Senior Embedded Software Engineer

About the role

CACI is looking for a Senior Embedded Software Engineer in Herndon to design, architect and implement complex embedded RF systems as part of a multi-disciplinary team building specialized tools, sensors and communications devices. The engineer contributes to software architecture decisions for inter-processor and microservice systems, owns technical design from initial architecture through production deployment, and works across the full embedded stack from signal processing algorithms to FPGA fabric.

Key responsibilities

• Design distributed software architectures spanning x86, ARM and FPGA fabric, defining communication patterns and data flows for real-time RF signal processing systems.
• Develop high-performance C++ frameworks for inter-processor communication and design microservice architectures for x86 and ARM platforms.
• Create technical documentation such as message sequence charts, UML class diagrams and software architecture specifications.
• Profile and optimize software for memory-bound and compute-bound workloads using tools like vTune.
• Work with signal processing engineers to design data pipelines moving RF samples from ADCs through filters, demodulators and decoders.
• Build C++/Python test harnesses and unit tests, and develop debugging approaches for resource-constrained embedded systems.
• Integrate CI/CD pipelines, containerization and build automation, and collaborate with FPGA engineers on hardware/software interfaces.

Required profile

• 7+ years of professional software engineering experience in embedded systems and/or high-performance computing in Linux-based environments.
• BS or MS in Computer Science, Software Engineering, Electrical or Computer Engineering or a related field.
• US citizenship required.
• Desired: experience with communications systems, digital signal processing and wireless protocols (3GPP, IEEE 802.11, IEEE 802.15).

Required skills

• Strong C++ for embedded real-time systems, including concurrency, memory management and optimization.
• Multi-threaded application development and debugging of race conditions.
• Software design patterns and modern build systems and DevOps tools (Conan, Docker, GitLab or similar).
• Performance analysis tools (vTune, perf, gdb, valgrind or similar).

What we offer

• Proposed pay range of $113,200 - $237,800 depending on location, experience and skills.
• Healthcare, wellness, financial, retirement, family support, continuing education and time off benefits.
• Flexible time off and learning resources.