Senior .NET Software Engineer

About this role

What we do

KinderSystems (www.KinderSystems.com) is the leading provider of subsidy management software-as-a-service (SaaS) solutions to state agencies, Head Start programs, and child care providers. Built and supported by industry experts, KinderSystems envisions a world where all families, no matter their income level, have access to high quality child care. Hundreds of agencies in the publicly funded child care sector use KinderSystems applications via the cloud or mobile devices to streamline their operations, ensure compliance with government regulations, and meet the needs of the families they serve.

What you'll do:

We’re looking for a talented Senior .NET Software Engineer to join our team and make an impact from day one. This is a full-stack role where you’ll work across everything—from backend services and data design to cloud infrastructure and modern web front-ends. You’ll be a hands-on builder who enjoys creating scalable, secure, and maintainable systems, all within the Microsoft ecosystem.

Core Responsibilities:

• Design, develop, and maintain full-stack applications using C#, .NET Framework, and .NET 8+
• Build and optimize RESTful APIs following industry best practices for versioning, error handling, pagination, and documentation
• Architect and implement Azure Serverless solutions (Azure Functions, Logic Apps) and event-driven messaging via Azure Service Bus
• Design and manage Azure Cosmos DB data stores, including partition strategy, indexing, and performance tuning
• Develop and maintain complex MSSQL stored procedures, with a strong command of query optimization and execution plans
• Lead data modeling efforts across relational and NoSQL databases, ensuring integrity, scalability, and alignment with business requirements
• Implement authentication and authorization flows using OAuth 2.0 / OpenID Connect
• Apply OWASP Top 10 security best practices across all layers of the application stack
• Develop responsive, accessible we...