Senior Staff Software Engineer

About Coupang PlayCoupang Play is an OTT video streaming service. We offer a wide range of content, including Original Series, TV Shows, Movies, and Sports.We are in the business of delivering exceptional storytelling. We produce award-winning scripted and unscripted Original Series, such as "Boyhood", "Anna", and "SNL Korea". We believe Sports can also be elevated by creative storytelling. Play is now an authoritative destination for Sports, broadcasting K-League, La Liga, Bundesliga, F1, NFL, and other leading leagues and tournaments. We also offer some of the latest movies that were just released in local theaters, bringing more exceptional storytelling to our Customers.To ensure that we deliver all content seamlessly, we invest in Engineering, Product, and Design. Coupang Play is available on all mobile devices, tablets, PC, Smart TV, Apple TV, and Android TV. Our teams keep optimizing how Customers discover and stream both VOD and Live content. That includes investments in frontend, backend, and infrastructural developments. We also embrace Machine Learning to refine our CX.We are still very early in our growth stage. If you enjoy solving complex problems using industry-leading technology or unconventional business approaches, please join us. We are building a world-class team of problem-solvers, all dedicated to delivering exceptional storytelling to our Customers.Role OverviewWe're looking for a Tech Lead / Senior Staff Software Engineer to lead the development of our next-generation Ad Infrastructure, with a focus on building a Supply-Side Platform (SSP) and Ad Exchange from the ground up.In this role, you'll serve as the hands-on architect and technical owner of the ad infrastructure and backend services that power our advertising business for our streaming service. You'll lead system architecture, implementation, and technical strategy, while mentoring engineers and collaborating closely with cross-functional partners across Product, Business, and Ad Ops. What You Will DoDesign and own the architecture and roadmap for our ad infrastructure, including SSP and Ad Exchange components.Lead the development of scalable, low-latency auction systems and OpenRTB integrations.Mentor and grow a high-performing engineering team; establish best practices in code quality, system performance, and operational excellence.Collaborate with cross-functional stakeholders to align technical solutions with business goals and compliance requirements.Basic Qualifications10+ years of experience in backend or distributed systems engineering, including 3+ years as a Tech Lead driving complex, cross-team initiatives.Proven experience building an SSP or Ad Exchange from architecture to production scale, including OpenRTB integrations with major DSPs.Strong leadership in project planning, execution, code/design reviews, and mentoring senior engineers.Deep expertise in low-latency, high-throughput systems, performance profiling, and cost/performance trade-offs.Production experience with streaming and data systems.Proficiency in one or more backend programming languages (e.g., Go), with a strong understanding of cloud-native architectures.Strong knowledge of data infrastructure and storage systems.Track record of technical leadership and mentoring senior engineers.Excellent verbal and written communication skills.Preferred QualificationsExperience with advertising in video/CTV or OTT environments.Excellent verbal and written communication skills in English.Recruitment Process and Others   Recruitment Process   Application Review > 1st Online Interview > 2nd Online 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.     Coupang does not discriminate against disabled applicants or those with veteran status. We are proud to offer equal opportunities for all applicants.  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.  Privacy Notice   Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below.