Senior .NET Developer

We are seeking a Senior .NET Developer to design, build, and maintain scalable, secure applications for our commercial clients. You will own features end to end - from architecture and implementation through testing and deployment - and serve as a technical anchor for the team, mentoring engineers and shaping engineering standards. This is a hybrid role combining onsite collaboration with remote flexibility. What You’ll Do Design and develop scalable web applications and APIs using C#, .NET (Core / 6/7/8), and ASP.NET. Write clean, testable, well-documented code and lead code reviews to uphold engineering quality. Architect and build RESTful services and integrations with internal and third-party systems. Model and optimize relational and non-relational data solutions using SQL Server, Entity Framework, and related technologies. Deploy and support cloud-native applications and CI/CD pipelines (Azure preferred; AWS a plus). Collaborate with product owners, QA, and other developers in an Agile/Scrum environment. Mentor junior and mid-level developers, providing technical guidance and career support. Troubleshoot and resolve performance, security, and reliability concerns proactively across the application lifecycle. Required Qualifications, Title: Senior Software Developer - Security (.NET Developer) Location: Philadelphia, PA OR Remote Duration: 12+ months contract Interview Mode: Virtual round Security knowledg…

• 7 days ago
• Apply easily, American Heritage Credit Union, a $5.3+ billion credit union, has an immediate opening for a Senior Software Developer in our Information Services Department. This position will an…
• 18 days ago +

12+ years of professional software development experience, with strong recent work in C# and .NET. Deep expertise in ASP.NET Core / MVC and building RESTful Web APIs. Strong proficiency with SQL Server and ORM frameworks such as Entity Framework. Experience with front-end technologies (JavaScript/TypeScript, HTML5, CSS) and a modern framework such as Angular, React, or Blazor. Hands-on experience deploying to a cloud platform (Azure preferred) and using CI/CD tooling (Azure DevOps, GitHub Actions, or equivalent). Solid understanding of software design patterns, SOLID principles, and secure coding practices. Proficiency with Git and collaborative version-control workflows. Experience working in Agile/Scrum teams. Bachelor’s degree in Computer Science, Engineering, or a related field - or equivalent practical experience. Excellent written and verbal communication skills; must be authorized to work in the U.S. Preferred Qualifications Microsoft certifications (e.g., Azure Developer Associate, Azure Solutions Architect). Experience with microservices, containerization (Docker, Kubernetes), and message-based architectures. Familiarity with automated testing frameworks (xUnit, NUnit, MSTest) and test-driven development. Exposure to low-code/no-code platforms (Power Platform, Salesforce, ServiceNow, Appian) or BI/analytics tools. Prior consulting or client-facing delivery experience.