Sr​/Senior Front End Software Engineer

Sci Tec, a Firefly Aerospace Company, is a dynamic non-traditional defense contractor that delivers advanced technologies in support of U.S. National Security and Defense. For the past forty-five plus years, we have supported Department of Defense customers by developing innovative remote sensing algorithms, tools, and techniques to deliver world-class data exploitation capabilities supporting missile defense; intelligence, surveillance, & reconnaissance; space domain awareness;

and aircraft survivability missions.

Important Notice: Sci Tec exclusively works on U.S. government contracts that require U.S. citizenship for all employees. Sci Tec cannot sponsor or assume sponsorship of employee work visas of any type. Further, U.S. citizenship is a requirement to obtain and keep a security clearance. Applicants that do not meet these requirement will not be considered.

We are seeking a Front End Software Engineer to design and build user-facing web applications that present complex, real-time data in a clear, reliable, and intuitive way. This role focuses on modern frontend development, performance, and usability for mission-critical systems that operate continuously.

The ideal candidate is a strong frontend engineer who cares deeply about code quality, user experience, and system reliability, and who works effectively alongside backend, platform, and systems engineers.

• Design, develop, and maintain frontend web applications using modern JavaScript frameworks
• Build responsive, intuitive, and performant user interfaces for real-time or near-real-time data
• Collaborate with backend and platform engineers to integrate APIs and data services
• Translate user and customer needs into clear UI designs and technical implementations
• Ensure frontend applications are reliable, maintainable, and testable
• Identify and remediate UI bugs, performance issues, and security concerns
• Participate in code reviews, design discussions, and Agile ceremonies
• Contribute to frontend architecture decisions, including state management and component design
• Write and maintain automated frontend tests
• Support documentation and knowledge sharing across teams
• Perform other duties as assigned

• Bachelor’s degree in Computer Science, Engineering, Mathematics, Physical Sciences, or a related technical field
• 5+ years of professional experience developing frontend web applications
• Strong proficiency in JavaScript and modern frontend frameworks such as React
• Experience with HTML5, CSS3, and responsive design
• Experience integrating frontend applications with REST or similar APIs
• Familiarity with frontend build tooling and package management
• Experience working in Linux environments and using Git
• Strong understanding of frontend architecture, modular design, and maintainability
• Attention to detail and commitment to high-quality, well-tested code
• Strong verbal and written communication skills
• Ability to obtain and maintain a DoD security clearance

Candidates who have any of the following skills will be preferred:

• Experience with Type Script
• Experience with Docker, Kubernetes, Openshift, and CICD frameworks
• Experience with Python, Unreal Engine and C++
• Experience building data-rich or real-time user interfaces
• Experience with state management libraries (Redux, Zustand, etc.)
• Experience with frontend testing frameworks (Jest, Testing Library, Playwright, Cypress)
• Familiarity with design systems and component libraries
• Experience with data visualization or geospatial tools (e.g., D3, Cesium, WebGL)
• Experience working in Agile software development environments
• Experience collaborating with UX/UI designers
• Active DoD security clearance

* Resumes, Cover Letters, and Applications which are generated by AI will not be considered for employment.

Colorado…