[Hiring] Principal .NET Engineer @Sigma Software

Role Description

Are you ready to take architectural ownership of a cutting-edge cloud-based payroll and HR SaaS platform? We are looking for a Senior-level Principal Software Engineer (.NET) to join our distributed team and drive technical excellence in a high-impact product used by small businesses and accounting firms across North America.

Key Responsibilities:

• Lead the complete development lifecycle for new features from design to deployment
• Design and implement distributed systems and microservices architecture
• Set up, deploy, and manage scalable cloud infrastructure with automation
• Ensure service performance meets SLA requirements through proactive monitoring
• Drive architecture discussions and document designs aligned with business goals
• Collaborate with Product, DevOps, and Architecture teams
• Mentor junior engineers and promote best practices
• Research and advocate for AI-driven development tools
• Influence technology strategy and drive innovative practices

Qualifications

• 7–8+ years professional experience with .NET Framework and C#/.NET Core
• 2–3+ years in principal, architect, or senior technical leadership roles
• Experience with AI code generation tools (Cursor or similar)
• Expert knowledge of ASP.NET, microservices architecture, RESTful API design
• Knowledge of frontend frameworks (React or Angular)
• Strong expertise in relational (SQL Server) and NoSQL databases
• Deep understanding of software architecture, design patterns, clean coding standards
• Expertise in performance optimization and security best practices
• Proficiency with cloud platforms (Azure, AWS, GCP)
• Proficiency with Infrastructure as Code tools (Terraform, CloudFormation)
• Experience with containerization (Docker, Kubernetes)
• CI/CD pipeline setup and automated testing frameworks
• Excellent communication skills for both technical and non-technical audiences

Requirements

• Experience with AI-assisted development beyond code generation (will be a plus)
• Familiarity with payroll or HR SaaS domain (will be a plus)
• Contributions to open-source projects in .NET ecosystem (will be a plus)

Benefits

• Strategic thinker with strong architectural vision
• Hands-on leader who enjoys mentoring
• Comfortable working in distributed teams
• Proactive in adopting emerging technologies