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Senior Software Engineer (LINE API

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Senior Software Engineer (LINE API in Remote

  • Japan

Responsibilities

  • Design, build, and optimize LINE messaging services and applications on AWS.
  • Build new product features and internal tools for global clients.
  • Translate stakeholder and business requirements into robust technical specifications.
  • Understand and integrate with the existing advertising platform architecture.
  • Enhance ecosystem components for improved performance and scalability.
  • Collaborate proactively with engineering teams in Japan and the United States.

Requirements

  • Bachelor's degree in Computer Science or a related field, or equivalent practical experience.
  • 8+ years of professional software development experience.
  • Deep hands-on experience with the LINE Messaging API and LIFF.
  • Proven experience building and launching LINE MINI Apps, including LINE SDKs and LINE Login/authentication flows.
  • Strong programming proficiency with Java, JavaScript, and TypeScript.
  • Experience designing APIs and running containerized Docker applications on AWS or GCP in Linux environments.
  • Knowledge of object-oriented design, concurrency, distributed systems, algorithms, and data structures.
  • Hands-on experience with relational databases such as MySQL or Oracle and/or large-scale data stores such as BigQuery.
  • Business-level spoken and written Japanese and English.
  • Experience with other LINE APIs is preferred.
  • Strong technical analysis, problem-solving, communication, and end-to-end ownership skills.

Benefits

  • Primarily remote, work-from-home arrangement in Japan with occasional in-office meetings or team gatherings.
  • Required overlapping hours from 6:00 AM JST Tuesday through Friday; Mondays follow standard local working hours.
  • Flexible-hybrid practices may include occasional on-site work sessions, team-building events, or other in-person activities with advance notice.
  • Collaborative, inclusive, and globally distributed work environment.

Yahoo

Yahoo builds consumer internet products—Mail, Finance, Sports, News, and Search—and an omnichannel advertising platform used by brands and publishers. It monetizes through ads and subscriptions while operating high-scale services that handle billions of daily requests for hundreds of millions of ...

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