Quest Defense Systems & Solutions is seeking 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 U.S. citizens or U.S. persons. Work can be done remotely with up to 10% travel to Cedar Rapids, IA. All candidates must reside in the United States. 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: 4+ 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. 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.