Senior Embedded Software Engineer

Engineers are the reason we exist—they’re the core of who we are. We don’t just build technology; we engineer the future. From next-gen aerospace to cutting-edge defense systems, our teams power the solutions that drive innovation, tackle mission-critical challenges, and keep people safe. This is where problem-solvers and big thinkers thrive. Quest Defense Systems & Solutions is seeking Senior Embedded Software Engineers to build the foundational software components that enable next-generation avionics systems. This 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. This effort will be in support of multiple key programs, including the Next Gen Flight Management System (FMS) program. Due to the nature of this role, all candidates must be US Citizens OR US Persons. Preference is onsite in Cedar Rapids, IA. Will consider remote candidates meeting all requirements. 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 Qualifications: 8+ years of experience in embedded software development and/or testing. Proven expertise in C++ and object-oriented design for embedded systems Working knowledge of I/O architecture, protocol handling, and data management Background in developing certifiable software (DO-178 DAL A preferred) Proficiency in HLR/LLR generation, review, and traceability Quick learner with strong initiative and drive Desired Skills: Strong experience with ARINC-653 partitioning and low-level application design Hands-on experience with VxWorks RTOS Familiarity with toolchains and CI/CD environments supporting configuration management and verification (Atlassian Suite, Jama, Coverity, Rapita, etc) Designed and implemented non-volatile data storage systems (e.g., EEPROM, flash, or NVRAM) for configuration or state retention Experience with persistent and transient log storage, including rollover and data retention policies Familiarity with log transport mechanisms (e.g., shared memory, I/O channels, or network-based telemetry) Experience developing or integrating ARINC 661 Cockpit Display Systems (CDS) and User Applications (UA) Familiarity with avionics data buses and communication protocols (e.g., ARINC-429, MIL-STD-1553, AFDX, CAN, SPI, UART, etc) Strategic systems thinker able to plan scalable, reusable frameworks Previous FMS Experience is a bonus but not required. Experience in the adoption and/or integration of emerging technologies (e.g., generative AI, automation platforms, digital assistants) into day-to-day operations for continuous improvement. Ideal Candidate: Technically strong software engineer who can balance deep systems knowledge with strategic foresight. One who understands how to design reusable building blocks for complex, safety-critical systems—and thrives in a fast-moving environment where architecture, certification, and execution come together. 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 $140,000 — $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.