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Senior Developer Canada, Toronto Jobs (On-site work)

28 Job Offers

Senior Software Developer
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Senior Software Developer sought for an enterprise-level contract in Toronto. This onsite role involves leading ERP enhancements, specializing in Oracle EBS R12.2 customization, advanced SQL/PL/SQL, and Java/OAF development. You will optimize financial module table structures, build scalable data...
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Canada , Toronto
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Not provided
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Randstad
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Senior Software Developer
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Senior Software Developer role in Toronto, Canada, seeking 8+ years of experience. Master the Microsoft .NET Framework to build secure, scalable B2B and B2C web applications. Lead cloud-based service deployment, optimize MS SQL Server databases, and integrate modern digital platforms. Ideal for e...
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Canada , Toronto
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546.97 - 582.68 USD / Day
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Randstad
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Senior Full Stack .NET Developer
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Senior Full Stack .NET Developer role in Toronto, Canada. Seeking a veteran with 8+ years in .NET, C#, VB.NET, and Java to architect and scale enterprise applications. You will modernize legacy systems, optimize MS SQL databases, and manage IIS deployments. Join a dynamic team driving high-perfor...
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Canada , Toronto
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Not provided
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Randstad
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Senior Salesforce Developer
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Senior Salesforce Developer sought to architect secure, scalable solutions on the Force.com platform in Toronto or Vancouver. Leverage Apex, Lightning Web Components, and APIs to drive enterprise integrations and enhance Sales, Service, and CPQ clouds. Mentor junior developers while delivering hi...
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Canada , Toronto, Ontario; Vancouver, British Columbia
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98400.00 - 137800.00 CAD / Year
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Hootsuite
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Senior Business Intelligence Developer
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Senior Business Intelligence Developer needed in Toronto to lead enterprise reporting modernization. Design semantic layers, schemas, and interactive Power BI dashboards using Microsoft Azure and Synapse. Requires 5+ years of Power BI architecture experience and strong data modeling skills. Benef...
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Canada , Toronto
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65.12 - 71.80 USD / Hour
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Randstad
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Senior Full Stack Developer
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Senior Full Stack Developer needed for an enterprise contract in Toronto. Lead end-to-end development with .NET 9, Blazor, and Azure cloud, building PWAs and big data pipelines. Requires 5+ years in C#, Python, and JavaScript, plus expertise in cloud data architectures. Work onsite with a modern ...
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Canada , Toronto
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Not provided
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Randstad
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Senior Software Developer
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Senior Software Developer sought for an enterprise contract in Toronto, leading GIS-driven application design and engineering. You will bridge 3-tier architectures with spatial platforms, developing scalable web-mapping services using ArcGIS, Python (ArcPy), and .NET. This onsite role demands exp...
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Canada , Toronto
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Not provided
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Randstad
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Senior Software Developer - CRM
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Senior Software Developer – CRM needed for an 11-month contract in Toronto. You will design and implement Oracle Siebel IP18+ solutions, focusing on Open UI, EIM/EAI integration, and OBIEE/PowerBI reporting. Requires 3+ years of Siebel experience, certification, and expertise in HTML5, CSS, jQuer...
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Canada , Toronto
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543.70 - 579.46 USD / Day
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Randstad
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Senior Full Stack Developer (DevOps | Go | React)
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Senior Full Stack Developer (DevOps | Go | React) at Betstamp in Toronto. Join a fast-growing sports betting startup to lead infrastructure, build blazing-fast APIs in Go, and craft modern UIs in React. You’ll own end-to-end features, optimize Postgres queries, and integrate external APIs. Enjoy ...
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Canada , Toronto
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Not provided
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Betstamp
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Senior Front End Web Developer
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Senior Front End Web Developer sought in Toronto to design advanced React components and lead AI-driven web solutions. Requires 5+ years’ experience with HTML5, CSS3, JavaScript, CI/CD pipelines, and testing automation (Jest, Playwright). Key duties include A/B testing, cross-functional collabora...
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Canada , Toronto
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132000.00 - 155200.00 CAD / Year
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Intuit
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Senior Software Developer
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Senior Software Developer with 5+ years of enterprise experience sought for a Toronto-based role. You will design and extend Microsoft Dynamics 365 CE and F&O, building integrations and scalable data flows using C#, JavaScript, and Power Platform. Key requirements include expertise in Dataverse, ...
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Canada , Toronto
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Not provided
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Randstad
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Senior Software Developer - ETL
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Senior Software Developer – ETL needed in Toronto to lead Azure data lakehouse migration for the OPGT Modernization program. You will design automated pipelines in Azure Synapse, integrate Dynamics 365 CE/F&O data, and migrate documents to OpenText. Requires 5+ years ETL experience, Azure Synapse...
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Canada , Toronto
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Not provided
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Randstad
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Senior Software Developer - ETL
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Senior Software Developer – ETL needed in Toronto to lead Azure data lakehouse migration for the OPGT Modernization program. You will design automated pipelines in Azure Synapse, integrate Dynamics 365 CE/F&O data, and migrate documents to OpenText. Requires 5+ years ETL experience, Azure Synapse...
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Canada , Toronto
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Not provided
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Randstad
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Senior Software Developer - Full Stack
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Senior Full Stack Developer needed for a 10-month contract in Toronto, Canada. You will build and govern a scalable Design System using React, Angular, and Next.js. Key requirements include expertise in Figma, WCAG/AODA compliance, REST APIs, and OAuth. This role offers the chance to lead CI/CD p...
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Canada , Toronto
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Salary
565.97 - 601.35 CAD / Day
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Randstad
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Senior Software Developer
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Senior Software Developer role in Toronto, Canada. You will lead the development of high-performing applications, optimizing code across multi-tier J2EE platforms and cloud analytics. Mastery of Oracle databases, complex SQL, and Microsoft Databricks dashboards is essential. This position offers ...
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Canada , Toronto
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Not provided
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Randstad
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Senior Software Developer - Full Stack
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Senior Full Stack Developer sought in Toronto to lead enterprise web architecture for the DDR project. Requires 10+ years in J2EE, Spring Framework, and DevOps with IBM UrbanCode. Build high-performance React frontends and resilient RESTful/SOAP APIs. Drive automated deployment and full-stack imp...
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Canada , Toronto
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Not provided
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Randstad
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Senior Software Developer
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Senior Software Developer needed for a 4-month onsite contract in Toronto. Leverage 8+ years of .NET and full SDLC expertise to support B2B/B2C web applications. Key duties include application support, testing, and deployment. Earn a competitive industry rate while utilizing skills in SQL, JavaSc...
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Location
Canada , Toronto
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Salary
546.97 - 582.68 USD / Day
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Randstad
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Senior Software Developer - API
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Senior Software Developer - API needed for a 12-month onsite contract in Toronto. You will design and build RESTful APIs, convert SOAP to REST, and develop with Node.js, Next.js, React, and TypeScript. Must have Agile experience and cloud platform skills (Azure). Earn a competitive rate of $543.7...
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Location
Canada , Toronto
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Salary
543.70 - 579.46 CAD / Day
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Randstad
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Senior Software Developer - Back End
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Senior Software Developer - Back End needed for a 12-month onsite contract in Toronto. Leverage 3+ years of expertise in .NET/C#, React, and Power BI to customize and build Dynamic CRM solutions. Key responsibilities include developing workflows, plugins, and Power Automate flows, plus managing s...
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Canada , Toronto
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Not provided
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Randstad
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Salesforce Senior Developer
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Join our Toronto team as a Salesforce Senior Developer in a full-time, onsite role. Design and implement scalable CRM solutions using Apex, LWC, and APIs. We seek an expert in Salesforce development, integrations, and Agile methodologies. Apply your skills in a collaborative environment to enhanc...
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Canada , Toronto
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138000.00 USD / Year
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Realign
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About the Senior Developer role

Senior Developer Jobs represent the pinnacle of technical expertise and leadership within software engineering teams. Professionals in these roles are seasoned experts who not only write high-quality code but also architect complex systems, guide technical strategy, and mentor less experienced engineers. They are the crucial bridge between high-level business objectives and practical, robust technical implementation, ensuring that software solutions are scalable, secure, and aligned with long-term organizational goals.

Typically, a Senior Developer is responsible for the entire software development lifecycle of significant components or applications. This includes leading the design and architecture of new systems, often leveraging modern paradigms like microservices and event-driven architecture. They write, review, and debug complex code, setting standards for quality and maintainability. A key part of their role involves making pivotal technology stack decisions, selecting frameworks, databases, and tools that best fit project requirements. They collaborate closely with cross-functional teams, including product managers, business analysts, and other stakeholders, to translate business needs into technical specifications. Furthermore, Senior Developers are expected to drive best practices in coding, testing, and deployment, frequently overseeing CI/CD pipelines and advocating for DevOps and security principles (DevSecOps).

The common skill set for these jobs is both deep and broad. Mastery of one or more core programming languages (such as Java, Python, C#, or JavaScript) and their associated ecosystems is fundamental. Expertise in relevant frameworks (e.g., Spring Boot, .NET Core, React, Angular) is essential. Senior Developers possess a strong grasp of system design principles, database management (both SQL and NoSQL), and API design (REST, GraphQL). Experience with cloud platforms (AWS, Azure, GCP), containerization (Docker), and orchestration (Kubernetes) is increasingly standard. Beyond technical prowess, soft skills are critical: leadership, clear communication, effective mentorship, problem-solving, and the ability to manage time and priorities across multiple projects are what distinguish a senior professional.

Typical requirements for Senior Developer jobs often include a bachelor’s degree in computer science or a related field (or equivalent practical experience) and a substantial track record, usually between 5 to 10+ years of progressive software development experience. Demonstrated experience in leading development initiatives, making architectural decisions, and working within Agile/Scrum methodologies is commonly sought. The role demands a proactive, strategic thinker who stays abreast of emerging technologies and can drive innovation while ensuring system reliability and performance. For those seeking to advance their impact beyond pure coding into areas of design, strategy, and team leadership, exploring Senior Developer jobs is the definitive next step in a thriving tech career.