Senior .NET / Teams & Azure Cloud Engineer | Hybrid

Default Brand; Herndon (VA); Hybrid; USD 120,000 - 160,000; Full time

Benefits offered by this job

Health insurance

401(k) matching

Flexible time off

Job summary

Exostar is seeking a seasoned full-stack software engineer to design, develop, and support cloud services that extend Microsoft Teams, SharePoint Online, and the broader Microsoft 365 platform. You will work in a hybrid Herndon, VA environment on Azure Gov/Commercial, delivering scalable, secure solutions for highly regulated industries.

Ideal candidates have 8+ years in .NET, strong REST/microservice experience, and a track record of leading web applications from inception to production, with

Qualifications

• 8+ years of hands-on experience in software development using Microsoft .NET and modern web technologies.
• A Bachelor’s degree in Computer Science, Engineering, Information Systems, or a related technical field, or the foreign equivalent.
• Proven experience leading the design, development, and deployment of at least one major web application or product.
• Strong foundation in Object-Oriented Programming (OOP), SOLID principles, and software design patterns.
• Deep understanding of Data Structures and Algorithms.
• 8+ years of experience with C# and the .NET ecosystem, including .NET 6 or newer, ASP.NET Core, and Entity Framework Core.
• Extensive experience designing and building RESTful APIs and microservices on .NET.
• Hands-on experience developing Microsoft 365 solutions, including Microsoft Teams apps (tabs, bots, messaging extensions), SharePoint Online (SPFx, SharePoint REST / CSOM), and the Microsoft Graph API.
• Experience with the Microsoft identity platform and Microsoft Entra ID (Azure AD), including OAuth 2.0, OpenID Connect, app registrations, and delegated and application permission models.
• Experience building and deploying solutions on Microsoft Azure, including Azure App Service, Azure Functions, Azure Storage, Azure Key Vault, Azure Service Bus, and Application Insights.
• Experience working in Azure Government (GCC / GCC High) as well as Azure Commercial, with an understanding of the differences between sovereign and commercial cloud endpoints and services.
• Proficiency with relational databases, especially Microsoft SQL Server, including schema design, T-SQL, stored procedures, and query performance tuning.
• Familiarity with CI/CD pipelines using Azure DevOps or GitHub Actions, and infrastructure-as-code such as ARM / Bicep or Terraform.
• Experience developing and integrating large-scale distributed web applications.
• Proficiency in Angular 12+, Angular Material, RxJS
• Strong testing background using xUnit, NUnit, or MSTest with Moq for unit and integration testing, and Jasmine / Karma or Jest for front‑end tests.
• Experience with .NET performance tuning, profiling, and production diagnostics.
• Skilled in building responsive UIs and Single Page Applications (SPAs), including Teams-hosted experiences using Fluent UI.
• A comprehensive understanding of web architecture, including platforms, APIs, caching, proxies, and databases.
• Knowledge of web security best practices, including protection against XSS, CSRF, and the OWASP Top 10 vulnerabilities.
• Experience working in Agile/SCRUM teams alongside architects, engineers, product managers, and QA.

Responsibilities

• Designing and developing full-stack solutions using C#/.NET, ASP.NET Core Web API, and Angular, employing industry‑best design patterns and development practices.
• Building and extending Microsoft 365 integrations, including Microsoft Teams applications, SharePoint Online solutions, and Microsoft Graph API integrations, within a Product Engineering & Development team.
• Designing, deploying, and operating cloud services in both Azure Commercial and Azure Government (GCC / GCC High) environments, meeting the security and compliance requirements of regulated customers.
• Designing relational data models and writing and tuning SQL Server queries, stored procedures, and data access code.
• Assisting product managers and customers in understanding Exostar technology, products, and services.
• Mentoring development teams on design patterns and evangelizing software development practices and processes.
• Leading design reviews and code walkthroughs for small teams, and presenting architecture and designs to Exostar customers and the management team.
• Owning the product from inception through deployment and support in production.

Job description

Exostar is seeking a seasoned full-stack software engineer to design, develop, and support cloud services that extend Microsoft Teams, SharePoint Online, and the broader Microsoft 365 platform. You will work in a hybrid Herndon, VA environment on Azure Gov/Commercial, delivering scalable, secure solutions for highly regulated industries.

Ideal candidates have 8+ years in .NET, strong REST/microservice experience, and a track record of leading web applications from inception to production, with