Cyber Software Engineer - Secret‑Clearance R&D Tools

CACI International Inc; Florham Park (NJ); On-site; USD 79,000 - 163,000; Full time

Job summary

CACI International Inc. is hiring a Cyber Software Engineer in the United States (New Jersey) to design and develop cyber tools, run demonstrations, and support DoD/IC missions.

The role requires strong Python/C++ skills and a SECRET clearance, with a focus on cyber operations, networking, and distributed systems. You will collaborate with multidisciplinary teams to transition prototypes into operational workflows, contribute to R&D efforts, and produce technical documentation for stakeholders.

Qualifications

• 3 years of hands-on experience in software design & development, cybersecurity R&D, systems analysis, or capability development.
• Active SECRET clearance
• Background in networking, distributed systems, or cyber operations concepts.
• Proficiency in Python and C/C++.
• Familiarity with networking and cyberspace modeling & simulation capabilities.
• Ability to work in research-oriented, fast-moving environments with multidisciplinary teams.
• Knowledge in Algorithms & Data Structures
• Understanding of networking concepts and protocols (e.g., TCP/IP, TLS).
• Systems engineering experience including profiling and code optimization (CPU, memory, latency).
• Experience with Python – incl. PyTorch, TensorFlow, sklearn, scipy, virtual environment management
• Experience with network programming and protocols: Socket programming such as TCP/UDP, routing protocols, L2/L3 tunneling.

Responsibilities

• Assist in the design and development of innovative cyber tools, techniques, and prototypes that advance next-generation cybersecurity and networking capabilities.
• Support integration and demonstration of experimental capabilities for customer engagements, including planning and execution of capability demonstrations.
• Assist in implementing and evaluating algorithms, automation approaches, analytics, and modeling techniques relevant to cyber missions.
• Assist with the design and implementation of realistic cyber-physical test environments to measure system resilience, performance, and operational utility.
• Collaborate with software engineers, systems engineers, data scientists, and mission operators to transition prototypes into operational workflows.
• Prepare technical documentation, status reports, experiment plans, and demonstration materials for internal and external stakeholders.
• Participate in technical reviews, program planning sessions, and cross-organizational coordination with CS&T leadership.

Skills

Python

C/C++

Networking concepts

Algorithms & Data Structures

Distributed systems

Team collaboration

Tools

PyTorch

TensorFlow

Scikit-learn

SciPy

Job description

CACI International Inc. is hiring a Cyber Software Engineer in the United States (New Jersey) to design and develop cyber tools, run demonstrations, and support DoD/IC missions.

The role requires strong Python/C++ skills and a SECRET clearance, with a focus on cyber operations, networking, and distributed systems. You will collaborate with multidisciplinary teams to transition prototypes into operational workflows, contribute to R&D efforts, and produce technical documentation for stakeholders.