Sr Full Stack UI Engineer

Sci Tec, 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: Sci Tec exclusively works on U.S. government contracts that require U.S. citizenship for all employees. Applicants that do not meet this requirement will not be considered.

We are seeking a Full Stack Software Engineer to design, develop, and maintain user-facing web applications and supporting backend services for real-time data and geospatial information systems. This role focuses on building reliable, visually intuitive, and high-performance applications that operate continuously in mission-critical environments.

The ideal candidate is comfortable working across the stack—from frontend user interfaces to backend data pipelines—and thrives in a collaborative, Agile development environment.

• Design, develop, and maintain frontend and backend software, including code, tests, and documentation
• Build and integrate user interfaces and data pipelines for real-time and geospatial data visualization
• Design, prototype, and implement user‑centric interfaces that translate customer needs into intuitive solutions
• Maintain and improve 24/7 user‑facing applications that display, manage, and monitor real‑time data
• Identify and resolve software defects and security vulnerabilities
• Collaborate with team members during Agile ceremonies, including standups, sprint planning, and retrospectives
• Contribute to architectural discussions and technical design decisions
• Ensure adherence to software engineering best practices, including code quality, testing, and maintainability
• 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
• 2+ years of professional experience developing user-facing web applications, including systems that operate continuously (24/7)
• Strong experience with JavaScript, including React, Node.js, and Redux
• Experience developing and maintaining applications that handle real-time data
• Proficiency working in Linux environments and using Git
• Solid understanding of software engineering principles, including modularity, maintainability, and testability
• Strong attention to detail and commitment to high-quality code
• Excellent 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:

• Advanced degree in Computer Science, Engineering, Mathematics, or Physical Sciences
• Experience with Type Script
• Experience developing geospatial or mapping applications, including Cesium
• Experience creating or contributing to design systems
• Experience with UI/UX prototyping tools (e.g., Figma, Adobe XD, Axure)
• Experience working across the stack with Python and/or C++
• Familiarity with messaging and streaming technologies, such as:
  Protocol Buffers, ZeroMQ, Kafka, gRPC, REST APIs
• Experience with microservice architectures
• Professional experience with Dev Ops and CI/CD tools, including:
  Docker, Jenkins, Git Lab CI/CD
• Experience with databases and data stores such as SQL, Postgre
  
  SQL, Redis
• Experience working with remotely sensed data, including OPIR, EO/IR, SAR, Spectral, or RF
• Active DoD security clearance
• Resumes, Cover Letters, and Applications which are generated by AI will not be considered for employment.

Colorado Residents:
In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.

Sci Tec offers a highly competitive salary and benefits package, including:

• 4%…