Senior iOS CNO Engineer | TS/SCI Clearance

Cornerstone Defense LLC; Annapolis (MD); On-site; USD 185,000 - 205,000; Full time

Benefits offered by this job

MedicalDentalVision

PTO

401(k)

HSA/FSA

Life and Disability Insurance

Tuition Reimbursement

Perks at Work

Referral Program

Travel Assistance

Financial & Legal Services

Job summary

Cornerstone Defense LLC is seeking a highly motivated CNO Developer (iOS) to join our Annapolis Junction team. You will work on mission-critical cyber operations, applying deep iOS internals knowledge and low-level development skills in constrained environments.

The role requires strong C/C++ expertise, experience with reverse engineering, and the ability to analyze binaries without symbols. Collaboration in a small, fast-paced team is essential.

Qualifications

• Strong iOS internals experience and OS architecture understanding.
• Reverse engineering with IDA Pro or Ghidra.
• Ability to analyze binaries without symbols.
• Proficiency in C and C++ for low‑level development.
• Experience in constrained or security‑sensitive environments.
• Ability to design, implement, test, and maintain complex capabilities end‑to‑end.

Responsibilities

• Develop, test, and maintain CNO tools for mission-focused iOS operations.
• Analyze OS internals and system‑level behavior to create advanced capabilities.
• Work in small, high‑trust teams to deliver solutions for cyber operations.

Skills

IOS internals

Reverse engineering

Binary analysis

C/C++

Embedded/security

End-to-end design

Education

Bachelor's degree in computer science or related field

Tools

IDA Pro

Ghidra

Job description

Cornerstone Defense LLC is seeking a highly motivated CNO Developer (iOS) to join our Annapolis Junction team. You will work on mission-critical cyber operations, applying deep iOS internals knowledge and low-level development skills in constrained environments.

The role requires strong C/C++ expertise, experience with reverse engineering, and the ability to analyze binaries without symbols. Collaboration in a small, fast-paced team is essential.