Senior Cyber Software Engineer
- Salary
- $138,000 - $190,000
- Level
- Senior
Not stated in the posting: work type, visa.
Open. First seen 5 November 2026.
About the role
The Defensive Cyber Technologies (DCT) group at STR is seeking a Senior Cyber Software Engineer to develop software and technical capabilities that improve the security and resiliency of critical national defense systems. Our team hardens customer codebases, conducts cybersecurity assessments of operational software, and develops and applies first-of-its-kind cybersecurity tools to identify and remediate vulnerabilities before they affect mission-critical systems.
What you'll do:
- Work as part of a high-functioning team to apply advanced software engineering principles to develop robust, resilient software solutions for national security missions
- Perform comprehensive security assessments on operational software and mission-critical systems
- Identify, validate, and remediate vulnerabilities
- Design, build, and execute novel fuzzing campaigns to uncover security weaknesses
- Develop static and dynamic analysis tools to detect, report, and remediate vulnerabilities in software systems
- Communicate technical findings, risk, and remediation recommendations to engineering and customer stakeholders
Who you are:
- This position requires an Active Secret or Top Secret security clearance, for which US citizenship is needed by the US Government.
- Bachelors degree in Computer Science, or related field with a minimum 5 years of relevant professional experience (MS plus 3 years experience or PhD may be considered)
- Strong proficiency in C or C++ and the ability to learn and work effectively in additional languages as needed
- Strong systems programming foundation, including familiarity with OS internals, ABI/calling conventions, memory and process management, and assembly-level debugging
- Experience working with compiler and build toolchains such as LLVM/Clang, GCC, and CMake.
Nice to have:
- Experience with dynamic analysis and fuzzing tools, such as PIN, DynamoRio, and AFL++
- Proficiency in Rust
- Experience with container and virtualization technologies, such as Docker and QEMU
- Familiarity with reverse engineering and binary analysis using tools such as Ghidra, IDA Pro, Binary Ninja, or objdump
Pay Information
Full-Time Salary Range: $138,000 - $190,000
The salary range listed is based on external market data. Offers are based on factors, such as but not limited to, the candidate’s experience, education, training, key skills/critical skills, security clearances, and prevailing market and business conditions.
STR's standard text
STR is a growing technology company with locations near Boston, MA, Arlington, VA, near Dayton, OH, Melbourne, FL, Carlsbad, CA, Atlanta, GA, and Denver, CO. We specialize in advanced research and development for defense, intelligence, and national security in: cyber; next generation sensors, radar, sonar, communications, and electronic warfare; and artificial intelligence algorithms and analytics to make sense of the complexity that is exploding around us.
STR is committed to creating a collaborative learning environment that supports deep technical understanding and recognizes the contributions and achievements of all team members. Our work is challenging, and we go home at night knowing that we pushed the envelope of technology and made the world safer.
STR is not just any company. Our people, culture, and attitude along with their unique set of skills, experiences, and perspectives put us on a trajectory to change the world. We can't do it alone, though - we need fellow trailblazers. If you are one, join our team and help to keep our society safe! Visit us at www.str.us for more info.
STR is an equal opportunity employer. We are fully dedicated to hiring the most qualified candidate regardless of race, color, religion, sex (including gender identity, sexual orientation and pregnancy), marital status, national origin, age, veteran status, disability, genetic information or any other characteristic protected by federal, state or local laws.
If you need a reasonable accommodation for any portion of the employment process, email us at appassist@str.us and provide your contact info.
Pursuant to applicable federal law and regulations, positions at STR require employees to obtain national security clearances and satisfy the requirements for compliance with export control and other applicable laws.
What this role asks for
Particular to this role
CMake · Docker · Rust
Rare in STR's other 123 open postings.
Standard for security roles
Cybersecurity
Common in security postings at any company.
In most of STR's ads
C++
Named in most of its open postings, whatever the role.
55% of this description is written for the role. The rest is STR's standard text, folded away below.
Compared with STR's other open jobs.
See Software Engineer salaries in the United States →
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