideas every day. We help industry leading companies reinvent their business models and innovate products that create new value—by connecting people with things, insights and experiences. Cognizant digital engineering designs, engineers and delivers digital products and experiences that drive digital-first business models. We offer the most comprehensive digital engineering expertise and client-centric methodology for sustainable innovation. Location: Toronto, ON Experience Required: 6+ years You must be legally authorized to work in Canada without the need for employer sponsorship, now or at any time in the future. Cognizant will not sponsor work authorization for this role. Role: Senior C#/.NET Developer – Roles & Responsibilities Design, develop, and maintain server-side components using C# and .NET (Core/Framework) following clean architecture and SOLID principles. Build and maintain RESTful APIs (design, versioning, pagination, error handling, and documentation) and ensure secure authentication/authorization. Develop middleware and integration components to connect internal services with external systems (message formats, adapters, routing, transformation, and orchestration). Implement and consume integrations using common patterns (sync/async), ensuring resiliency (timeouts, retries, circuit breakers) and observability (logging, tracing, metrics). Write unit/integration tests and support automated CI/CD pipelines; ensure code quality through reviews and static analysis. Troubleshoot production issues, perform root-cause analysis, and deliver performance/reliability improvements. Collaborate with product owners, architects, and QA to refine requirements, estimate work, and deliver features within sprint timelines. Produce and maintain technical documentation for APIs, integrations, configuration, and runbooks. Required Qualifications  Candidates should have over 6+ years of hands on experience in below skills  MUST Have skills - C# Developer: C#, .net experience, Server side development, REST APIs, Middleware integration,  Nice To have Skills- Relational databases, MongoDB, Redis Salary And Other Compensation Applications will be accepted until April 27, 2026. The annual salary for this position is between CAD 80,000- CAD 91,000 base depending on experience and other qualifications of the successful candidate. This position is also eligible for Cognizant’s discretionary annual incentive program, based on performance and subject to the terms of Cognizant’s applicable plans. Benefits Medical/Dental/Vision/Life Insurance Paid holidays plus Paid Time Off Long-term/Short-term Disability Paid Parental Leave Disclaimer: The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law. Travel: 0-5% Why Choose Cognizant? It takes a lot to succeed in today’s fast-paced market, and Cognizant Technology Solutions has become a leader in the industry. We love big ideas and even bigger dreams! We stand out because we put human experiences at the core. Our associates enjoy robust benefits and training opportunities from our industry-recognized, award-winning Academy team. You will have access to hundreds of technical trainings to keep your skillsets fresh and have opportunities to acquire certifications on the newest technologies. Everything we do at Cognizant we do with passion—for our clients (fortune 100 companies), our communities, and our organization. It’s the defining attribute that we look for in our people. If you love ambiguity, excited by change, and excel through autonomy, we’d love to hear from you! About Cognizant Application Delivery Well-designed ,software transcends digital technology, going beyond the fulfillment of basic requirements to focus instead on human needs. Within Cognizant Digital Engineering, we help clients develop software products that transform human insights into tangible, production-ready digital solutions. We also work with our clients to scale their native cloud applications. Using insights from the lived experiences of our consumers, we seamlessly replace traditional service strategies with engaging, precise, and direct digital applications. Designing phenomenal software is vital to success in the digital economy—and we understand that a human-centric approach is key to this design. www.cognizant.com NASDAQ: CTSH

Design, develop, and maintain server-side components and RESTful APIs using C# and .NET following clean architecture principles. Collaborate with cross-functional teams to build scalable enterprise applications and integrate internal services with external systems.

Requires over 6 years of hands-on experience in C#, .NET, and server-side development. Candidates must be legally authorized to work in Canada without sponsorship.

• Medical Insurance • Dental Insurance • Vision Insurance • Life Insurance • Paid Holidays • Paid Time Off • Long-term Disability • Short-term Disability • Paid Parental Leave

• Technical DocumentationSouhaitée
• API RESTSouhaitée
• CI/CDSouhaitée
• RedisSouhaitée
• MongoDBSouhaitée
• C++Souhaitée

Relevées dans la description du poste. Confirmez les exigences importantes ci-dessus.

• C#
• .NET Core
• .NET Framework
• REST APIs
• Middleware Integration
• Clean Architecture
• SOLID Principles
• Unit Testing
• Integration Testing
• CI/CD
• Relational Databases
• MongoDB
• Redis
• Server-side Development
• Technical Documentation

• Software
• Technology
• Engineering
• Consulting

Expérience minimale

5+ ans

Postuler avant le

4 oct. 2026

Langue de l’offre

anglais

Heures de travail

40 heures par semaine

Niveau d’expérience

Mid-Senior level