Staff Engineer - Backend (Post Purchase Experience)

About this role

<p><strong><span data-contrast="auto">Company Introduction</span></strong><span data-contrast="auto"> </span><span data-ccp-props="{"134233279":true,"134245417":false}"> </span></p> <p><span data-contrast="auto">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. </span><span class="Apple-converted-space"> </span><span data-ccp-props="{"134233279":true,"134245417":false}"> </span></p> <p><span data-contrast="none">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.</span><span class="Apple-converted-space"> </span><span data-ccp-props="{"134233279":true,"134245417":false}"> </span></p> <p><span data-contrast="auto">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. </span><span data-ccp-props="{"134233279":true,"134245417":false}"> <br></span><span data-contrast="auto"> </span><span data-ccp-props="{"134233279":true,"134245417":false}"> </span></p> <p><strong><span data-contrast="auto">Role Overview</span></strong> </p> <p><span data-ccp-props="{"134245417":false}">The C-Returns Platform team owns the end-to-end lifecycle of cancellations, returns, and exchanges for Coupang's e-commerce ecosystem. We process millions of post-purchase resolution requests through our customer facing Coupang App and CS/back-office channels, serving both Korea and Taiwan markets. Our platform is mission-critical infrastructure that directly impacts:</span></p> <ul> <li><span data-ccp-props="{"134245417":false}">Customer satisfaction — making post-purchase resolution fast, transparent, and predictable</span></li> <li><span data-ccp-props="{"134245417":false}">Inventory protection — minimizing inventory loss through structured collection logistics, QA inspections, and time-bound auto-withdrawal policies</span></li> <li><span data-ccp-props="{"134245417":false}">Business agility — enabling rapid policy changes through event-driven architecture with visibility and adaptability<br></span></li> </ul> <p><strong><span data-contrast="auto">What You Will Do</span></strong><strong> </strong></p> <ul> <li><span data-contrast="none"><span data-ccp-charstyle="normaltextrun">Build and maintain Tier 1 & Tier 2 services that handle 500K+ requests/day across multiple microservices</span></span></li> <li><span data-contrast="none"><span data-ccp-charstyle="normaltextrun">Design and implement complex business workflows using Activiti BPMN and Temporal Cloud for orchestrating cancellations, returns, exchanges, and refunds</span></span></li> <li><span data-contrast="none"><span data-ccp-charstyle="normaltextrun">Integrate with 15+ upstream and downstream systems including Order, Shipment, Payments, Transport.</span></span></li> <li><span data-contrast="none"><span data-ccp-charstyle="normaltextrun">Implement policy-driven business logic that adapts to frequently changing cancellation, return, and refund rules</span></span><span data-contrast="none"><span data-ccp-charstyle="eop" data-ccp-charstyle-defn="{"ObjectId":"920dbcde-2834-5e15-a5fa-062170b236ba|1","ClassId":1073872969,"Properties":[201342446,"1",201342447,"5",201342448,"3",201342449,"1",469777841,"맑은 고딕",469777842,"Arial",469777843,"新細明體",469777844,"맑은 고딕",201341986,"1",469769226,"맑은 고딕,Arial,新細明體",268442635,"24",469775450,"eop",201340122,"1",134233614,"true",469778129,"eop",335572020,"1",469778324,"Default Paragraph…