Senior Software Engineer (LINE API / LIFF App)
Core
Design, build, and optimize LINE messaging services and applications on AWS to generate revenue for global clients entering the Japanese market.
Role type
Senior Software Engineer (LINE API / LIFF)
Builds
LINE messaging workflows, MINI Apps, and internal tools for ad management
Domain
Advertising technology, Japanese market expansion
Deliverable
production ML models | product features
Required skills
LINE Messaging API, LIFF, LINE SDKs, LINE Login/authentication, Java, JavaScript, TypeScript, REST API design, Docker, AWS/GCP, Linux, object-oriented design, concurrency, distributed systems, relational databases (MySQL/Oracle), large-scale data stores (BigQuery)
Preferred skills
Other LINE APIs
Responsibilities
Design and build LINE messaging services and applications on AWS using AI coding agents; build new product features and internal tools; partner with stakeholders to translate business requirements into technical specs; integrate with existing ad platform architecture; enhance core ecosystem components for performance and scalability
Seniority
Senior, hands-on IC
