Software Developer Sr

Dayforce US, Inc.; Canada; On-site; CAD 120,000 - 160,000; Full time

Job summary

Dayforce US, Inc. in Canada is seeking a Senior Software Developer to help modernize core services for a large-scale SaaS platform. You will work across backend systems and frontend components, driving faster, more reliable delivery with confidence.

The role emphasizes automation, reliability, and continuous improvement, with opportunities for AI-assisted tooling to boost developer productivity and platform adoption.

Qualifications

• Proven experience in C#, .NET Framework, .NET Core and enterprise app development.
• Experience migrating applications from .NET Framework to .NET Core / modern .NET.
• Experience building backend services and web components for SaaS/enterprise apps.
• Strong understanding of microservices, distributed systems and cloud-native architectures.

Responsibilities

• Design, build, and modernize scalable application components and platform services.
• Lead migrations from .NET Framework to .NET Core / modern .NET.
• Modernize existing layers including backend services and web UI components.
• Analyze legacy patterns and drive modernization for maintainability and performance.
• Resolve production performance, scalability, reliability, and compatibility issues.
• Collaborate with cross-functional teams to deliver platform capabilities.
• Drive technical design decisions and architecture direction.
• Mentor engineers and promote strong engineering practices.

Skills

C#

.NET Framework

.NET Core

Enterprise apps

SQL Server

Distributed systems

Tools

Docker

Kubernetes

Azure

Job description

Posted Wednesday, July 22, 2026 at 5:00 AM | Expires Wednesday, September 23, 2026 at 4:59 AM

Dayforce is a global human capital management (HCM) company headquartered in Toronto, Ontario, and Minneapolis, Minnesota, with operations across North America, Europe, Middle East, Africa (EMEA), and the Asia Pacific Japan (APJ) region.

Our award-winning Cloud HCM platform offers a unified solution database and continuous calculation engine, driving efficiency, productivity and compliance for the global workforce.

Our brand promise - Makes Work Life Better ™ - Reflects our commitment to employees, customers, partners and communities globally.

About the Opportunity

Are you passionate about modernizing enterprise applications, building scalable software solutions, and solving complex engineering challenges? Do you enjoy working across backend systems and application layers to help teams deliver faster, more reliably, and with greater confidence?

We are looking for a Senior Software Developer to join the Dayforce Core Services team, where you will help modernize and evolve critical application components, support a large‑scale SaaS platform, and contribute to AI‑assisted engineering solutions that improve developer productivity and platform adoption.

We develop and operate the core platform, infrastructure, and tooling that serve as the foundation for the Dayforce web application. We work in an agile environment with a strong focus on automation, reliability, and continuous improvement, while encouraging professional growth through ongoing learning opportunities and resources.

What You’ll Get to Do

• Design, build, and modernize scalable application components and platform services.
• Lead and contribute to migration initiatives from .NET Framework to .NET Core / modern .NET.
• Support the modernization of existing application layers, including backend services and web application components.
• Analyze legacy application patterns and drive modernization approaches that improve maintainability, performance, and scalability.
• Solve performance, scalability, reliability, and compatibility challenges in production systems.
• Collaborate with cross‑functional teams to deliver impactful platform and product capabilities.
• Drive technical design and architecture decisions.
• Mentor engineers and contribute to strong engineering practices.
• Build and leverage AI‑assisted tools and agents to improve developer productivity and accelerate modernization efforts.

Skills and Experience We Value

Core Development & Modernization Experience

• Proven expertise in C#, .NET Framework, .NET Core / modern .NET, and enterprise application development.
• Solid hands‑on experience developing, maintaining, and modernizing applications across both .NET Framework and .NET Core / .NET.
• Demonstrated experience migrating applications from legacy .NET Framework to .NET Core / modern .NET.
• Experience across both backend services and web application components.
• Track record of building scalable SaaS or enterprise applications.
• Solid understanding of system design and distributed application concepts.
• Deep knowledge of SQL Server and relational databases.
• Experience designing and building microservices and containerized applications (Docker/Kubernetes).
• Experience working with Azure or cloud‑native architecture.
• Experience modernizing legacy applications and refactoring monolithic systems into more maintainable architectures.
• Strong understanding of modernization strategies, including dependency analysis, compatibility assessment, and incremental migration approaches.
• Familiarity with application framework patterns commonly found in mature enterprise web applications.

Engineering Practices & Reliability

• Experience implementing observability, logging, and monitoring solutions.
• Experience working with CI/CD pipelines and DevOps practices.
• Strong problem‑solving, troubleshooting, and debugging skills.
• Ability to balance delivery of new capabilities with technical debt reduction and platform modernization.

What Would Make You Stand Out

• Strong general proficiency with AI developer tooling, including Claude Code, Cursor, Windsurf, GitHub Copilot, and related tools.
• Experience using AI‑assisted development tools to accelerate coding, debugging, documentation, and workflow automation.
• Ability to evaluate and adopt emerging AI engineering tools and integrate them effectively into day‑to‑day development practices.

What’s in it for you

Dayforce is fueled by the diversity of our talented employees. We are an equal opportunity employer and consider and embrace ALL individuals and what makes them unique. We believe our employees should be happy and healthy, with peace of mind and a sense of fulfillment.

We encourage individuals to apply based on their passions.

Dayforce encourages personal and professional growth. We offer excellent time away from work programs, comprehensive wellness initiatives and recognition through competitive pay and benefits.

With a commitment to community impact, including volunteer days and our charity, Dayforce Cares we provide opportunities for you to thrive both in your career and personal life. Our focus is not just on your job but on supporting you to be the best version of yourself.

This job posting is for an existing vacancy

Artificial intelligence may be used in the screening, assessment, or selection of applicants for this position.

About the Salary Ranges

Please note that the salary range mentioned in this job description should serve simply as a guide. The final compensation offered may vary based on a variety of factors, including bonuses and/or incentives, or a candidate’s experience, skills, budget and location. Our company is committed to providing a fair, equitable, and competitive package that reflects the value an individual brings to the organization.

Proficiency in English is required for this position as this role will regularly interact with English‑speaking stakeholders, co‑workers, managers and/or clients across the world. Further, our back office support teams, including but not limited to Human Resources, are primarily English speaking. Employees need to be able to communicate with these departments in English to appropriately administer their business relationship. Due to the significant high volume of interactions with these English‑speaking co‑workers, managers, stakeholders and/or clients, which is inherent to this position, it is not possible to reorganize the company's activities to avoid this requirement.

Fraudulent Recruiting

Beware of fraudulent recruiting. Legitimate Dayforce contacts will use an @dayforce.com email address. We do not request money, checks, equipment orders, or sensitive personal data during the recruitment process. If you have been asked for any of the above, or believe you have been contacted by someone posing as a Dayforce employee, please refer to our fraudulent recruiting statement found here: https://www.dayforce.com/be-aware-of-recruiting-fraud

Dayforce actively monitors all job applications to ensure authenticity. Submissions determined to be fraudulent or misleading will be declined from the recruitment process.