Senior Principal Software Engineer

Senior Principal Software Engineer

This is your opportunity to join the Receiver, Exciter & Processing Architecture (REPA) Department as a Senior Principal Software Engineer. The team's primary goal is to design, architect, and implement signal processing algorithms on a variety of high-performance processing platforms – including CPUs, FPGAs and GPUs, on COTS and semi-custom hardware platforms, for next generation radar systems deployed on land and sea.

What You Will Do:

• Investigate and implement on-prem LLM and agentic harness in a sandboxed environment
• Investigate moving the following activities to an AI agentic workflow:
• Develop real-time C++ and/or Cuda implementations of signal processing algorithms or control functions for sensor systems running on a distributed Linux backend.
• Write unit tests and integration tests to satisfy requirements.
• Analyze numerical correctness and runtime latency.
• Maintain high code quality by supporting code reviews and continuous integration.
• This 1st shift role will be 100% onsite and based in Marlborough, MA.

Qualifications You Must Have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience.
• C++ software development experience in Linux environments.
• Experience deploying on-prem LLM and agentic AI.
• The ability to obtain and maintain a U.S. government issued Secret security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Value:

• Experience developing GPU software - particularly with Nvidia Cuda - is highly desirable.
• Real-time software development experience.
• Experience with developer tools (Git, Cmake, Googletest, gdb, profiler, Jenkins, Jira).
• Experience with scripting (Python, shell, bash).
• Experience with Agile methodologies (Scrum, Kanban).
• Radar or DSP knowledge.
• Active / Existing Secret. U.S. Security Clearance.

What We Offer:

• Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.
• This position offers relocation based on candidate eligibility.