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 experienc