Senior Software Engineer

Shape the future of innovation as we tackle cutting-edge projects that make a difference.  We’re not just in the business of engineering—we’re building a brighter future. Driven by creativity and a culture of excellence, we believe in the power of engineering to solve today’s challenges and create opportunities for tomorrow. What we do matters.

Quest Defense Systems and Solutions is seeking a highly skilled Sr. Software Engineer to join our team where we are building the foundational software components that enable next-generation avionics systems. The Core Services & Libraries (CS&L) team is responsible for developing shared libraries, I / O frameworks, and partitioned services that power multiple avionics applications. This role is ideal for a systems-minded engineer with deep low-level experience who can design robust, certifiable software architectures.

Due to the nature of this role- all candidate MUST be a U.S. citizen or US Person.

Key Responsibilities :

• Abstract and consolidate core functions into reusable libraries and frameworks
• Extract existing functionality from application code and refactor for shared use
• Design and implement an I / O framework supporting multiple protocols and data interfaces
• Define and maintain data dictionaries and I / O level specifications
• Collaborate with system architects to ensure ARINC-653 partitioning integrity
• Support certification activities through HLR / LLR documentation and DAL compliance
• Contribute to long-term strategy for scalable, maintainable software infrastructure

Required Skills & Qualifications :

Preferred Qualifications :

Why QDSS Solutions :

We’re a family-like-company. We are collaborative. We believe in embracing change. We believe in doing consistent good work. QDSS houses smart, curious and passionate about “making a difference” people.  Our company culture sets us apart from others as well as :

About Us

At QDSS, we are more than an engineering company—we are a force for innovation and positive change. With over 25 years of proven expertise in solving mission-critical challenges, we empower our team to push boundaries, combining deep industry knowledge, cutting-edge technology, and a collaborative "think tank" approach.

Our vision is to be the trusted partner of choice for our defense and aerospace clients, delivering secure, sustainable, and world-class solutions that build a brighter future.

Full compensation package is based on candidate experience and certifications

Pay Ranges

$14,000 — $165,000 USD

At Quest Defense Systems and Solutions , we don’t just build technology — we engineer the future. From next-generation aerospace solutions to cutting-edge defense systems, we tackle the toughest, mission-critical challenges that keep people safe and push the boundaries of innovation. This is where problem-solvers, innovators, and visionary thinkers come together to shape the future. With over 25 years of aerospace and defense engineering expertise, our commitment to delivering high-quality, transformative solutions sets us apart — not just as an industry leader, but as a driving force for impactful change. Together, we’re not just leading the industry — we’re revolutionizing it.

Quest Defense provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.