Senior Software Developer

Vosper Thornycroft Group; Herndon (VA); On-site; USD 100,000 - 130,000; Full time

Job summary

Vosper Thornycroft Group seeks a Senior Software Developer in Herndon, Virginia. The role demands expertise in secure software engineering, development of Windows applications and services, knowledge of AWS and Azure, and proficiency in .NET and Python. The ideal candidate will possess a Top Secret Clearance and a Bachelor's degree in Computer Science or related fields. Responsibilities include designing secure applications, automating scripts, and collaborating in an Agile environment to ensure the security of customer assets.

Qualifications

• Must have a Top Secret Clearance with Polygraph.
• Minimum 6 years’ experience in software development.
• Proficiency with developing Windows Applications, Windows Services, and Web Services on IIS.
• Experience working with AWS and Azure.
• Experience using GitHub, Jira, Jenkins, and Confluence.

Responsibilities

• Design, develop, test, and deploy secure Windows applications and services.
• Automate scripts using PowerShell for system administration.
• Manage cloud-based solutions on AWS and Azure.
• Utilize version control and documentation tools securely.
• Work with customer-specific IT tools for secure integration.

Skills

Secure software engineering

.NET (C#, WPF/XAML, C++)

ASP.NET MVC Web API

Python

PowerShell

AWS

Azure

GitHub

Jira

Jenkins

Confluence

Microsoft PowerBI

Education

Bachelor’s degree in Computer Science, Information Security, or related field

Job description

Overview

We are seeking a versatile Senior Software Developer with expertise in secure software engineering. The ideal candidate will combine technical proficiency in development tools and cyber security. The candidate will work in an agile environment, collaborating with cross-functional teams to address a broad range of IT issues while safeguarding customer assets.

What will you do?

• Design, develop, test, and deploy secure Windows applications, services, and web services using .NET (C#, WPF/XAML, C++), ASP.NET MVC Web API, HTML/CSS, Python, and PowerShell, ensuring integration with IIS and adherence to secure coding standards.
• Develop and automate scripts using PowerShell for system administration, problem‑solving, and security‑related tasks, such as monitoring and mitigating vulnerabilities in Windows environments.
• Manage cloud‑based solutions on AWS and Azure, incorporating security best practices for deployment and access controls.
• Utilize tools like GitHub, Jira, Jenkins, and Confluence for version control, issue tracking, continuous integration/deployment (CI/CD), and documentation, while ensuring secure configurations.
• Work with customer‑specific IT tools, including Secure Token Service (STS) and DataHound, to integrate secure authentication and data management into applications.
• Participate in Agile methodologies and ceremonies (e.g., sprints, stand‑ups, retrospectives) to deliver features iteratively.
• Create and maintain comprehensive documentation, including requirements gathering, design documents, technical writing, and A&A artifacts (e.g., security plans, test reports, and authorization packages).

Do you have what it takes?

• Must have a Top Secret Clearance with Polygraph
• Minimum 6 years’ experience in software development
• Bachelor’s degree in Computer Science, Information Security, or a related field (or equivalent experience)
• Proficiency with .NET (C#, WPF/XAML, C++), Web (ASP.NET MVC Web API, HTML/CSS), Python, PowerShell
• Proficiency with developing Windows Applications, Windows Services, and Web Services on IIS
• Experience working with AWS and Azure
• Experience using GitHub, Jira, Jenkins, and Confluence
• Proficiency with Secure Token Service (STS) and DataHound (customer‑specific IT tools)
• Experience with Microsoft PowerBI
• Familiarity with Windows System Administration and troubleshooting
• Familiarity with the Software Development Lifecycle (SDLC), including configuring and deploying to IIS.
• Experience with requirements gathering, creation of design documentation, and technical writing

Preferred Education, Experience, & Skills

• Familiarity with the Agile methodology and ceremonies
• Strong problem‑solving skills and the ability to thrive in a dynamic, issue‑diverse IT landscape