Senior .NET Developer
JobSiteCare
•$135,000 - $150,000•Onsite
About The Position
We are seeking an experienced Senior .NET Developer to join our engineering team and lead the design, development, and optimization of mission-critical applications across our cloud and client platforms. The ideal candidate has a strong foundation in C#/.NET, deep experience building scalable solutions on Microsoft Azure, and hands-on expertise with Azure PaaS services, Azure SQL, .NET MAUI, and React.js. This role will collaborate closely with product owners, architects, and cross-functional teams to deliver high-quality, modern software that supports our organization’s growth and enhances the user experience. This role will provide the opportunity to work with modern cloud-native technologies in a high impact environment, collaborative team culture with strong engineering values, and professional development mentoring.
Requirements
- 7+ years professional experience in software development with C# and .NET.
- Demonstrated experience migrating or modernizing legacy systems and rapidly ramping on an existing codebase under deadline pressure.
- Strong experience with Azure PaaS services, including at least several of: Azure App Service, Azure Functions, Event Grid, Service Bus, Storage, API Management, Key Vault, and Logic Apps.
- Hands-on expertise with Azure SQL, including schema design, performance tuning, and querying.
- Production experience building cross-platform apps using .NET MAUI (or Xamarin.Forms with migration experience).
- Strong proficiency with React.js, modern JavaScript/TypeScript, and front-end build tooling (Vite, Webpack, npm/Yarn, etc.).
- Experience building and consuming RESTful APIs and integrating with authentication/authorization systems (e.g., Azure AD, B2C, OAuth2).
- Solid understanding of cloud-native best practices, distributed systems, and application performance patterns.
- Experience in Agile/Scrum environments with modern DevOps workflows.
- Working knowledge of HIPAA and PHI-handling requirements in a healthcare software environment.
- Excellent communication and technical documentation skills.
- Strong analytical thinking and problem-solving abilities.
- Ability to work independently while collaborating effectively within cross-functional teams.
- A commitment to code quality, maintainability, and continuous improvement.
Nice To Haves
- Familiarity with NoSQL solutions (Cosmos DB, Table Storage, Blob Storage).
- Experience with message-driven architectures or event-based systems.
- Prior work with automated testing frameworks (xUnit, Jest, Playwright, etc.).
- Knowledge of security best practices for cloud applications (OWASP, zero-trust, secret management).
- Knowledge of healthcare security best practices for cloud applications (HIPAA, FHIR, HL7) is a plus.
- Exposure to Blazor or other .NET UI frameworks is a plus.
Responsibilities
- Migrate and re-platform the existing C3 / JobSiteCare system off Salesforce into a modern C#/.NET architecture ahead of contractual deadlines.
- Rapidly ramp on and interpret an existing (legacy) codebase, replicating proven functionality rather than rebuilding from scratch where appropriate.
- Design, develop, and maintain enterprise-grade applications using C#/.NET 6+, including backend APIs and shared libraries.
- Build cross-platform client applications using .NET MAUI for mobile and desktop environments.
- Develop high-performance web front-ends using React.js and modern JavaScript/TypeScript tooling.
- Implement cloud-native application architectures leveraging Azure PaaS offerings such as Azure App Service, Functions, Service Bus, Key Vault, API Management, Logic Apps, and Storage.
- Design scalable and resilient microservices or modular monolithic architectures, depending on project needs.
- Design and optimize relational schemas in Azure SQL Database.
- Implement stored procedures, indexing strategies, and performance tuning to ensure highly available, performant data access layers.
- Work with data architects to ensure data integrity, security, and compliance.
- Collaborate with DevOps engineers to define CI/CD pipelines (Azure DevOps or GitHub Actions) for automated builds, tests, and deployments.
- Participate in environment configuration, infrastructure-as-code (ARM/Bicep/Terraform), and application monitoring using Azure Monitor, Application Insights, and Log Analytics.
- Troubleshoot production issues and lead root-cause analysis efforts.
- Work effectively alongside AI coding tools and agentic development workflows (e.g., Claude Code) to accelerate delivery while maintaining code quality and security.
- Ensure all AI-assisted work is performed within Company-approved accounts and tooling to preserve code history, usage governance, and data security.
- Mentor junior and mid-level developers to elevate team technical capabilities.
- Participate in sprint planning, code reviews, architectural discussions, and system documentation.
- Partner with QA to ensure testability, automation coverage, and overall product quality.
- Collaborate with UX/UI teams to deliver intuitive and responsive cross-platform user experiences.
Benefits
- professional development mentoring
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
