Senior .NET Backend Engineer for AI-Driven Platform

Dayforce; Toronto; On-site; CAD 100,000 - 150,000; Full time

Job summary

Dayforce, a global HCM company based in Toronto, is seeking a Senior Software Developer to design and build core services for AI-enabled agent platform. You will focus on backend, reliability, and scalable infrastructure in distributed systems.

You will implement APIs, security patterns, observability, and collaborate with product and engineering teams to enable integration with Agent Platform.

Qualifications

• 5+ years delivering enterprise-level software
• Strong understanding of object-oriented design and development
• Experience building high performing, scalable applications
• Experience with C# and the .NET framework
• Experience with SQL, T-SQL, database design and query optimization
• Familiarity with agile development environments
• Interest in AI-assisted software development and emerging technologies

Responsibilities

• Design and implement production-grade backend services supporting AI-driven workflows
• Contribute to execution orchestration, task routing, and tool invocation systems
• Develop APIs and service contracts that are stable, extensible, and well-documented
• Implement robust authentication, authorization, and secure execution patterns
• Build systems with strong logging, metrics, and tracing; improve resilience and performance

Skills

Distributed systems

OO design

C# / .NET

SQL / T-SQL

Agile development

AI/LLMs in apps

AI tools

Tools

SQL Server

Job description

Dayforce, a global HCM company based in Toronto, is seeking a Senior Software Developer to design and build core services for AI-enabled agent platform. You will focus on backend, reliability, and scalable infrastructure in distributed systems.

You will implement APIs, security patterns, observability, and collaborate with product and engineering teams to enable integration with Agent Platform.