Sr. Software Engineer Security Clearance

Position: Sr. Staff Software Engineer with Security Clearance
Description 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. 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 requirements will not be considered. We are seeking a Senior Staff Software Engineer to design, develop, and sustain high-quality software systems supporting advanced analysis and data processing workflows.

This role focuses on distributed systems, microservices, and real-time data pipelines, working closely with scientific and technical users in a mission-focused environment. The ideal candidate is a strong individual contributor with deep C++, C#, Java, JavaScript, or Python expertise, sound software engineering judgment, and the ability to collaborate across disciplines while influencing technical direction through example and mentorship.

Key Responsibilities
* Design, implement, and maintain high-quality software aligned with program and project objectives

* Work both independently and collaboratively with development teams to deliver complex features end to end

* Collaborate directly with advanced technical and scientific users to translate analysis needs into robust software solutions

* Ensure reliability, scalability, and performance of messaging systems and data pipelines

* Contribute to containerized, distributed microservice architectures, including development, deployment, and testing

* Design, implement, and maintain real-time or near-real-time data processing and streaming workflows

* Ensure reliability, scalability, and performance of messaging systems and data pipelines

* Identify technical risks and propose risk-reduction strategies to support program success

* Participate in and guide Agile development activities, including code reviews, design discussions, and sprint planning

* Promote strong engineering practices, including testing, documentation, and maintainability

* Mentor junior and mid-level engineers through technical collaboration and code reviews

* Champion comprehensive testing strategies, including unit, integration, and system testing

* Contribute to documentation, knowledge sharing, and clear technical communication

* Perform other duties as assigned
Requirements The following minimum qualifications are required for the position:
* Bachelor's degree in Computer Science, Engineering, Mathematics, Physical Sciences, or a related technical field

* 5+ years of professional software engineering experience

* Strong proficiency in Object-Oriented Programming, including modern language features and best practices

* Hands-on experience with microservice architectures and distributed systems

* Understanding of containerization (e.g., Docker, Podman) and orchestration (e.g., Kubernetes)

* Solid understanding of software engineering fundamentals, including design patterns, modularity, and maintainability

* Experience writing and maintaining automated tests

* Demonstrated ability to collaborate effectively across technical disciplines

* Strong attention to detail and commitment to high-quality, well-tested code

* Excellent verbal and written communication skills

* Professional experience working in Linux environments

* Experience using version control systems such as Git

* Ability to obtain and maintain a DoD security clearance Candidates who have any of the following skills will be preferred:
* Advanced degree (e.g., Masters) in Computer Science, Engineering, or Mathematics

* Experience working with remotely sensed data or scientific data…