Senior Backend Engineer (Ruby and/or Go), Tenant Scale; Cells Infrastructure

GitLab is the intelligent orchestration platform for DevSecOps, trusted by more than 50 million registered users and over 50% of the Fortune 100. The company focuses on increasing developer productivity, improving operational efficiency, reducing security and compliance risk, and accelerating digital transformation.

• Experience building observable, resilient production services using Go or Ruby on Rails (TypeScript experience is a plus).
• Background delivering and operating production systems in high-scale environments, including incident response and operational ownership.
• Ability to reason about distributed systems, including consistency models, partitioning strategies, failure modes, and operational tradeoffs.
• Experience building high-throughput networking services (knowledge of gRPC and protocol buffers is a plus).
• Familiarity working in large, multi-team codebases and coordinating changes across teams and services, including making features and data models Cell-aware.
• Knowledge of observability practices such as metrics, tracing, and alerting, with a focus on building systems suitable for on-call operation.
• Strong written communication skills for an async-first, globally distributed team, including documenting decisions and runbooks.
• Experience working with relational databases in production, including schema design, migrations, and query performance tuning (PostgreSQL experience is a plus).

• Design and implement edge traffic routing that directs requests to the correct Cell transparently to users.
• Build and evolve the Topology Service as the authoritative source of cluster state for routing, resource assignment, and Cell lifecycle decisions.
• Collaborate across the GitLab Rails monolith and supporting services to make features and data models Cell-aware with feature teams.
• Operate and improve routing and topology systems by participating in tier-2 on-call, responding to escalated incidents, and enhancing observability and operational tooling.
• Author Architecture Decision Records (ADRs), operational runbooks, and documentation for adoption and extension of the Cells platform.
• Review merge requests from team members and community contributors, maintaining high standards for correctness, performance, and security.

• Benefits to support health, finances, and well-being.
• Flexible Paid Time Off.
• Team Member Resource Groups.
• Equity Compensation & Employee Stock Purchase Plan.
• Growth and Development Fund.
• Parental leave.
• Home office support.

GitLab hires new team members globally with all roles remote; some roles may have specific location-based eligibility requirements. GitLab is an equal opportunity workplace and affirmative action employer, with policies based solely on merit regardless of protected characteristics. Accommodation requests can be made during the recruiting process.