Senior Software Engineer

Unlock the power of Safety and Mission Critical Engineering with QDSS. We are seeking exceptional individuals to join our elite team- where your expertise will make an impact that matters. Elevate your career in a company dedicated to excellence and the pursuit of safety and mission success.

Quest Defense Systems and Solutions is seeking experienced a Senior Software Engineer to join to architect and evolve the core software platform supporting Full Authority Digital Engine Control (FADEC) systems. This role focuses on building scalable, reusable, safety-critical embedded software infrastructure that supports multiple engine programs and certification baselines. This is a platform-level engineering role emphasizing real-time determinism, modular architecture, certification alignment, and long-term product sustainability.

Due to the nature of the project all applicants must be US Citizens. This role is remote with a strong preference to be onsite in Endicott, NY.

Responsibilities:

• Architect and maintain reusable FADEC software platform components, including hardware abstraction layers (HAL), middleware, and RTOS integrations.

• Define high-level software requirements, decomposition, and traceability in compliance with DO-178C.

• Lead system and software architecture reviews to ensure alignment with safety, performance, and certification objectives.

• Develop and optimize embedded C software for real-time, mission-critical engine control applications.

• Support multicore processors, deterministic scheduling, and fault-tolerant architectures.

• Drive integration and verification strategies including SIL, HIL, and embedded target testing.

• Establish automated test and static analysis frameworks (e.g., VectorCAST, Parasoft) to support compliance and code coverage objectives.

• Contribute to CI/CD processes within a regulated DevOps environment.

• Collaborate with systems, hardware, controls, and safety engineering teams to ensure robust cross-system integration.

• Promote common software baselines and reusable frameworks across programs.

Required Skills:

• 8+ years of experience with FADEC or engine control systems.

• Strong background in high-level requirements definition and regulated software development (DO-178C or similar).

• Embedded software development experience in C for aerospace or defense applications.

• Experience with system architecture and mission-critical software design.

• Familiarity with Agile Scrum and DevOps practices in regulated environments.

• Experience with configuration management tools (Git, Bitbucket, Jira).

• US Citizenship

Desired Skills:

• 9+ years of engineering experience with a bachelor's degree in engineering or related discipline.

• Experience with RTOS environments and multicore embedded architectures.

• Experience with HIL/SIL testing and embedded systems integration.

• Knowledge of Modular Open Systems Architecture (MOSA) and XML-based interface standards.

• Experience generating certification-ready documentation and supporting audits.

• Experience with automated verification, static analysis, and code coverage tools.

• Onsite in Endicott, NY

The QDSS Advantage:

At QDSS our advantage is purpose-driven work, collaborative teams, and complex challenges that push boundaries and build lasting impact. You’ll grow your career while contributing to mission-critical programs that demand excellence and shape the future.

What You’ll Find Here

• Work That Matters – Next-generation, safety- and mission-critical projects where your contributions have real-world impact.

• Growth That’s Supported – Competitive compensation, employer-matched 401(k), certification assistance, and clear opportunities for advancement.

• A Culture That Works – A flexible, collaborative, and people-first environment where teamwork, innovation, and balance are valued.

Benefits Include

• Competitive pay, comprehensive medical/dental/life and disability coverage, 401(k) with employer match, professional development support, and a flexible, friendly workplace.

Full compensation package is based on candidate experience and certifications

Pay Ranges
$100,000—$130,000 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.