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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Engineer - Mission Sensors (Onsite) - **Company:** RTX - **Location:** Cedar Rapids, IA, United States - **Experience:** Expert - **Salary:** $107,500 - $204,500 - **Contract:** Permanent contract - **Skills:** Agile Methodology, JIRA, Automation of Tests, Software Debugging, Embedded Software, Ethernet, Formal Verification, Python (Programming Language), Scrum Methodology, Software Tools, Software Engineering, Software Requirements Analysis, Software Systems, Systems Integration, Test Execution Engine, Strategies of Testing - **Published:** November 13, 2026 - **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-IA-CEDAR-RAPIDS-182--1100-Cimmie-Ave-Ne--BLDG-182/Principal-Software-Engineer---Mission-Sensors--Onsite-_01889078 ## About the Role * Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience. * Experience working within Agile development teams. * Experience developing software requirements. * Experience with test automation using Python. * Familiarity with Embedded Software Development * Experience with leading and mentoring others * Experience with engineering tools such as DOORS, PREP, TLBD, ALM, JIRA, Enterprise Architect, or similar. * Hands-on experience in systems and software integration including experience with design, development, and testing of customer hardware and software systems & systems of systems of high complexity. * Experience interacting with development teams to resolve discrepancies and issues. * Experience with systems integration, test execution, and test results documentation. * Experience problem solving and debugging. Qualifications We Prefer: * Experience (military or civil aircraft) in avionics systems. * Avionics integration and lab test experience. * Embedded software integration experience. * Working knowledge / understanding of data busses and protocols (Ethernet, MIL-STD-1553B, and ARINC-429). * Experience with Software development in Ada (heavy focus of this role). ## Description Help ensure mission-critical avionics software performs flawlessly in the real world. As a Principal Software Engineer supporting mission sensors, weapons, and IFF (Identification Friendly or Foe) avionics systems, you'll play a key role in primarily developing requirements, tests, verification, along with software development and software integration that support aerospace and defense applications. You'll work within a highly collaborative Agile team, helping develop and translate requirements into robust software solutions and test strategies while supporting system integration and verification efforts. If you enjoy solving complex technical challenges, improving engineering processes, and working across disciplines to deliver reliable systems, this role offers an opportunity to make a meaningful impact. What You Will Do: * You will support software engineering activities within an Agile development environment, helping develop and translate system and software requirements into effective software, test and verification strategies. * You will develop automated and semi-automated test scripts using Python to validate software functionality and system performance. * You will update and maintain our Software products using Ada. * You will verify software builds in integrated lab environments and support formal verification events for major program deliveries. * You will collaborate with cross-functional engineering teams to refine system requirements and design solutions that meet customer needs. * You will present technical progress and status updates to Agile team members and engineering leadership. * You will contribute to improving test development processes, tools, and best practices while maintaining compliance with company standards. * You will help navigate through the bids & pursuits, adhering to Collins Processes. * Mentor younger engineers through Software Engineering tasks as a SME. What You Will Learn: * You will gain experience integrating Line Replaceable Unit (LRU) software supporting mission sensor and weapons avionics systems. * You will deepen your expertise across multiple phases of the aerospace systems lifecycle within a collaborative Agile environment. * You will strengthen your software engineering skills by supporting complex software development, verification and integration efforts. * If desired, you may have the ability to grow into Product Owner, Scrum Master, and/or Cost Account Manager type roles.