Acquisition NexGen is currently in search of an API / .NET Developer for an IT Solutions Firm in Herndon, VA.

This is a long-term Contract role. Sponsorship is NOT available.

Candidates MUST BE available to work onsite in Herndon, VA.

Summary:

We are seeking an experienced API Developer (.NET Core 8/9) to join our development team to design, develop, and maintain robust, scalable microservices and APIs. This role will focus on building high-performance back-end services, supporting both web and mobile platforms, and ensuring smooth integration with internal and external systems. The API Developer will collaborate with cross-functional teams including product, DevOps, and front-end developers to deliver innovative solutions as part of the organization’s digital modernization initiatives.

Responsibilities:

• Microservices Development: Design and develop scalable microservices and RESTful API endpoints using .NET Core 8/9 and ASP.NET Core Web API.
• API Implementation: Build well-documented, versioned, secure API endpoints for easy integration with front-end and third-party applications.
• Background Jobs: Develop background workers and asynchronous processing tasks using Azure Service Bus or Azure Storage Queues.
• Message-Driven Architecture: Implement event-driven microservices with reliable inter-service communication.
• Security & Caching: Secure APIs with OAuth2.0, JWT, Azure AD, and implement caching strategies (e.g., Redis, in-memory caching) for enhanced performance.
• Performance Optimization: Continuously monitor, profile, and tune API and database performance to ensure high availability and scalability.
• Clean Code Practices: Write clean, modular, and testable code following SOLID principles and Clean Architecture.
• Collaboration: Work in an Agile/Scrum environment with developers, QA engineers, and product managers to deliver features iteratively.
• Documentation: Maintain comprehensive technical documentation for APIs, workflows, and architectural decisions.
• Troubleshooting: Diagnose and resolve API-related issues, using logging and monitoring tools to ensure system reliability.

Requirements:

• Bachelor’s Degree in Computer Science, Information Systems, or a related technical field.
• 5+ years of experience in .NET Core API and Microservices development to include:
• Strong proficiency with C# programming and ASP.NET Core Web API.
• Solid understanding of Clean Architecture and Domain-Driven Design.
• Deep knowledge of SOLID principles and design patterns.
• Experience with SQL Server, Entity Framework Core, and Dapper for database access and optimization.
• Hands-on experience integrating authentication and authorization mechanisms (OAuth2.0, JWT).
• Strong experience with Git version control and Agile methodologies.
• Ability to conduct performance profiling, load testing, and system optimization.
• Cloud & DevOps Skills:
• Basic understanding of Microsoft Azure cloud services.
• Experience with Docker containerization and familiarity with CI/CD pipelines.
• Testing & Quality Assurance:
• Experience with xUnit, NUnit, or other testing frameworks, and Moq for unit testing and mocking.

Preferred Requirements:

• Hands-on experience with Azure Service Bus, Azure Storage Queues, and Azure Functions.
• Experience with Azure Application Insights, Datadog, or similar observability tools.
• Experience deploying and monitoring applications in cloud-native environments (Azure, Kubernetes, etc.).
• Familiarity with container orchestration and advanced CI/CD automation.
• Strong understanding of API security best practices (preventing injection, XSS, CSRF vulnerabilities).
• Experience with Postman, Swagger for API testing and documentation.

Qualified Candidates should send a Word/PDF attached copy of their resume to Scott Gilinger at [email protected] .