Senior Software Engineer - Architecture & Systems Design

CACI International•Herndon, VA

1d•$94,400 - $198,200•Onsite

About The Position

Design, architect, and implement complex embedded RF systems as part of a multi-disciplinary team working on specialized tools, sensors, and communications devices for demanding applications. Contribute to software architecture decisions for inter-processor and microservice systems where your technical choices directly impact system performance, real-time behavior, and the ability to process high-rate RF data in resource-constrained environments. Work with engineers across the full embedded system stack—from signal processing algorithms to FPGA fabric, from application layer to hardware interfaces. Own technical design from initial architecture through production deployment, making practical trade-offs between competing constraints like schedule, performance, portability, and maintainability.

Requirements

5-7+ 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 related field
Strong proficiency in C++ development for embedded real-time systems, including concurrency, memory management, and optimization techniques
Demonstrated experience designing and implementing software architectures and communicating technical concepts through documentation and diagrams
Experience with multi-threaded application development and debugging concurrency issues, including race conditions in inter-processor and microservice architectures
Working knowledge of software design patterns and development methodologies for complex systems
Experience with modern build systems and DevOps tools (Conan, Docker, GitLab or similar)
Experience with performance analysis and debugging tools (vTune, perf, gdb, valgrind, or similar) to identify and optimize bottlenecks
Ability to make informed trade-offs between portability, performance, and architecture-specific optimizations

Nice To Haves

Experience with communications systems and digital signal processing, including filters, modulation/demodulation schemes, channel equalization, and forward error correction (FEC)
Experience with wireless communications protocols (3GPP, IEEE 802.11, IEEE 802.15)
Understanding of the signal processing pipeline from RF data collection through digital processing

Responsibilities

Design distributed software architectures spanning multiple processing domains (x86, ARM, FPGA fabric), defining communication patterns and data flows for real-time RF signal processing systems
Develop high-performance C++ frameworks for inter-processor communication in systems where latency and throughput are critical constraints
Create technical documentation including message sequence charts, UML class diagrams, and software architecture specifications that enable distributed teams to build complex systems correctly and efficiently
Design microservice architectures for x86 and ARM platforms, balancing modularity, performance, and resource constraints
Profile and optimize software for memory-bound and compute-bound workloads using tools like vTune, identifying bottlenecks and implementing measurable performance improvements
Work with signal processing engineers to design data pipelines that move RF samples from ADCs through filters, demodulators, and decoders
Develop debugging approaches for resource-constrained embedded systems where standard tools provide limited visibility
Build C++/Python test harnesses and unit tests that generate representative workloads, validate system behavior, and verify edge cases
Integrate modern development tools and practices including CI/CD pipelines, containerization, and build automation
Collaborate with FPGA engineers to define hardware/software interfaces that leverage programmable logic capabilities while maintaining software flexibility