Senior Staff Backend Engineer - Cloud Infrastructure

Coupang

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 e-commerce 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 entrepreneurs 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.  Role Overview  We are looking for experienced and innovative ML engineers with an entrepreneurial mindset to be part of the technical team pioneering in advance AI engineering for e-commerce scenarios at Coupang. We pioneer in innovative optimization techniques for AI reasoning and token completion models.   Basic Qualifications   * 8+ years of relevant experience  * Bachelors degree in Computer Science or related fields * 5+ years of experience in AI/ML and familiarity with the latest deep learning techniques  Preferred Qualifications   * 10+ years of relevant experience in technology companies or organizations * Knowledge in e-commerce or eagerness to learn * Experience applying Large Language Models or Large Image Models in an industry * Hands-on with ability to design and implement high-quality algorithms / systems independently * Ability to dive deep into the algorithms / systems and generate ideas of improvements * Ability to efficiently run experiments, analyze results, and quickly iterate * Solid track record of delivering big business impacts via technology innovations * Excellent communications and collaborations across teams and across functionalities  Some examples of the related projects: 1) Computer vision enabled e-commerce product enablement  2) Observability of model reasoning  3) Enabling new model architecture optimized for e-commerce Pay & Benefits  Our compensation reflects the cost of living across several US geographic markets. At Coupang, your base pay is one part of your total compensation. The base pay for this position ranges from $174,000/year to $299,000/year. Pay is based on several factors including market location and may vary depending on job-related knowledge, skills, and experience. Annual bonus is 0-20% of the base salary. General Description of All Benefits (Drafter: Please check with your team if any change on the benefit description)  * Medical/Dental/Vision/Life, AD&D insurance    * Flexible Spending Accounts (FSA) & Health Savings Account (HSA)   * Long-term/Short-term Disability    * Employee Assistance Program (EAP) program    * 401K Plan with Company Match    * 18-21 days of the Paid Time Off (PTO) a year based on the tenure    * 12 Paid Holidays    * Up to 6 weeks of Paid Parental leave    * Pre-tax commuter benefits    * MTV - [Free] Electric Car Charging Station     General Description of Other Compensation       “Other Compensation” includes, but is not limited to, bonuses, equity, or other forms of compensation that would be offered to the hired applicant in addition to their established salary range or wage scale.     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/privacy-policy/   Coupang is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, or gender (including pregnancy, gender identity, gender expression, sexual orientation, transgender status), national origin, age, disability, medical condition, HIV/AIDS or Hepatitis C status, marital status, military or veteran status, use of a trained dog guide or service animal, political activities, or affiliations, citizenship, or any other characteristic or class protected by the laws or regulations in the locations where we operate. If you need assistance and/or reasonable accommodation in the recruiting process due to a disability, please contact us at usrecruiting@coupang.com.    Job Requisition ID: 8845

Coupang

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 e-commerce 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 entrepreneurs 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.     Role Overview  As a Senior Staff Data Centre Observability and Site Reliability Engineer, you will design, build, and operate scalable observability and reliability solutions for large-scale datacenter infrastructure. This role focuses on developing high-performance monitoring and telemetry platforms, ensuring system reliability, and driving operational excellence through automation, performance optimization, and SRE best practices. The ideal candidate will work across the full service lifecycle—design, deployment, and continuous improvement—while collaborating with cross-functional teams to enhance visibility, resilience, and efficiency of critical systems. What You Will Do OBSERVABILITY AND MONITORING * Design, implement, and maintain observability solutions for datacenter infrastructure, including monitoring, logging, alerting, and telemetry systems. * Develop, deploy, and operate large-scale observability and telemetry platforms with a focus on real-time monitoring, high performance, and scalability. * Own and contribute to the full lifecycle of observability services—from design and development to deployment and ongoing optimization. * Build and enhance monitoring systems to ensure high availability, reliability, and performance of infrastructure. * Create and manage dashboards, alerts, and reports to provide clear visibility into system health, performance, and capacity trends. SITE RELIABILITY ENGINEERING (SRE) * Apply SRE principles and best practices to improve reliability, scalability, and operational efficiency of datacenter services. * Develop and maintain automation for infrastructure provisioning, monitoring, and system management. * Lead root cause analysis (RCA) and post-incident reviews, driving corrective actions to prevent recurrence and improve system resilience. PERFORMANCE OPTIMIZATION * Analyze system and application performance across the datacenter infrastructure to identify bottlenecks and improvement areas. * Implement optimization strategies to enhance performance, efficiency, and resource utilization. COLLABORATION * Partner with cross-functional engineering teams to understand observability and reliability requirements and deliver effective solutions. * Collaborate with hardware and software vendors to evaluate, integrate, and optimize new technologies within the ecosystem. SECURITY AND COMPLIANCE * Ensure observability and reliability solutions adhere to organizational security policies and industry standards. * Implement and maintain appropriate security controls to safeguard infrastructure, systems, and data. TROUBLESHOOTING AND SUPPORT * Provide hands-on support for observability and reliability issues, including debugging complex hardware and software problems. * Develop and maintain documentation, including troubleshooting guides and operational best practices, to support efficient issue resolution. CONTINUOUS IMPROVEMENT * Stay current with emerging trends, tools, and technologies in observability and SRE, and incorporate them into the platform. * Continuously enhance the scalability, reliability, and operational efficiency of datacenter services through proactive improvements.   Basic Qualifications * Bachelor’s or Master’s degree in Computer Science, Engineering, or a related technical field.  * 12+ years of progressive software engineering experience, with a heavy emphasis on distributed systems, cloud-native architectures, or platform operations.  * Proven experience in managing and optimizing large-scale datacenter environments * Strong proficiency in Go or Python, with a deep understanding of networked systems and performance optimization.  * Expert-level knowledge of Kubernetes internals (scheduling, controllers) and containerization ecosystems.  * Proven experience with load balancing, service mesh, and request routing at scale.  * Proficiency in observability tools and technologies (e.g., Prometheus, Grafana, ELK Stack). * Experience with SRE practices and tools (e.g., Kubernetes, Docker, Terraform). * Familiarity with cloud platforms (AWS, Azure, GCP) and their observability and reliability services   Preferred Qualifications  * Prior experience building infrastructure specifically for LLM inference or large-scale training clusters.  * Familiarity with inference, including mixed precision, kernel tuning, or custom hardware accelerators.  * Experience managing hybrid-cloud or multi-AZ deployments across AWS, Azure, or GCP.  * Experience operating in regulated environments with strict security and compliance requirements   Type of work model  * Hybrid Our Hybrid work model: Coupang hybrid work model is designed to enable a culture of collaboration that acts a catalyst to enrich the experience of employees. Employees are required to work at least 3 days in the office per week, with the flexibility to work from home 2 days a week, depending on the role requirement. Some businesses may require more time in office due to nature of work.   Details to consider  * Those eligible for employment protection (recipients of veteran’s benefits, the disabled, etc.) may receive preferential treatment for employment in accordance with applicable laws.    Privacy Notice   * Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below. https://privacy.coupang.com/en/land/jobs/

Coupang

DESCRIPTION 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 e-commerce 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 entrepreneurs 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. Role Overview As part of our Application Infrastructure org, this is a greenfield team that will impact complex Coupang workflow systems. We need to create a set of systems that will allow rapid workflow development for hundreds of domain teams, allowing critical infrastructure like rocket delivery service. It is a highly visible system with hundreds of millions of dollars of revenue flowing through the systems. It is a chance to design from scratch, and create a reliable workflow service at scale. We are looking for a Senior/Staff Engineer to lead the architectural design and implementation of our next-generation durable execution platform. This team is tasked with building a highly scalable, fault-tolerant system from scratch that enables developers to write long-running, reliable workflows as code. At Coupang, we Aim High and Find a Way to solve impossible problems. You will be responsible for building a system that doesn't just meet industry standards but sets them, ensuring 5-6 nines availability while leveraging AI to automate complex system behaviors and self-healing capabilities What You Will Do * Define Extreme Availability: Design for "5-6 nines" (99.9999% availability). You will Dive Deep into the tail latencies and edge cases of distributed state management to ensure our platform is always on for our customers. * AI-Driven Automation: Integrate AI/ML models to automate system functionality, including predictive scaling, automated bottleneck detection, and intelligent error recovery, ensuring we Wow the Customer through seamless platform performance and availability. * Solve Hard Problems: Address challenges related to distributed locking, timers, and deterministic execution. You must Be Data-Driven to validate architectural decisions against massive traffic patterns. * Stakeholder management - Work cross functionally with our product teams to provide infrastructure which serves the company’s business needs Basic Qualifications * Bachelor's degree in computer science, Electrical Engineering, Math, or a closely related field * 8 years+ of experience in backend software development * Proficiency in Java and the Spring Framework * Experience working in cloud environments, particularly AWS * Demonstrated experience in building and maintaining highly available, distributed systems   Preferred Qualifications * Extensive Experience: 12+ years of professional software development experience, specifically building backend infrastructure that supports global-scale traffic. * High Availability Mastery: Proven track record of managing and maintaining systems with 5-6 nines of availability. You understand that "good enough" isn't enough; we Focus on the Customer and the Experience by ensuring zero downtime. * Distributed Systems Expert: Deep expertise in designing and deploying mission-critical systems (e.g., databases, messaging queues, or orchestration engines) from the ground up. * Technical Mastery: Expert-level proficiency in Java, Python with deep understanding of concurrency and memory management. * AI Integration: Experience or a strong architectural vision for using AI/ML to automate system-level functionality and operational tasks. * Specialized Knowledge: Deep familiarity with the Temporal or Cadence programming models and their underlying architecture. Experience in Kubernetes and containerization. * Stateful Database Experience: Experience with Cassandra and TiDB preferred * Observability Expert: Expertise in building highly observable systems using distributed tracing and advanced telemetry to proactively identify issues.   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 role is open to Singapore Citizens and Permanent Residents only  * 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.    Privacy Notice    Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below.      https://privacy.coupang.com/en/land/jobs/