Senior .NET Developer

Prime Source Technologies, LLC; Vienna (VA); Hybrid; USD 120,000 - 170,000; Full time

Job summary

Prime Source Technologies (PST) is seeking a skilled Senior .NET Core Developer to design, develop, and optimize modern, high-performance enterprise applications. The position is in Northern Virginia, hybrid work from the office initially 3 days per week, with W2, 1099, C2C, and H1B options.

You will design and implement RESTful APIs and GraphQL endpoints, build microservices with Docker/Kubernetes, and maintain CI/CD pipelines using Azure DevOps or GitHub Actions.

Qualifications

• Bachelor's degree in CS, Eng, or related field.
• 10+ years of software development experience with at least 3 years in .NET Core.
• Expert in C#, ASP.NET Core, EF Core, and LINQ.
• Experience with microservices and container deployments (Docker, Kubernetes).
• Hands-on with Azure cloud and SQL Server.
• Experience with message brokers (Azure Service Bus, RabbitMQ, Kafka).
• Proficient in Blazor/Razor UI and CI/CD workflows.
• Strong problem-solving and communication skills.

Responsibilities

• Design, develop, and maintain robust, scalable apps using C# and .NET Core.
• Build RESTful APIs and GraphQL endpoints for cross‑platform integration.
• Develop microservices with Docker/Kubernetes and secure CI/CD pipelines.
• Apply DDD and clean architecture principles to enterprise systems.
• Collaborate with UI teams using Blazor to deliver responsive interfaces.
• Ensure quality via unit/integration tests and automated frameworks.
• Mentor junior developers and participate in peer code reviews.

Skills

Problem solving

Communication

Mentoring

Leadership

Education

Bachelor's degree in CS/Engineering/related

Microsoft certification

Cloud and AI certification

Tools

ASP.NET Core

C#

Entity Framework Core

LINQ

Docker

Kubernetes

Azure

SQL Server

Azure Service Bus

RabbitMQ

Kafka

Blazor

Identity Server / Azure AD

Job description

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Job Title

Job Type

Full-time

Location

Job Description

Prime Source Technologies (PST) is seeking a skilled and motivated Senior (expert level) “.NET Core” Developer to design, develop, and optimize modern, high-performance, and scalable enterprise applications. This role requires deep technical expertise in .NET Core and related Microsoft technologies, along with strong knowledge of cloud-native development, modern front-end frameworks, microservices, and DevOps practices. The job location is in Northern Virginia (Initially 3 days' work from the office). The Senior .NET Core Developer will collaborate closely with Project Managers, Architects, Testers, and UI/UX designers to deliver cutting-edge solutions using the latest technologies and best practices.

This position is open to W2, 1099, C2C and H1B.

POSITION DESCRIPTION:

• Design, develop, and maintain robust, scalable, and secure applications using C#, ASP.NET Core (.NET 8+) Blazor and Razor Pages
• Design and implement RESTful APIs and GraphQL endpoints for cross-platform integration.
• Build microservices-based applications with containerization (Docker, Kubernetes).
• Implement clean architecture principles and domain-driven design (DDD).
• Optimize application performance, security, and scalability.
• Collaborate with UI teams building responsive and dynamic interfaces using Blazor.
• Maintain CI/CD pipelines using Azure DevOps or GitHub Actions.
• Ensure high-quality code via unit testing, integration testing, and automated test frameworks.
• Apply secure coding practices (OWASP guidelines, authentication & authorization with Identity Server or Azure AD).
• Write architecture and design documents as needed.
• Mentor junior developers and participate in peer code reviews.

Job Requirements

• Minimum bachelor’s degree in computer science, Engineering, or related field.
• 10+ years of professional software development experience, with at least 3 years in .NET Core in a large, enterprise project
• Expert in C#, ASP.NET Core, Entity Framework Core, and LINQ.
• Experience in microservices architecture and containerized deployments (Docker, Kubernetes).
• Hands-on and extensive experience with cloud platforms (Azure preferred).
• Proficiency in SQL Server (T-SQL, stored procedures, triggers, performance tuning).
• Experience with message brokers (Azure Service Bus, RabbitMQ, Kafka).
• Extensive experience with front-end frameworks (Blazor/Razor).
• Experience with DevOps and CI/CD workflows.
• Excellent problem-solving and communication skills.

Nice to Have

• Experience with AI/ML integration in .NET applications.
• Experience with event-driven architecture and CQRS pattern.
• Experience with ArcGIS or GIS-based systems.
• Experience with Angular or React

EDUCATION/ TRAINING/ CERTIFICATIONS:

Bachelor's degree in Computer Science, Engineering or related fields

Microsoft certification, Cloud and AI certification is highly desired

EOE Statement

We are an equal employment opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, national origin, disability status, protected veteran status or any other characteristic protected by law.