Senior Staff Security Engineer - Mobile Security, Digital Trust

Company Introduction 

We exist to wow our customers. We know we’re doing the right thing when we hear our customers say, “How did we ever live without Coupang?” Born out of an obsession to make shopping, eating, and living easier than ever, we’re collectively disrupting the multi-billion-dollar e-commerce industry from the ground up. We are one of the fastest-growing ecommerce companies that established an unparalleled reputation for being a dominant and reliable force in South Korean commerce.

We are proud to have the best of both worlds — a startup culture with the resources of a large global public company. This fuels us to continue our growth and launch new services at the speed we have been since our inception. We are all entrepreneurial surrounded by opportunities to drive new initiatives and innovations. At our core, we are bold and ambitious people that like to get our hands dirty and make a hands-on impact. At Coupang, you will see yourself, your colleagues, your team, and the company grow every day. 

Our mission to build the future of commerce is real. We push the boundaries of what’s possible to solve problems and break traditional tradeoffs. Join Coupang now to create an epic experience in this always-on, high-tech, and hyper-connected world.

Job Overview

We are looking for an Mobile Security Specialist to establish and lead mobile security across the company, covering consumer-facing applications as well as seller, rider and logistics mobile products.

This will initially be a highly hands-on senior IC role. The person will be expected to understand the mobile threat landscape, identify systemic risks, build scalable security processes, and influence senior engineering leaders to improve the security posture of mobile applications across multiple organizations.

Key Responsibilities

Mobile Threat Landscape and Strategy

• Build and maintain a comprehensive view of mobile threats, attack paths and systemic control gaps across the company's mobile estate.
• Define the target mobile security posture, priorities and longer-term roadmap.
• Track relevant changes in iOS, Android and mobile exploitation techniques and translate them into concrete security requirements.

Security Architecture and Standards

• Define practical security standards for iOS and Android, including application integrity, device trust, authentication, credential protection, local data, WebViews, deep links and third-party SDKs.
• Identify recurring weaknesses across applications and drive platform-level solutions rather than repeated app-specific fixes.
• Provide senior technical judgement on complex vulnerabilities, incidents and architectural decisions.

Security Assessment and Review Program

• Build a repeatable, evidence-based process for assessing mobile application security.
• Own and run the mobile security review program, including methodology, prioritization, acceptance criteria and escalation.
• Improve the program over time through automation, engineering self-service and better measurement of security coverage and residual risk.

Cross-Organization Influence

• Act as an agent of change for mobile security across engineering teams.
• Work directly with Senior Directors, Principal Engineers and senior mobile leaders to influence architecture, engineering practices and investment priorities.
• Drive security improvements across organizational boundaries without relying on formal authority.

Function Building and Leadership

• Start as a deeply hands-on technical leader, working directly with applications, code, devices and security controls where required.
• Establish the operating model for mobile security and identify where additional specialist capability is needed.
• Over time, help build and manage a small specialist mobile security team.

Qualifications

• Deep hands-on mobile security expertise across both iOS and Android, ideally developed in a large-scale consumer technology environment.
• Strong practical experience in areas such as mobile application security, reverse engineering, app integrity, device trust, authentication, secure storage, IPC, WebViews, deep links, networking and abuse resistance.
• Experience building or running a mobile security assessment or review program, rather than only performing individual reviews.
• Strong software engineering background, ideally including production mobile development or development of mobile security tooling.
• Demonstrated ability to identify systemic issues across multiple applications and translate them into reusable platform controls, standards or engineering frameworks.
• Proven experience influencing senior engineers and engineering leaders across organizational boundaries.
• Experience with product security architecture and threat modelling at significant scale.
• Evidence of driving changes in engineering practice, not only identifying security issues.
• Prior people management is useful but not required. Strong technical leadership and the ability to grow into management are more important for the initial phase of the role.

Recruitment Process and Others 

Recruitment Process  

• Application Review - Phone Interview - Onsite (or Virtual Onsite) Interview – Offer 
• The exact nature of the recruitment process may vary according to the specific job and may be changed due to scheduling or other circumstances.
• Interview schedules and the results will be informed to the applicant via the e-mail address submitted at the application stage. 

Details to Consider  

• This job posting may be closed prior to the stated end date for application if all openings are filled.
• Coupang has the right to rescind an offer of employment if a candidate is found to have submitted false information as part of the application process.
• Those eligible for employment protection (recipients of veteran’s benefits, the disabled, etc.) may receive preferential treatment for employment in accordance with applicable laws.
• Job titles and responsibilities may be subject to change depending on the candidate’s overall experience, etc. This will be communicated to the candidate at the appropriate time before the offer.
• Hiring may be restricted in case the legal qualifications required for hiring and work performance is not met.
• This is a full-time regular position and includes 12 weeks of probation period; provided, however, the probationary period may be either skipped, shortened or extended if necessary for business purposes

Privacy Notice  

• Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below. 
• https://www.coupang.jobs/en/privacy-policy/

Document Return Policy

1. This notification is given pursuant to Article 11 (6) of the Fair Hiring Procedure Act.
2. A job applicant, who has applied but not been finally selected for a position at Coupang (the “Company”), may request the Company to return his/her hiring documents submitted pursuant to the Fair Hiring Procedure Act. However, this will not apply where the hiring documents were submitted via the website of the Company or e-mail, or where the job applicant submitted those documents voluntarily without a request from the Company. In addition, if the hiring documents were destroyed due to a natural disaster or any other reasons not attributable to the Company, such documents will be deemed to have been returned to the job applicant.
3. A job applicant who wishes to request the return of his/her hiring documents pursuant to the main sentence of paragraph 2 above should fill out a “Request for Return of Hiring Documents” [Annex Form No. 3 in the Enforcement Rule of the Fair Hiring Procedure Act] and submit It by email ([email protected]). In such case, within fourteen (14) days from the date of identifying the receipt of the request, the Company will send the hiring documents to the job applicant’s designated address via registered mail. Please be informed that the job applicant is required to pay the postage on the registered mail.
4. In preparation for a job applicant’s request for the return of hiring documents pursuant to the main sentence of paragraph 2 above, the Company shall retain the original hiring documents submitted by the job applicant for 180 days from the completion of the recruiting process. If no request is made until the end of this period, all his/her hiring documents will be destroyed immediately in accordance with the Personal Information Protection Act.
5. The above paragraphs 1 - 4 shall only apply when the labor-related laws of Korea govern the application. They are otherwise not applicable.