Jobs at Coupang

Design, build, and operate high-throughput, low-latency distributed systems and microservices. Own platform features that improve scalability, reliability, availability, extensibility, and performance. Establish architecture paradigms, API standards, and technical strategy across engineering teams. Lead technical modernization, migrations, observability, reliability initiatives, and infrastructure optimization while mentoring senior engineers into lead and staff roles.

Design, develop, and operate security automation workflows for detection, investigation, triage, and response at scale. Build SOAR integrations with SIEM, EDR, CTI, ticketing, and SaaS platforms; develop LLM-powered analysis and response capabilities; and improve reliability, scalability, monitoring, and operational performance of AI-SOC systems. Collaborate with SOC and incident response teams to implement automated detection scenarios and resolve production incidents.

Design and implement production-grade machine learning systems for counterfeit detection, commerce risk, logistics, fulfillment, and post-purchase applications. Translate business problems into ML solutions, develop scalable pipelines, define performance metrics, and own ML roadmaps. Collaborate with product, operations, and backend engineering teams while mentoring technical talent and driving innovation across complex global initiatives.

Build and operate scalable cloud backend and datacenter services using SRE practices. Develop observability, telemetry, monitoring, alerting, and infrastructure automation systems. Optimize system performance, reliability, and resource utilization; conduct root cause analyses and postmortems; troubleshoot hardware and software issues; implement security and compliance controls; and collaborate with engineering teams and vendors.

Leads architecture and development of high-scale Inventory and Promise platforms supporting inventory visibility, delivery-date promises, and fulfillment orchestration. Designs distributed microservices and machine learning pipelines, decomposes complex technical problems, improves performance and scalability, and provides technical leadership across teams. Mentors engineers, promotes engineering best practices, and contributes to highly available, fault-tolerant systems processing thousands of requests per second.

Lead the development and maintenance of large-scale distributed systems supporting e-commerce listings, fulfillment, settlements, and seller experiences. Collaborate with product, design, and engineering teams to establish architectural roadmaps, build resilient applications, test and debug software, improve platform performance, and drive innovation. Provide technical direction to junior engineers while delivering scalable, maintainable solutions for Rocket Growth programs.

Conduct penetration testing across web, mobile, API, and network environments; simulate threat actors through Red Team campaigns; identify vulnerabilities; and provide remediation guidance. Requires offensive security experience, proficiency with penetration testing tools, Linux, networking, command-line utilities, and programming. Cloud, threat modeling frameworks, offensive security certifications, and Korean-English fluency are preferred.

Continuously identify exposed digital assets, shadow IT, vulnerabilities, and attack paths across cloud, on-premises, IoT, and endpoint environments. Implement and operate attack surface management solutions, develop scanners and detection scripts, prioritize remediation, collaborate with infrastructure and development teams, and automate integrations using AWS and Python. Support proactive defense across large-scale global infrastructure.

Lead backend engineering for Coupang’s fulfillment picking systems. Design scalable microservices, distributed architectures, and machine learning pipelines supporting inventory and promise workflows. Lead complex cross-functional projects, decompose technical problems, optimize performance and fault tolerance, and operationalize highly available production systems. Mentor engineers, influence multiple teams, and promote engineering best practices across the organization.

Leads the technical vision and architecture for Coupang’s large-scale Ads Serving and ML Platform. Responsibilities include designing retrieval, ranking, auction, targeting, pacing, measurement, ML infrastructure, and online serving systems. The role drives modernization using generative AI, LLMs, real-time inference, and next-generation ML infrastructure while improving reliability, scalability, latency, efficiency, advertiser ROI, engagement, and revenue. It also requires cross-functional technical leadership, architecture influence, mentorship, and strategic investment planning across multiple organizations.

Partner with product, engineering, and business teams to build end-to-end analytical frameworks, data models, and pipelines. Produce dashboards and deep-dive analyses to monitor platform usage and performance, define and validate metrics, drive data governance, and deliver strategic recommendations. Mentor junior analysts and ensure reporting accuracy and analytical rigor across the organization.

Lead the design, modernization, and operation of large-scale enterprise identity and directory platforms. Responsibilities include engineering multi-domain Active Directory environments, integrating Entra ID and other cloud identity services, strengthening authentication and access management, improving reliability and security, resolving complex escalated issues, developing automation, and establishing architectural standards. The role partners with security, infrastructure, and platform teams to build scalable IAM capabilities across global, hybrid environments.

Lead and oversee the development and operations of AI infrastructure orchestration, focusing on team management, strategic vision, and technology integration.

Provide high-level administrative support to senior tech executives including complex international calendar management, meeting coordination across time zones, travel booking and expense reporting, event and meeting logistics, project coordination for team initiatives, presentation support, and ad-hoc special projects. Must proactively prioritize, streamline processes, and work autonomously in a fast-paced, global environment.

The Senior Staff Machine Learning Engineer will lead innovative AI engineering projects and optimize algorithms for e-commerce applications, collaborating across teams to drive significant business impact.

Lead database engineering and AI-driven automation for high-traffic e-commerce systems. Manage Aurora MySQL/PostgreSQL and multiple NoSQL stores, optimize performance, ensure 5-6 nines availability, build automation and self-healing using Python and AI, run on-call rotations, execute upgrades/migrations, and collaborate with dev, infra, and security teams.

The Senior Staff Backend Engineer will enhance cloud infrastructure's reliability and efficiency, design scalable systems, and collaborate across teams to improve architecture and deployment automation.

Lead architecture and implementation of scalable, low-latency data processing and serving infrastructure for real-time ad delivery. Build self-service data platform, benchmark and monitor performance, ensure high availability, capacity planning, incident response, and collaborate with cross-functional teams to deploy production data solutions on cloud platforms.

Lead design and implementation of a next-generation Resource Manager and AI developer tools. Build scalable, event-driven microservices, improve ML workflow orchestration, model management, and observability. Mentor engineers, drive architectural decisions, collaborate with product and compliance, and take end-to-end ownership for platform reliability, performance, and operations.

The Product Manager is responsible for defining the product strategy and lifecycle for the HPC compute platform, managing customer-ready compute products, and driving improvements to compute offerings based on enterprise AI workload requirements.