LY Corporation Tech Stack

Japan's largest platform ecosystem: messaging, search, e-commerce, and advertising

Software Development Chiyoda-ku, Tokyo 10,001+ employees Founded 2023 Public Company

LY Corporation operates a large-scale, multi-service platform built on polyglot infrastructure (Java, Kotlin, Go, Scala, Rust, Python) with heavy streaming (Kafka, OpenSearch) and Kubernetes orchestration. The tech stack reflects operational maturity at billions-of-messages-per-day scale—a constraint visible in active pain points around cost optimization and high-volume delivery. The hiring mix skews heavily engineering (37 of 84 named roles), with mid-level engineers dominating; decelerating velocity and post-merger product-integration work suggest the organization is consolidating rather than expanding.

Tech Stack 156 technologies

Core StackKotlin Java Scala Go MySQL Redis Apache Kafka Kubernetes Prometheus Grafana Loki Nginx GitHub Actions Jenkins CircleCI Rust Python Istio Docker TensorFlow Excel Apache HBase OpenSearch Zipkin Pyroscope Kibana Envoy Spring Framework Drone Argo CD+123 more

AdoptingKubernetes TiDB YugabyteDB

ReplacingPerl

What LY Corporation Is Building

◆Challenges

Optimizing cost and performance
Handling billions of daily messages
Technical debt in legacy stack
Performance degradation in distributed database
Achieving high reliability
Retaining disabled employees
Reducing operation costs with ai
Scaling high-volume delivery system
Complex legal challenges from expanding corporate responsibility
Maximizing group synergy through m&a

▲Active Projects

Ml platform development
Chat feature development
Line mini app platform backend
Shopping tab launch
Line gift service
High-volume message delivery system
Lineミニアプリプラットフォームのバックエンド開発
Product integration post-merger
Llm-based new system development
Line広告 display advertising platform

Hiring Activity

Decelerating110 roles · 30 in 30d

Department

Engineering

Product

Ops

Marketing

Data

Design

Legal

Security

Seniority

Mid

Senior

Manager

Lead

Director

Intern

Junior

Staff

Notable leadership hires: Tech Lead, Technical Director, Data Director

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About LY Corporation

LY Corporation is a public company formed in October 2023 through the consolidation of LINE Corporation and Yahoo Japan Corporation. The group operates across search, portals, e-commerce, messaging, and advertising, serving millions of users in Japan and beyond. With over 10,000 employees spanning approximately 40 countries, the organization is managing integration across legacy systems and multiple product lines. Current focus includes scaling chat infrastructure, launching new shopping and advertising features, and building LLM-based services while addressing technical debt and cost pressures inherited from the merger.

HeadquartersChiyoda-ku, Tokyo

Company Size10,001+ employees

Founded2023

Hiring MarketsJapan, Romania

Frequently Asked Questions

What tech stack does LY Corporation use?

LY Corporation uses Java, Kotlin, Go, Scala, Rust, and Python for services; MySQL, Redis, HBase, and Kafka for data; Kubernetes for orchestration; and Prometheus, Grafana, Loki, Zipkin for observability. They are adopting TiDB and YugabyteDB.

What is LY Corporation working on?

Active projects include ML platform development, chat and shopping features, LINE Mini App platform backend, LLM-based systems, high-volume message delivery, and LINE advertising display. Post-merger product integration is underway.