Skip to main content

[Search Discoverability]Principal Ranking Engineer(Java)

Beijing, China Job ID: 1871542


We are looking for people who are passionate about solving complex real-world problems, building world-class solutions, and benefitting millions of lives. At Coupang, developers learn from one another—we share knowledge and spur each other on to come up with great ideas—and move extremely fast to create profound impact together. You will also have the opportunity to tackle large-scale challenges that arise as we grow. This includes building in-house technology, innovating mobile architecture, and advancing possibilities with machine learning and deep learning. With you, we will build a world where our customers ask, “How did we ever live without Coupang?”

Success Profile

  • Team Player
  • Adaptable
  • Inventive
  • Self-starter
  • Problem Solver
  • Goal-oriented
  • Quick-thinking


Job ID 1871542 Date posted  09/18/2019 Location Beijing, China


Coupang 是全球最大也是发展速度最快的电商平台之一。其使命是让顾客无法想象“如果离开了Coupang该如何生活?”为了创造这个新世界,我们正在寻找满怀热情共同实现这一追求的人才。助力于世界尖端技术和运营体系,我们正致力于彻底改变顾客的点对点终端体验,从引进革命性的最后一公里配送,到潜心探索如何在一个以移动端为核心的平台上优化顾客的商品检索及发现。Coupang被《麻省理工科技评论》评选为“全球50家最智能科技公司”之一,并入选《福布斯》“30大改变世界格局者”。



有机会与曾为Google,亚马逊,Pinterest等公司工作过的世界级搜索工程师和数据科学家合作。定义和解决难题,提高搜索质量,提高转换率,以及更好地了解顾客意图。 我们渴望为顾客提供更好的搜索引擎,并帮助他们找到有用的产品。 


  1. 利用数据挖掘,机器学习,NLP和深度学习技术,分析大量的查询和产品数据,以改善检索结果和排名结果
  2. 开发和构建基础知识数据库,提高搜索质量
  3. 提供端到端产品,帮助客户找到所需产品  


  1. 计算机科学,计算机工程或相关专业的学士学位
  2. 3年以上的数据结构,基础算法和系统设计的相关工作
  3. 4年以上Java,C / C ++或Python编程经验
  4. 2年以上的信息检索/搜索/推荐系统相关的实践经验 


  1. 大数据平台和并行计算方面的经验,如Hadoop,Spark
  2. web信息采集和大数据处理经验
  3. NLP /机器学习/深度学习的经验
  4. 有能力分析、简化和解决问题
  5. 热衷于定义和开发革命性搜索引擎
  6. 良好的沟通能力和团队合作精神
  7. 计算机科学或相关工程专业的硕士或博士学位


Principal Ranking Algorithm_ Search Discoverability Team

Coupang is one of the largest and fastest growing e-commerce platforms on the planet. We are on a mission to revolutionize everyday lives for our customers, employees and partners. We solve problems no one has solved before to create a world where people ask, “How did we ever live without Coupang?” Coupang is a global company with offices in Beijing, Los Angeles, Seattle, Seoul, Shanghai, and Silicon Valley.

Job Overview

As our  Principal Ranking Engineer for Search Discoverability Team, you have the opportunity to work with world-class Search Engineers and Data Scientists who have been worked for Google, Amazon, Pinterest, etc. You will define and solve hard problems to improve search quality, increase conversion rate, as well as understand customer’s intention better. We are desired to provide customer a friction-less search engine and help customer to find useful products. Your ideas and experience would help us achieve the goal.

Key Responsibilities: 

  1. Everyday query debug to dive deep into search results and understand defects and problems, based on which design experiments to improve search quality.
  2. Develop on different java based ranking frameworks efficiently and fast iterate experiments, using statistical or machine learning methods.
  3. Collaborate with different organizations, including PO and KM, to deliver search products.


  1. Bachelor’s degree in Computer Science, Computer Engineering, or related majors
  2. 3+ years of solid work with data structures, fundamental algorithms and system design
  3. 4+ years of coding experience with Java, C/C++ or Python
  4. At least 2 years hands-on experience with Information Retrieval/Search/Recommendation Systems  

Preferred Qualifications: 

  1. Experience on big data platform and parallel computation, like Hadoop, Spark
  2. Experience on web crawling and big data processing
  3. Experience on NLP/machine learning/deep learning
  4. Ability to analyze, simplify and solve problems
  5. Passion of defining and developing a revolutionary search engine
  6. Good communication and team play
  7. Master’s or PhD degree in Computer Science or related Engineering majors 

Career Path

  • Senior Software Engineer
  • Software Engineering Manager
  • Technical Program Manager
  • Product Manager (Product Owner)
  • Tech Recruiter


Benefits and Rewards

  • Flex Time

  • Open Culture

  • Team Outings

  • Collaboration

  • International Interaction

Our mission is global

Coupang is a global business with offices in Seoul, Shanghai, Beijing, Silicon Valley, Seattle and Los Angeles.

Seoul, Korea

Our Korea office is located in downtown Seoul near Lotte World Hotel and Lotte World Mall.

Shanghai, China

Our office in Shanghai is conveniently situated near to restaurants and gyms, as well as to the Evergreen Hotel and the Chamtime Square Shopping Mall.

Beijing, China

Our Beijing office is located in One Indigo, a Grade A-listed office tower. From our space on the 12th floor, you can take in expansive views of Indigo Park, the Ba River and the Beijing skyline. We are conveniently situated a few steps away from the Indigo Shopping Mall, and parking is easily available.

Mountain View, United States

Our Mountain View office is located in the Silicon Valley area across from the NASA Ames Research and Visitor Center.

Seattle, United States

Our Seattle office can be found in the heart of downtown Seattle near restaurants and tourist attractions such as the Pike Place Market.

Los Angeles, United States

Our office in Los Angeles is located in the Riverside area right next to the Sycamore Canyon Wilderness Park.

Latest Jobs

Sign up for job alerts

Interested InSelect a job category from the list of options. Select a location from the list of options. Finally, click “Add” to create your job alert.

  • Software Development Engineers, Beijing, Beijing Municipality, ChinaRemove