Software Engineer III with TS/SCI Polygraph

Deloitte is seeking a Software Engineer III to join the Process Engineering and Automation team in Baltimore, where secure, scalable software powers AI-enabled websites, internal tools, dashboards, and APIs within a compliance-driven environment. This onsite role offers a salary range of USD 119,000 to 198,400 per year and the opportunity to contribute across the full software development lifecycle.

Responsibilities

• Design, develop, and sustain end-to-end web solutions, including user interfaces, data stores, and server-side services, aligned with program requirements and security standards.
• Own features across the software development life cycle, from requirements analysis and solution design to development, testing, deployment support, and ongoing maintenance.
• Build and enhance applications using Python, HTML, CSS, .NET, and PowerShell while embedding security controls and secure coding practices throughout the workflow.
• Incorporate artificial intelligence capabilities into applications, including large language model features, agentic workflows, intelligent search, and AI-assisted user experiences.
• Develop and maintain unit, integration, and end-to-end tests; participate in code reviews; and document APIs, data models, and architectural decisions.

Requirements

• Bachelor's degree required.
• At least four years of experience in application development with a focus on test-driven development.
• Four or more years of Python experience and full-stack web development expertise, including React, HTML, CSS, .NET, and APIs.
• Four-plus years working across the software development life cycle, from requirements through deployment and maintenance.
• Active TS/SCI clearance with polygraph.
• Ability to travel approximately 10 to 25 percent depending on client assignments.
• Must be legally authorized to work in the United States without employer sponsorship now or in the future.

Technologies

• Python
• HTML
• CSS
• .NET
• PowerShell
• React
• PostgreSQL

Benefits

• Discretionary annual incentive program

Qualifications

• Bachelor's degree required.
• Four or more years of experience in application development, including test-driven development.
• Four or more years of experience with Python and full-stack web technologies, including React, HTML, CSS, .NET, and APIs.
• Four-plus 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 about 10-25 percent based on client work.
• Legal authorization to work in the United States without sponsorship now or in the future.
• Experience with PostgreSQL schema design and relational database development.
• Experience building applications with React and .NET.
• Experience implementing security controls aligned to the Open Worldwide Application Security Project 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 within a CI/CD environment.
• Experience supporting Authority to Operate documentation or security review processes in classified environments.