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Senior Software Engineer - Architecture & Systems Design

Job in Herndon, Fairfax County, Virginia, 22070, USA
Listing for: CACI International Inc
Full Time position
Listed on 2026-08-22
Job specializations:
  • Software Development
    Software Engineer, Embedded Software Engineer, Software Architect, C++ Developer
Salary/Wage Range or Industry Benchmark: 94000 - 198000 USD Yearly USD 94000.00 198000.00 YEAR
Job Description & How to Apply Below

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
  • 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 Dev Ops tools (Conan, Docker, Git Lab 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 (3

    GPP, IEEE 802.11, IEEE 802.15)
  • Understanding of the signal processing pipeline from RF data collection through digital processing
What You Can Expect

A culture of integrity. At CACI, we place character and innovation at the center…

Position Requirements
10+ Years work experience
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