Engineer

• Job Details
• Application and Job Summary
• Selection Information

Job Details

Software Engineer

Software Engineers participate in the design, development, and operation of LY Corporation’s services and the infrastructure systems that support them such as those for data management and ad serving. Additionally, they work to ensure the security of these services. This is an environment which will expose you to a wide range of technology stacks and provide many opportunities to grow as an engineer.

Server-side

Server-side Engineers are responsible for the development of web applications and back-end systems in addition to commonly used shared platform features, such as data management and operational environment infrastructure, that they depend on. Their work includes the development and design of features which are provided directly to users (ad delivery, authentication, video delivery etc.) as well as underlying platform components and distributed systems designed to securely handle large amounts of data with high throughput.

Front-end

Front-end Engineers are responsible for the front-end development of each of LY Corporation’s services. They build web applications that run in a variety of environments, such as traditional browsers and iOS/Android WebView. In addition to this, they participate in SDK/Framework development and do performance tuning.

Client (iOS/Android)

Client Engineers are responsible for developing client applications for the iOS and Android platforms to support a variety of LY Corporation services. In collaboration with planning, design, and other organizations, the team performs tasks such as functional development, performance tuning, build improvement, and UX (User Experience) improvement.

Data

Data Engineers are responsible for the design, development, and operation of a variety of data-related products to maximize the value of data for each service. The team pursues modern data stacks, and utilizes the latest big data technologies to achieve scalable and efficient data processing.

Security

Security Engineers work to solve security challenges that arise in large-scale and highly complex environments for a variety of service and global business environments. For example, they analyze and assess the impact of vulnerabilities, threat events, and security weaknesses. The result of that analysis is used to design, implement, and improve countermeasures which are optimized for domain tiers such as user, application, network, system, data, and device.

Infrastructure Engineer

Infrastructure Engineers build and operate the infrastructure that supports LY Corporation’s services. This is an environment which provides the opportunity to grow as an engineer by working on one of the largest infrastructure systems in Japan.

System

System Engineers automate the design, construction, and operation of an infrastructure of over 100,000 physical servers used in each of LY Corporation’s services. Mainly this position is responsible for technical verification and cost optimization related to OS provisioning and the selection of server and storage hardware for large-scale infrastructures. This position also covers system development work related to server management, operation, and monitoring.

Network

Network Engineers are responsible for the planning, design, construction, and operation of large-scale networks that support the communication of tens of thousands of servers across LY Corporation’s services. The domain of work covers network equipment such as routers, switches, and load balancers as well as internet and leased lines. This position works on network types including data center server farms, domestic and international DCI networks, high-security individual service networks, transit lines, IX and PNI. The team also validates new products and technologies and develops automation tools to improve operational efficiency and accuracy.

Database

Database Engineers are responsible for the operation and management of the RDBMS (MySQL, Oracle, PostgreSQL, SQL Server) and NoSQL (Redis, Cassandra, MongoDB, HBase) used for each service. These DBMS are provided in the form of DBaaS on the company's private cloud system. You will work as a DBA contributing an environment with over 15,000 instances of MySQL and 20,000 instances of Redis. It is one of the largest scale operational environments in Asia. In addition to operations, you will contribute to DBRE and DBaaS development mainly using Golang, Python and K8S to improve productivity. Finally, the team is also involved in original DBMS research and the development of technologies such as FractalDB and LEO Storage Engine.

Cloud Platform

Cloud Platform Engineers are responsible for the development of infrastructure provisioning and operational automation using software technologies and methodologies for cloud platforms that seamlessly connect infrastructure and applications. Specifically, they develop and operate private cloud platforms that leverage OSS, such as OpenStack and Kubernetes, as well as network control and data planes.

Corporate Internal Network

The Internal Network team is responsible for the design, construction, operation, and improvement of stable internal networks for use by LY Corporation. The work mainly covers improving internal network access methods, investigating and validating new technologies, responding to inquiries from users, investigating the causes of problems caused by equipment failure and communication failure, and replacing equipment. In this department, you will be able to contribute to LY Corporation’s business growth by using networking technology to realize stable network communication at all times.

Data Science

Positions related to Data Science are responsible for constructing and improving large scale AI and machine learning systems, analyzing data and making proposals. This work utilizes a vast amount of data from a wide variety of LY Corporation’s services.

Applications for the Data Scientist course will be closed for the 6th Round. We will announce on this page when we resume accepting applications.

Artificial Intelligence (AI)

The AI team is responsible for research and development in the technical areas of natural language processing, speech processing, and image/video processing. This team engineers solutions to user issues across a wide variety of LY Corporation’s services through writing papers, presentations and discussions at international conferences, and research and development of high-quality, general-purpose fundamental technologies.

Machine Learning

This team is involved in development focused on machine learning. They contribute to the introduction and application of new technologies and service implementation as well as maintenance operations and continuous improvement of LY Corporation’s services. Machine Learning Engineers are responsible for providing advanced data analysis and machine learning solutions for each service, including search systems such as web search and product search, content recommendation and filtering, and user targeting. Additionally, they are involved in data utilization across services and developing machine learning platforms for the entire company.

Data Scientist

Data Scientists have the mission of maximizing the value of LY Corporation’s services, and are responsible for data analysis operations. In order to support business decision making, they implement the process from issue discovery to solution application in a single step.

Privacy & Trust

This team is responsible for research, development and societal application of privacy, security and trust within the domain of data and AI utilization. Through basic research on advanced technologies such as differential privacy and secret computation and the development of applied technologies targeting services and infrastructure, the team aims to realize privacy protection, data utilization and trustworthy AI.