Principal Mission Engineer - Full Stack (Secret Clearance Required)

STR

2d • $240,000 - $290,000 • Hybrid

About The Position

The Principal Mission Engineer (Full Stack) will develop and deploy software for real-world national security missions in partnership with customers. This role leads software teams in designing, developing, integrating, deploying, and maintaining reliable, high-performance systems for operational use in complex, high-security environments. The engineer combines mission knowledge, customer relationship management, product discovery, and technical leadership to ensure delivered products meet operational needs and quality standards.

The role involves breaking down use cases and user-defined problems, building minimum viable products, and evolving them into cohesive applications. It also includes extending existing applications with new workflows, scalability improvements, and features that address customer needs. The engineer builds high-performance, visually appealing frontend solutions that remain responsive and intuitive with large datasets and heavy loads, and leads cross-functional teams integrating capabilities into existing systems.

The Principal Mission Engineer works closely with end users—typically military or Government operators—to understand requirements and translate them into software features. The role includes travel to customer integration sites to deploy, test, and troubleshoot software in secure operational environments; average travel is expected not to exceed one week per month. STR offers a flexible hybrid environment, with remote work permitted when the work does not require STR or customer facilities.

Requirements

• U.S. citizenship.
• Active U.S. security clearance.
• Bachelor’s degree in Computer Science or a related technical field and at least 8 years of work experience.
• Experience deploying software for Department of Defense or Intelligence Community missions.
• High sense of ownership and a track record of delivering high-impact work.
• Passion for crafting user-centric interfaces and keen attention to design details.
• Strong knowledge of modern technologies such as React, TypeScript, and Python.
• Knowledge of performance-focused tools and techniques for rendering large datasets and building responsive, smooth interfaces.
• Demonstrated ability to adopt new languages, libraries, and technologies.
• Organized and detail-oriented, with the ability to work independently and collaboratively.
• Demonstrated effectiveness communicating with technical and non-technical audiences.

Nice To Haves

• Active Top Secret security clearance with SCI eligibility.
• Advanced degree in Computer Science, Information Technology, or a related technical field.
• Prior U.S. military service with experience in joint planning, large force battle monitoring, and large force debrief best practices.

Responsibilities

• Break down use cases and user-defined problems, build MVPs, and rapidly evolve solutions into cohesive applications.
• Accelerate development of existing applications by adding workflows, improving scalability, making high-impact improvements, and addressing customer pain points.
• Develop high-performance, visually appealing frontend features that handle complex use cases and remain fast, smooth, and intuitive under heavy load.
• Lead cross-functional engineering teams to design, build, and deploy cohesive systems, integrating independent capabilities into existing solutions.
• Collaborate with end users and customers, typically military or Government operators, to understand requirements and translate them into software features.
• Apply product discovery best practices in working with customers.
• Travel to integration sites to deploy, test, and triage software in secure operational environments; average travel should not exceed one week per month.
• Lead software teams in designing, developing, and maintaining software systems deployed for operational use.
• Manage customer relationships while leading engineering teams to deliver products that meet high standards of quality, reliability, and performance.

What This Job Offers

• Job Type: Full-time
• Career Level: Principal