Staff Software Engineer (Mobile Security)

Location: Singapore, Singapore. Applicants must have a current right to work in Singapore and must not require visa sponsorship.

Company

OKX is a crypto exchange and developer of OKX Wallet, OKLink, and other blockchain products serving individual and institutional users.

What you will do

• Identify and mitigate vulnerabilities in mobile code, systems, and networks through manual review, automated tooling, and threat modelling.
• Manage application security tools, processes, alerts, and vulnerability detection workflows.
• Validate and triage Bug Bounty submissions and coordinate remediation with engineering teams.
• Produce security findings reports and present them to technical and management audiences.
• Promote secure coding practices across iOS and Android platforms and collaborate with development, operations, and compliance teams.
• Apply AI tools to security research, threat analysis, incident response, and vulnerability detection.

Requirements

• 5+ years of experience in mobile application security or offensive security.
• Hands-on expertise with iOS and/or Android platforms and a strong understanding of mobile and web application vulnerabilities.
• Code review experience with Kotlin, Swift, TypeScript, or JavaScript.
• Ability to create vulnerability proof-of-concepts, review patches, and coordinate remediation with repository owners.
• Experience building AI-assisted security workflows and codifying repeatable agent skills for production use.
• Strong analytical, problem-solving, verbal, and written communication skills.

Nice to have

• Experience developing mobile security SDKs for products with more than ten million daily active users.
• Experience with business risk control, threat intelligence, risk prevention, or countermeasures against black and grey industries.
• Reverse engineering experience with major mobile applications.
• Proficiency in ARM assembly and native or application-layer security countermeasures.
• Experience with device fingerprint recognition, device simulation, flashing, modification, or application cloning.

Culture & Benefits

• Competitive total compensation package.
• L&D programs and education subsidies.
• Team-building programs and company events.
• Wellness and meal allowances.
• Comprehensive healthcare schemes for employees and dependants.