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Backend Development Engineer

楽天モバイル株式会社

テック 東京都 企業サイト 掲載 9/5

給与

記載なし※ 募集要項に金額の記載がありません

勤務地
東京都
雇用形態
記載なし
働き方
記載なし
年間休日
記載なし

要約求人票をもとにAIがまとめたものです

Develop and optimize backend microservices and APIs supporting global, multi-channel CPaaS communication services. The role covers distributed systems, databases, Kubernetes operations, CI/CD, observability, and collaboration with product and engineering teams.

応募資格

必須

  • 5+ years of hands-on backend development experience.
  • Strong proficiency in Java or Golang.
  • Expertise with Postgres and MySQL.
  • Hands-on experience with Kubernetes and containerization.
  • Experience with CI/CD pipelines (GitHub Actions preferred).
  • Experience with Microservices and API-first system design.
  • AI-Assisted Development: Proficient in leveraging LLM-based tools for coding, automation, and workflow acceleration.
  • Advanced English proficiency (strong communication, documentation, and collaboration skills).

歓迎

  • Domain experience with communication protocols (SMPP, SIP, REST APIs, WebRTC).
  • Experience across multiple CPaaS domains (SMS, Email, Voice, Passkey, Auth Services, WhatsApp, LINE, RCS, etc.).

求める人物像

  • Proven ability to work effectively in fast-moving, high-autonomy environments.

使用ツール

ClaudeCodexGrafanaPrometheus

募集要項最終確認 9/25

職種
バックエンドエンジニア
雇用形態
記載なし
給与
記載なし
勤務地
Tokyo, Japan
働き方
記載なし
経験年数
5年以上
掲載日
2026/09/05 13:10(24日前)
最終確認
2026/09/25 20:07(4日前)

仕事内容

About Organization

We are building the next generation of our CPaaS platform, a robust ecosystem powering multi-channel communication services.

Our platform supports global traffic across SMS, Email, Voice, WhatsApp, LINE, RCS, Passkey, and advanced Authentication services.

We are looking for a highly skilled Backend Engineer to drive the scalability, reliability, and evolution of these services within a high-autonomy, fast-paced R&D environment.

Job Duties

Design, implement, and optimize microservices powering multi-channel communication workloads.

Build and enhance backend capabilities supporting messaging, identity, verification, and communication APIs.

Develop high-throughput, low-latency services for global CPaaS traffic.

Design schemas, optimize queries, and ensure peak performance across databases.

Deploy and operate services on Kubernetes, ensuring resilience, scalability, and cost-efficiency.

Build clean, scalable REST APIs and contribute to API-first product architecture.

Manage version-controlled pipelines for build validation, automated testing, and safe deployments.

Utilize LLM-based tools (e.g., Claude, Codex) to improve code quality, automate documentation, and accelerate development workflows.

Ensure system visibility using Grafana, Prometheus, and structured logging.

Partner with Product Managers, QA, DevOps/SRE, and UI/UX teams to deliver high-quality features.

Uphold coding standards, conduct code reviews, and drive continuous improvement of engineering practices.

Key Interfaces

Backend Engineering Team

QA & Automation Teams

DevOps / SRE

Product Managers

UI/UX Designers

Project Managers

R&D Leadership / CTO

Languages

English (Overall - 3 - Advanced)

この求人は楽天モバイル株式会社の採用ページの掲載内容をもとに構成しています。応募条件の最新情報は募集元をご確認ください。

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