Staff Backend Engineer(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 I ever live without Coupang?” Born out of an obsession to make shopping, eating, and living easier than ever, we are collectively disrupting the multi-billion-dollar commerce industry from the ground up and establishing an unparalleled reputation for being leading 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 / Staff Engineer on the Security Infrastructure team, you will build the platform that enables Coupang to win and grow our customers’ confidence while rapidly expanding and scaling our services. Specifically, you will work on our dynamic authorization engine, which manages the security risks of all our customer interactions by looking for signs of unusual or potentially malicious activity. This is a critical system which protects both our customers and our company against damage from malicious activity.  Our work supports teams across Coupang and thousands of microservices. We are looking for engineers who are passionate about building platforms at scale, with emphasis on usability, reliability and efficiency. The successful candidate will be a well-rounded engineer who balances strategic and design thinking with attention to detail in implementation and operations. If that sounds like you, come join us!     What You Will Do   In this role, you will:  * Develop our customer authentication and authorization platforms, and rapidly iterate while collaborating actively as part of a small, highly talented team.   * Partner with teams across the company to understand their current needs and future direction.  * Think systematically to identify technical solutions, balancing strategic goals and immediate impact.   * Demonstrate excellence in architecture and design, resulting in robust and scalable systems.   * Hands-on develop critical infrastructure components.    * Write back-end APIs in Java and Go, using industry-standard frameworks.  * Work across teams to drive platform adoption, helping teams prioritize ruthlessly and “move with urgency”.  * Dive deep into critical system issues, constantly raising the bar on Operational Excellence.  * Serve as a role model for other engineers and shape our team culture.    Minimum Qualifications   * Bachelor’s degree in computer science, engineering, business, management and information Services or related quantitative fields  * 5+ years of experience with product management, program management, or marketing channel management working utilizing Agile software development methodologies  * Deep-dive analytical skills that can take ambiguous problems and translate them into scoped features and projects  * Demonstrated ability to understand technical challenges and make educated trade-offs between time, resources, and business needs  * Excellent verbal and written communication skills with the ability to influence others without authority    Preferred Qualifications   * 8+ years of experience in product management, program management, or consulting is a plus  * Previous e-commerce or pricing domain experience  * Experience working in international environments and globally distributed teams  * Fluency in English  * SQL/HQL and/or technical development background a plus    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/

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 I ever live without Coupang?” Born out of an obsession to make shopping, eating, and living easier than ever, we are collectively disrupting the multi-billion-dollar commerce industry from the ground up and establishing an unparalleled reputation for being leading 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  At Coupang, we invest in providing the best product experience for our customers. The AI and Knowledge Engineering team’s mission is to provide the best possible technical solution to achieve the optimal experience for our customers. We innovate and advance the space of Knowledge Graphs, AI agents, LLMs, AIGC, ML, NLP, CV and multi-modal models. We are looking for engineers who want to work on cutting edge technology, that is the intersection of Semantic knowledge bases, AI agents, NLP, LLM, AIGC, ML and software engineering. Come join us to help create a world class team advancing the AI/NLP/AIGC/ML/LLM/RL/Knowledge Graph technologies.   What You Will Do  * Work on GenAI, AI agents' systems to solve complex eCommerce scenarios. * Develop large language and vision understanding/generation models for predictive and compound AI Models * Train foundational models that can help with building learning systems. * Define process and experiments for an E2E foundation model. * Build E2E AI pipelines for storing/servicing foundational models. * Mentor and guide team members on frameworks, methodologies related to data lakes, data normalization, dimension reduction, visualization, statistical models. * Ensure Model training is security, compliance aware. * Collaborate with cross-team members to understand the requirements ensuring the foundational models; knowledge captured aligns with the company’s overall AI strategy.    Basic Qualifications * 5+ years of demonstrated data science, experience in building large scale foundational models for eCommerce scenarios. * Expertise in large language model post-training and deployment. * Deep understanding of AI/LLM/AIGC/ML architecture. * Strong statistical/mathematical background in defining metrics, learning functions, and result analysis. * Significant experience in SQL, Python, PySpark, Scala and R * Proficiency in PyTorch/TensorFlow, Spark, BigQuery * Proficiency in AI coding Cursor/Windsurf/Claude Code/Codex. * Experience creating complex data visualization tools, frameworks, and techniques. * Experience in dimension reduction in big data. * Proficient in cloud analytical stacks [ Lakes, warehouse, ETL pipelines] * Experience with inference platforms in AWS, Azure, and other open-source platforms. * Result-oriented, with a bias towards customer obsession, flexibility, and impact. * Strong written and verbal communication and teamwork skills * Passion for Large language models, NLP, and Machine Learning at scale * Education: B.S, M.S in Computer science or Mathematics, or related field   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.    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

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++  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.  Job Overview:  As a Senior Staff Backend Engineer - Cloud Infrastructure, this role will focus on Cloud Platform Infrastructure, Services and processes at its best to enhance Cloud infrastructure reliability & system efficiencies, productivity, availability, scalability and system quality at 10X scale. This role will be responsible for diving deep into business problems, understanding current customer pain points, system domain, current Platform limitations (if exists) and then work closely with engineering teams / leaders to design and architect new system / services leveraging cloud infrastructure that can scale 10X better in terms of reliability, availability performance and efficiency. This includes providing system architecture artifacts, accountability on cloud infrastructure choices that can perform and scale at 10X level but are still efficient, guidance on using right machine type, network designs, deployment automation etc . You will be part of a Global team working from different locations but still works as a central connected unit.  Key Skills and Role Responsibilities:  * Strong experience on Cloud DevOps tools and coding (CI/CD, IaC, Terraform, Python, Cloud Formation, Ansible, GitHub, CircleCI, Jenkins and Infra Automation) * Self-service code development and end-to-end back cloud deployment automation for application stack. * Provide a roadmap and vision for scalable and robust growth for your cloud infrastructure and platform services to enable achieving 99.999% availability. * Strong technical analytical & design capability to understand common & shared platforms, web, & services API with underlying data to provide appropriate network, infrastructure recommendations * Strong working experience on Kubernetes, Docker, Linux and cloud services integrations. * 100% accountable for the reliable, scalable and optimized cloud architecture, design and platform services. * Serve as Cloud Engineering for Cloud infrastructure Architecture, Design and Deployment and maintenance for highly reliable and scalable applications. * Solves complex technical problems in Public Clouds (AWS, Azure, GCP) and Private Cloud environment and improves Operational Excellence. * Strong ability to dive deep to understand current cloud infra and systems architecture to provide strategic partnership and improvements on network usage, role management, CDN, domains and cloud infra security. * Analyze complex distributed production deployments and recommend ways to optimize performance and/or automate processes by managing continuous integration servers, utilizing monitoring and testing tools. * Identify opportunities to make disruptive improvements in cloud infrastructure usage, operations and services with high degree of systematic automation. * Possess expert knowledge in performance (sub millisecond latencies), scalability, availability (99.999% uptime), enterprise architecture best practices * Exert technical influence over multiple teams, increasing their productivity and effectiveness by sharing your deep knowledge and experience. * Strong problem-solving skills, analytical capabilities, and attention to details * Provide a roadmap and vision for scalable and robust growth for cloud infrastructure and platform services * Collaborate with customers, stakeholders and lead engineers on key mission-critical projects Preferred Qualifications:  * Bachelor's degree and/or Master's degree in Computer Science or equivalent with 15+ Years of strong hands-on experience in cloud platform engineering. * 10+ years of hands-on experience on system engineering, Cloud DevOps and Cloud SRE * 7+ years of hands-on experience leading system design, architecture leveraging AWS or Azure services * 10+ years of demonstrable hands-on experience building and operating infrastructure as code (IaC). Comfortable with many flavors of Linux * 10+ year’s of hands-on experience in building high-performance, highly-available and scalable distributed systems in the cloud. * 7+ year’s of hands-on experience in building and managing high-performance, highly-available and scalable Hybrid Cloud cloud environments . * Excellent cross-group collaboration, outstanding verbal and written communication. * AWS Certification Advance Architecting, Developing on AWS, * Strong hands-on experience on automating App stack deployments through IaC using Terraform, Python or Go. * 10+ years of hands-on experience as a Cloud Infra Engineering * Team leading experience * Excellent cross-group collaboration and communication skills    Basic Qualifications:  * Bachelor’s degree and 7+ years of total experience    * Ability to solve problems through creative thinking and partnerships with other teams    * Ability to attain challenging targets through goal-setting and personal drive     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  * 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: 8784