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Senior Software Engineer - Architecture & Systems Design

CACI International Inc
United Statesfull_timeVerifiedPosted 7 Aug 2026
💰 $198,200/yr($94,400/yr$198,200/yr)

About the role

Job Title: Senior Software Engineer - Architecture & Systems Design

Job Category: Engineering

Time Type: Full time

Minimum Clearance Required to Start: None

Employee Type: Regular

Percentage of Travel Required: None

Type of Travel: None

* * *

The Opportunity:

  • 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


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


Qualifications:
Required: 

  • 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
  • Must be a US Citizen


Desired:

  • 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

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Company

CACI International Inc

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