Software Engineer III with TS/SCI Polygraph

Deloitte is hiring a Software Engineer III to design, build, and maintain secure, scalable applications in a compliance-driven environment. This role sits onsite in Rosslyn, VA and focuses on process engineering and automation, including AI-enabled capabilities. If you hold an active TS/SCI clearance with polygraph, you will help deliver software that supports operational efficiency in secure, highly regulated settings.

What you’ll be doing

• Design, build, and maintain full-stack web applications including user interfaces, databases, and server-side services, aligned to program requirements and security standards
• Own assigned features across the software development life cycle, including requirements analysis, solution design, development, testing, deployment support, and ongoing maintenance
• Develop and enhance applications using Python, HTML, CSS, .NET, and PowerShell, with secure coding practices and security controls built into development
• Integrate artificial intelligence capabilities, including large language model features, agentic workflows, intelligent search, and AI-assisted user experiences
• Create and maintain unit, integration, and end-to-end tests, participate in code reviews, and document application programming interfaces, data models, and architectural decisions

Team focus

The Process Engineering and Automation team applies technology to improve business processes. Team members collaborate to develop scalable solutions across automation, artificial intelligence, robotic process automation, agentic workflows, and scripting tools, with a focus on solving complex process challenges in secure and highly regulated environments.

Required qualifications

• Bachelor’s degree
• 4+ years of experience in application development, including test-driven development
• 4+ years with Python and full-stack web development technologies, including React, HTML, CSS, .NET, and APIs
• 4+ years across the software development life cycle, including requirements analysis, design, development, testing, deployment, and maintenance
• Active TS/SCI clearance with polygraph
• Ability to travel 10–25%, on average, based on work and clients/industries served
• Must be legally authorized to work in the United States without employer sponsorship, now or in the future

Technologies you’ll work with

Python, HTML, CSS, .NET, PowerShell, React, APIs, large language model features, agentic workflows, intelligent search

Preferred experience

• Experience with PostgreSQL schema design and relational database development
• Experience building applications with React and .NET
• Experience implementing security controls aligned to OWASP Top 10 guidance
• Experience integrating large language model capabilities, agentic workflows, or intelligent search into applications
• Experience writing unit, integration, and end-to-end tests in a CI/CD environment
• Experience supporting Authority to Operate (ATO) documentation or security review processes in classified environments

Compensation

The wage range for this role is estimated at $119,000 to $218,300 per year. You may also be eligible to participate in a discretionary annual incentive program, subject to program rules, where awards depend on factors including individual and organizational performance.