WEB API DEVELOPER

Threatlocker Inc • Orlando, FL

6d • Onsite

About The Position

ThreatLocker is seeking a skilled and motivated Web API Developer to join our cybersecurity engineering team. In this role, you will design, develop, and maintain secure and scalable RESTful APIs using C#/.NET. These APIs connect critical components of ThreatLocker’s endpoint protection platform, including agents, services, data layers, and user-facing applications. The ideal candidate has solid experience with C#/.NET and Web API development, along with a working understanding of the MVC pattern and separation of concerns. You will collaborate with experienced developers and cross-functional teams to build reliable endpoints, improve existing services, and continue growing your technical skills. We value developers who write clear, maintainable code, approach security thoughtfully, and enjoy solving practical problems as part of a collaborative team.

Requirements

• Minimum of three years of professional experience developing applications with C#/.NET and ASP.NET Web API or ASP.NET Core.
• Working knowledge of the MVC pattern, including controllers, models, routing, dependency injection, middleware, and request/response handling.
• Experience designing and consuming RESTful APIs using HTTP methods, status codes, and JSON.
• Familiarity with asynchronous programming, exception handling, logging, and debugging in .NET.
• Hands-on experience using ADO.NET directly for SQL Server data access, including commands, parameters, stored procedures, transactions, and data readers.
• Understanding of secure coding practices, including input validation, authentication, authorization, and protection of sensitive data.
• Experience using Git, participating in code reviews, and working within a collaborative development workflow.
• Bachelor’s degree in Computer Science, Software Engineering, or equivalent hands-on experience.

Nice To Haves

• Experience working with both .NET Framework and modern .NET, including .NET 8.
• Familiarity with OpenAPI/Swagger, Postman, and automated unit or integration testing.
• Experience with GitHub Actions, CI/CD pipelines, or automated build and deployment workflows.
• Exposure to cybersecurity, endpoint protection, or other security-focused software products.
• Understanding of API performance, scalability, monitoring, and observability concepts.
• Familiarity with containerized environments, cloud platforms, or IIS-hosted applications.
• Microsoft, .NET, cloud, or cybersecurity certifications are a plus.

Responsibilities

• Design, develop, and maintain secure RESTful Web APIs using C#/.NET.
• Apply the MVC pattern and separation of concerns when organizing controllers, models, services, and data-access components.
• Implement API endpoints with appropriate request validation, authentication, authorization, error handling, and logging.
• Integrate APIs with SQL Server and other internal services while considering reliability and performance.
• Diagnose and resolve issues involving API behavior, request processing, concurrency, and data access.
• Collaborate with developers, product owners, QA, and other teams to refine requirements and deliver dependable solutions.
• Participate in code reviews, testing, documentation, and continuous improvement of the codebase and development process.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level