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# Software Developer - Senior

- **Company:** ECS Limited
- **Location:** Stafford, VA, United States
- **Experience:** Expert
- **Salary:** $130,000.0 - $150,000.0
- **Contract:** Permanent contract
- **Skills:** HTML, Agile Methodology, Amazon Web Services, Data Analysis, Component-Based Software Engineering, Unit Testing, Microsoft Azure, Behavior-Driven Development, Big Data, C Sharp (Programming Language), Cloud Computing, Continuous Delivery, Continuous Integration, Relational Databases, DevOps, Entity Framework, Github, Microsoft SQL Server, Nunit, Scrum Methodology, Software Engineering, Web Applications, Test-Driven Development (TDD), ReactJS, Blazor, AngularJS, Integration Tests, Kubernetes, Extreme Programming, Restful APIs, Docker, Jenkins
- **Published:** November 3, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9285173/software-developer-senior

## About the Role

* US citizen and active Secret clearance
 * 8 years software development experience
 * Bachelor's degree or additional relevant experience
 * At least 8+ years software development experience, preferably with C# and.NET. Years of experience can be offset with certifications
 * Able to work across services, able to identify potential challenges, design and communicate solutions
 * Developing unit tests with NUnit, xUnit, or other frameworks
 * Relational database design and development experience, preferably using SQL Server
 * Experience developing web-based applications, including use of HTML and CSS
 * Experience developing or consuming services and RESTful APIs
 * Experience working with an agile team using SCRUM, XP, Kanban, or other Lean development approaches
 * Knowledge of Continuous Integration/Continuous Delivery tools such as Azure DevOps, Jenkins, or GitHub
 * Excellent interpersonal, communication, and organizational skills
 * Desire to work in a collaborative and team-focused environment
 * Strong attention to detail, critical thinking skills, and solid troubleshooting ability
 * Experience in being a people manager for junior/mid developers.

Desired Skills

 * Experience developing with component-based frameworks such as Blazor, Angular, or React
 * Experience managing and leading other developers within a team
 * Experience working with AWS or Azure services and cloud technologies
 * Knowledge of DevOps techniques and approaches to software development
 * Knowledge of Docker and containers
 * Knowledge of Kubernetes or other container orchestration technology
 * Knowledge of Behavior Driven Development (BDD) or Test-Driven Development (TDD)

## Description

ECS is seeking a Developer to work in our Stafford, VA office.

This role supports a program providing application design, development, enhancement and implementation support to mission critical law enforcement applications. These applications are designed to manage large data sets and indexes and support information sharing, data analysis, and electronic exchange to support investigations and collaboration to identify previously unknown connections and streamline the processes for searching and utilizing available data sets.

The primary functions for this position include:

 * Design and develop testable code using C#, HTML, Blazor, and Entity Framework
 * Develop and maintain unit and integration tests
 * Actively participate in Agile sprint planning and retrospectives
 * Participate as a team member/lead in sprint demonstrations and presentations to product stakeholders

Salary Range: $130,000 - $150,000