Sr Staff / Senior Front End Software Engineer

SciTec•Boulder, CO

3d•$120,000 - $175,000•Onsite

About The Position

SciTec, a wholly owned subsidiary of Firefly Aerospace, 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: SciTec exclusively works on U.S. government contracts that require U.S. citizenship for all employees. SciTec 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.

Requirements

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 work in person at the Boulder, CO office
Ability to obtain and maintain a DoD security clearance

Nice To Haves

Experience with TypeScript
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

Responsibilities

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