Introduction for Engineer_English

This is an introduction to LY Corporation's engineers.
It introduces the characteristics of the development organization, the technology stack, the culture and the system (updated in July 2025).

If you are interested in our engineering or working at our company, please also visit the following sites.

■ Information on technology
LY Corp Official website "Technology & Design":https://www.lycorp.co.jp/en/technology-design/
LY Corp Tech Blog: https://techblog.lycorp.co.jp/en

■ Recruitment information
Mid-career recruitment (engineers): https://www.lycorp.co.jp/en/recruit/career/job-categories/#j-0
New graduate recruitment (engineers): https://www.lycorp.co.jp/en/recruit/newgrads/engineer/

Transcript

1. 2025.6
2. Our mission is to “Create an Amazing Life Platform That Brings WOW! to Our Users.” “WOW” and “!” represent inspiring experiences based on “Users Rule,” which is one of our company’s values. As engineers, we focus on the user's perspective, leveraging new technologies and ideas to offer services that are convenient, enjoyable, and beneficial. Specifically, we strive to enhance personalization through machine learning and generative AI, develop innovative interfaces, and create new services using AI and big data as key drivers of change. The fusion of our skill and creativity allows us to deliver new value to users. By utilizing the diverse systems and data platforms at LY Corporation, we are empowered to tackle technical challenges that can directly impact users worldwide and leverage the scale that is unique to large platforms. Blend your creativity with the systems and data infrastructure and experience the moment they make a global impact. It is the skill and creativity of engineers that drive the delivery of WOW! to users. Let's walk this path together and enjoy the changes our technology brings to the world.
3. Technology Values The engineers of LY Corporation uphold the following three values to achieve the company’s mission. Stay Trustworthy Embody Professionalism Enjoy the Challenge Together Let's respect our diverse colleagues and strive for mutual improvement through open and constructive communication. By enhancing your own and your team's technical skills, aim to significantly exceed the expectations of users and that of both internal and external engineers. Actively take on technically challenging tasks and work towards achieving them while enjoying the process with your colleagues.
4. 01 02 03 04 05
7. The following two organizations coexist: In-house companies that make decisions within their business domains, and organizations that focus on cross-sectional product development and development support. 01 Search Commerce Local/UGC Media Entertainment Corporate Business In-House Companies Non In-House Companies • • • • • • LINE Home Service Infrastructure Technology Management Data Generative AI Finance Corporate IT Security ID Membership Service LINE Dev etc. - Excerpt of organizations where engineers are primarily assigned (as of April 2025)
9. 02 Back-end ・Java, Kotlin/Spring Boot ・Golang, Python Infrastructure ・Database : Cassandra, HBase, MySQL, Oracle, PostgreSQL ・Messaging : Kafka, Pulsar ・Middleware : Envoy, Istio, NGINX ・Infrastructure : Private Cloud (Openstack, Kubernetes) ・Container : Docker, Harbor, Kubernetes ・Monitoring : Prometheus, Splunk ・Security : Athenz ・Source Code Management : GitHub Enterprise ・Configuration Management : Ansible ・CI/CD : ArgoCD, CircleCI, Drone, Jenkins, Screwdriver.cd ・Testing : MagicPod Front-end ・TypeScript/Vue, React Native Apps ・Kotlin, Swift
11. 03 Tech Media Tech Media is a media outlet within the LY Corporation Technical Portal, our official tech intranet that consolidates essential information for LY Corporation engineers. Available information include company-wide technical strategies, tech exchanges both within/outside the company and across divisions, as well as interview articles with engineers across the LY Corporation Group (hereinafter the “Group”). Knowledge Sharing New technologies adopted with high priority by LY Corporation are listed and visualized. For example, we have launched an information-sharing portal on generative AI. Additionally, we provide an environment that encourages mutual information sharing among employees, featuring pages like "myTips," where employees can easily post their knowledge. Image Image
12. Tech Blog https://techblog.lycorp.co.jp/en 03 Tech Blog shares technical case studies, knowledge, and the Group’s development culture that underpin the services of LY Corporation and Group companies. The company’s editorial team provides writing support and advice to enable all employees involved in development to write and publish their knowledge. Tech Introduction Our corporate website introduces the company’s tech organizations. The website also features a message from the CTO, an overview of our technology values, and other related topics. It also provides links to our Tech Blog and sponsored events. https://www.lycorp.co.jp/en/technology -design/ Content Delivery X (@lycorptechjp_e) Speaker Deck (lycorptech_jp) LY Corporation's technical initiatives and culture are shared through social media such as X and Speaker Deck
14. 04 Tech-Verse This tech conference showcases the appeal of LY Corporation’s Product Group for engineers, designers, and project managers. At Tech-Verse 2025, we have hosted tracks across 12 different topics over two days, sharing past challenges and experiences. Participants also had the opportunity to directly interact with developers. Hack Day At this event, participants develop their projects freely over a total of 24 hours (12 hours per day × two days) and make a 90-second pitch. Afterwards, they can get to experience each team's work at an exhibition. Global mixed teams also participate, making it a perfect opportunity to unleash creativity, strengthen bonds with team members, and enjoy meeting new colleagues.
15. Internal Study Sessions 04 We regularly hold internal study sessions for LY Corporation engineers at offices across Japan. These sessions serve as opportunities for interaction across different departments and teams. Tech All-Hands Meeting This is a meeting where the CTO and technical executives share technology strategies with all engineers within the company. Information on development policies, organizational structures, and project progress are also shared, aiming to ensure that internal engineers can work efficiently and decisively.
16. 04 ISUCON* ISUCON is a competition where teams compete to achieve the highest score in performance tuning of web applications. Hosted by LY Corporation, it has been 14 years since the first event was held in 2010. ISUCON is Japan's largest performance tuning event, attracting aspiring student engineers and professional engineers alike. *Abbreviation for Iikanji ni Supīdo Appu Kontesuto (positive vibe speed-up contest) Hack U As a development support activity for students, we collaborate with educational institutions to organize hackathons and workshops. External Study Sessions We regularly hold external study sessions for engineers at our offices across Japan. Not only do these sessions help spread information on technology, they also contribute to increasing motivation and enhancing the value of our company's engineers.
17. Sponsored Activities 04 Community Support We sponsor conferences and events across various technological domains. At sessions and booths, we engage in communication with attendees by introducing LY Corporation's technology and development. In addition to contributing to pull requests for open-source projects, we actively release and maintain our own open-source assets, provide financial support to open-source initiatives, and submit RFCs. Release of TypeScript Remove Gold sponsor of Vue.js
19. 05 imaｇe Doctoral Studies Support Program This is a system designed to support employees who aim to obtain a doctoral degree while working. At LY Corporation, you can experience practical research and theoretical academic studies related to big data, which is one of the company's strengths. Note: Only permanent employees with at least two years of service are eligible. Those who qualify through the selection process receive a scholarship for their science doctoral studies (up to 1 million yen/six months) and one day of special paid leave per week. Support for Participation in Conferences Requiring Travel If you wish to attend a tech conference that involves travel, your organization may, at its discretion, allow attendance during working hours and cover the participation costs. Note: The decision to provide support is made on a case- by-case basis, taking into account various factors such as the budget set by each organization, the content of the conference, and participant information. Please note that participation is not guaranteed.
20. 05 Tech Training Portal Tech E-learning Tech Language Support • • • •