業務内容

• Write and maintain Ruby on Rails code powering GitLab CI pipelines (scheduling, orchestration, execution, reporting).
• Improve reliability, performance, and scalability of the CI domain; optimize DB access and background processing for high throughput.
• Design and ship features like merge trains, pipeline schedules, review apps, and browser testing to accelerate secure delivery.
• Troubleshoot complex production issues in a large monolith; drive architectural changes for zero-downtime deployments.
• Collaborate with product, frontend, QA, and Verify teams; mentor engineers and contribute to the roadmap; document usage guides.

技術スタック

必須スキル

• Extensive experience building, running, and debugging backend services in high-traffic production environments.
• Advanced Ruby on Rails proficiency for reliable services in a large monolith.
• Deep PostgreSQL expertise: schema design, tuning, large-scale data handling.
• Strong background in asynchronous job processing and performance improvements.
• Observability practices (metrics, logging, tracing) and secure deployment patterns.
• Documentation and design proposals; cross-functional collaboration in large codebases.

歓迎スキル（該当する場合）

• GraphQL API design/implementation.
• Performance engineering for CI pipelines.
• Experience with zero-downtime deployment patterns.

キャリア成長観点

• Influence core GitLab CI at scale: architecture decisions, roadmap, and mentorship across a globally distributed team.
• Deepen expertise in Rails monoliths, high-throughput backends, and DB optimization, while collaborating with product, infra, and QA.
• AI-enabled workflows and continuous improvement of reliability, SLOs, and deployment practices within a mature, remote-friendly culture.