Backend Software Engineer

Description We exist to wow ourcustomers. 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 makeshopping, eating, and living easier than ever, we’re collectively disruptingthe multi-billion-dollar e-commerce industry from the ground up. We are one ofthe fastest-growing e-commerce companies that established an unparalleledreputation for being a dominant and reliable force in South Korean commerce. We are proud to have the bestof both worlds — a startup culture with the resources of a large global publiccompany. This fuels us to continue our growth and launch new services at thespeed we have been since our inception. We are all entrepreneurs surrounded byopportunities to drive new initiatives and innovations. At our core, we arebold and ambitious people that like to get our hands dirty and make a hands-onimpact. At Coupang, you will see yourself, your colleagues, your team, and thecompany grow every day. Our mission to build thefuture of commerce is real. We push the boundaries of what’s possible to solveproblems and break traditional tradeoffs. Join Coupang now to create an epicexperience in this always-on, high-tech, and hyper-connected world. Role Overview As part of our ApplicationInfrastructure org, this is a greenfield team that will impact complex Coupangworkflow systems. We need to create a set of systems that will allow rapidworkflow development for hundreds of domain teams, allowing critical infrastructurelike rocket delivery service. It is a highly visible system with hundreds ofmillions of dollars of revenue flowing through the systems. It is a chance todesign from scratch, and create a reliable workflow service at scale. We are looking for a Senior/StaffEngineer to lead the architectural design and implementation of ournext-generation durable execution platform. This team is tasked with building ahighly scalable, fault-tolerant system from scratch that enables developers towrite long-running, reliable workflows as code. At Coupang, we Aim High andFind a Way to solve impossible problems. You will be responsible for building asystem that doesn't just meet industry standards but sets them, ensuring 5-6nines availability while leveraging AI to automate complex system behaviors andself-healing capabilities What You Will Do ● Define Extreme Availability : Design for "5-6nines" (99.9999% availability). You will Dive Deep into the tail latenciesand edge cases of distributed state management to ensure our platform is alwayson for our customers. ● AI-Driven Automation : Integrate AI/ML models toautomate system functionality, including predictive scaling, automatedbottleneck detection, and intelligent error recovery, ensuring we Wow theCustomer through seamless platform performance and availability. ● Solve Hard Problems : Address challenges related todistributed locking, timers, and deterministic execution. You must BeData-Driven to validate architectural decisions against massive trafficpatterns. ● Stakeholder management - Workcross functionally with our product teams to provide infrastructure whichserves the company’s business needs Basic Qualifications ● Bachelor's degree in computer science, ElectricalEngineering, 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, particularlyAWS ● Demonstrated experience in building and maintaininghighly available, distributed systems Preferred Qualifications ● Extensive Experience : 12+ years of professionalsoftware development experience, specifically building backend infrastructurethat supports global-scale traffic. ● High Availability Mastery : Proven track record ofmanaging and maintaining systems with 5-6 nines of availability. You understandthat "good enough" isn't enough; we Focus on the Customer and theExperience by ensuring zero downtime. ● Distributed Systems Expert : Deep expertise indesigning and deploying mission-critical systems (e.g., databases, messagingqueues, or orchestration engines) from the ground up. ● Technical Mastery : Expert-level proficiency inJava, Python with deep understanding of concurrency and memory management. ● AI Integration : Experience or a strongarchitectural vision for using AI/ML to automate system-level functionality andoperational tasks. ● Specialized Knowledge : Deep familiarity with theTemporal or Cadence programming m…