Sr Security engineer with Product Security & Mobile application(W2)

Sr Security engineer with Product Security & Mobile application(W2) Job Title: Sr Technical Security Engineer Location: Remote (US) Job Type: W2 Responsibilities & Qualifications • 5+ years of experience in application or product security, with a track record of securing desktop and mobile applications. • Experience with mobile (iOS/Android) and desktop (Windows/macOS/Linux) application security models. • Proficiency in GenAI security, modern cryptography, certificate management, secure authentication (OAuth, WebAuthn, FIDO2), and secure session handling. • Knowledge of OS-level hardening techniques, sandboxing, privilege separation, and secure use of platform APIs. • Hands‑on experience with secure coding practices in at least one systems language (C++, Rust, Go) and one application language (Kotlin, Swift, C#). • Familiarity with static/dynamic analysis tools, fuzzing, penetration testing, and reverse engineering for client applications. • Experience embedding security into the software development lifecycle (threat modeling, code reviews, secure design patterns). • Ability to manage incident response and vulnerability remediation for thick client environments. • Strong cross‑team communication skills and ability to write clear developer‑facing security guidelines. • Advanced degree (MS/PhD) in Computer Science, Cybersecurity, or related field. Preferred Experience • Contributions to open‑source client frameworks, SDKs, or application security tools. • Prior work with secure local storage, anti‑tampering, DRM, or obfuscation in client software. • Familiarity with offline‑first application security challenges (sync, caching, data persistence). • Experience with privacy‑preserving client design, including minimizing telemetry and preventing data leakage. • Deep understanding of reverse engineering techniques and defenses (e.g., code obfuscation, anti‑debugging, integrity checks). • Experience leading security architecture for a thick client application launch at scale. Seniority Level: Mid‑Senior level Employment Type: Contract Job Function: Information Technology Industry: IT Services and IT Consulting Apply tot his job