Wireless Protocols Software Engineer

Job Title: Wireless Protocols Software Engineer

Job Category: Engineering

Time Type: Full time

Minimum Clearance Required to Start: None

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Continental US

Anticipated Posting End: 8/31/2026

CACI’s Wireless Solutions division is looking for a new team member with experience in digital signal processing and physical layer algorithms who is passionate about building the next generation of software-defined protocol processing frameworks and applications. Our team of approximately 20 engineers comprises a mix of digital signal processing experts, large-scale application developers, and wireless protocol experts who work together to create some of the most highly optimized, software-based, platform-independent protocol processing engines in the world. Our solutions, refined and advanced over two decades of development, allow for a mix of deployment options, ranging from low-power embedded SBCs to multi-core computing clusters with FPGA and GPU capabilities.

The ideal candidate for this position will have some previous experience in implementing digital signal processing (DSP) and physical layer (PHY) algorithms into either real world or theoretical applications. Multiple vacancies are posted for this position across various junior, mid-level, and expert levels of experience.

This is an on-site position at any of the referenced locations.

More About the Role:

• Define, design, implement, and test components of wireless protocol stacks, ranging from physical layer (PHY) algorithms to layer 2/layer 3 procedures

• Contribute to systems-level engineering discussions that reconcile the various use cases for our software in pursuit of best-in-class solutions

• Work with customers (both internal and external to CACI) to help integrate our solutions into a wide variety of applications and use cases

• Debug, test, and validate our capabilities using both unit tests as well as scenarios reported by our end users

Travel to other CACI locations and/or customer sites in the US as necessary (travel requirement is typically 0 - 15%)

What You Can Bring to Our Team:

• A drive to continuously improve and refine existing capabilities alongside new development opportunities.

• Ability to work with a distributed team and manage your time effectively across multiple, simultaneous projects.

• A strong understanding of modern C++ programming. We consider C++11 to be the minimum but love to use C++17/20 features where appropriate.

• Knowledge of wireless physical layer algorithms and their implementations, or an ability to learn and understand existing implementations.

• Code profiling experience, ability to identify critical code paths, and offer performance optimizations based on analysis over multiple scenarios.

• Experience using wireless test equipment in lab environments, including test setup design.

You’ll Bring These Qualifications:

• A bachelor’s degree (or higher) in Computer Science or Electrical Engineering or equivalent technical degree or an additional 4+ years of experience in lieu of degree.

• 0-2 years of related experience in either industry or an educational field.

• Experience with Signal Processing or DSP.

• Experience writing software for Linux-based operating systems

• C/C++ programming experience (or proven ability in an alternate object-oriented language) shown through project work or code examples.

• Demonstrated ability to read and understand technical specifications, and create software-based implementations of the procedures and methods described therein

• Excellent communication and interpersonal skills

Preferred Qualifications:

• Master’s degree in related field

• Familiarity with virtualization technologies and containerization (e.g., Docker, KVM).

• Previous experience with wireless protocols (e.g., 3GPP cellular protocols, IEEE wireless standards, and/or ITU/ETSI-defined mobile radio standards).

• Previous experience in developing applications with cellular LTE and NR protocols.

• The ability to obtain and maintain and US Government Clearance at the TS/SCI level.

What You Can Expect:

A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An environment of trust.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.

Pay Range :

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

The proposed salary range for this position is:

$63,800 - 127,500 USD

CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.