Software Development Engineer in Test (SDET)

Location: Lexington, MA Onsite (5 days/week)
Travel: Up to 5% domestic travel
Clearance: Active Secret clearance preferred; must be eligible to obtain
Must be a US citizen due to the nature of the work.

Overview
The client is seeking a Software Development Engineer in Test (SDET) to support the development of advanced cryptography and key management solutions for embedded and enterprise prototype systems.
This team consists of multidisciplinary experts across software, hardware, cybersecurity, and systems engineering, focused on solving complex national security challenges through innovative R&D.
This role offers the opportunity to contribute across the full software lifecycle—from concept and design to testing, prototyping, and deployment—while working in a highly collaborative, mission-driven environment.

Key Responsibilities

Lead and execute software testing strategy across development efforts
Design and implement test infrastructure and automation frameworks
Develop and maintain:
- Unit tests
- Integration tests
- Static analysis testing
- Dynamic analysis (e.g., fuzz testing)
Support continuous integration (CI) pipelines and testing workflows
Perform defect triage, debugging, and remediation
Collaborate with cross-functional teams on system architecture and design
Produce and maintain technical documentation to support certification efforts
Contribute to hardware/software integration and system-level validation

Required Qualifications

4+ years of experience in:
- Software development and testing
- Software/algorithm development
- Software design and documentation
Strong programming skills in C and C++ (C++ required)
Experience with object-oriented design and modern software development practices
Solid understanding of:
- Software testing methodologies
- Static and dynamic analysis techniques
- Hardware/software integration
Experience with Git and modern development workflows (branching, pull requests, etc.)
Strong written and verbal communication skills
Ability to work in small, collaborative teams with evolving requirements
Bachelor’s degree in Computer Science, Computer Engineering, or related field (or equivalent experience)

Preferred Qualifications

Experience with Rust or willingness to quickly learn
Familiarity with:
- Agile/Scrum methodologies
- Issue tracking tools and CI/CD pipelines
Experience with static and/or dynamic analysis tools
Exposure to:
- Cryptography (e.g., OpenSSL, TLS)
- Networking protocols (e.g., TCP/IP, IPSec)
Background in structural modeling and analysis

What You’ll Bring

Passion for solving complex technical challenges
Ability to rapidly learn new technologies and tools
Strong analytical and problem-solving skills
A collaborative, team-oriented mindset
Interest in contributing to high-impact national security initiatives