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 develops 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. This role is remote with the possibility of up to 10% travel to Cedar Rapids, IA. 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