Senior Software Engineer, Cloudflare for SaaS

Job Summary

Cloudflare for SaaS lets SaaS providers offer their services on domains branded for each customer, rather than on the provider's own domain. The product powers customer domains and automates the complex work behind onboarding domains, validating ownership, issuing and renewing certificates, and safely deploying configuration across Cloudflare's global network.

Responsibilities

• Design, build, and operate reliable backend services and APIs for managing customer domains and their configuration.
• Evolve the control plane to support tens of millions of customer domains without sacrificing correctness, availability, or API performance.
• Improve certificate and domain lifecycle workflows, including onboarding, validation, renewal, migration, and safe deletion.
• Model ownership and shared state carefully so changes remain consistent across distributed services and configuration stores.
• Build useful observability, alerts, and operational procedures, and participate in debugging and incident response.
• Collaborate across engineering and product teams, document designs and tradeoffs, and review the work of fellow engineers.

Requirements

• 3+ years of professional experience building backend systems at a technology company.
• Experience writing production-quality code in Go or another language, with a willingness to learn Go.
• Experience designing, building, and operating distributed systems or high-scale services.
• Strong debugging and troubleshooting skills across applications, data stores, and production environments.
• Proficiency with modern Unix/Linux development and runtime environments.
• A track record of delivering well-tested, reliable code and taking ownership of it in production.
• Clear written and verbal communication, including the ability to explain technical decisions and tradeoffs.

Nice to Have

• Experience designing and evolving RESTful APIs used by external customers.
• Working knowledge of SQL and relational databases such as PostgreSQL, including schema and query design.
• Understanding of distributed-systems concerns such as consistency, caching, concurrency, and failure recovery.
• Experience modernizing legacy systems or migrating workflows to a service-oriented architecture.
• Experience with observability tools and practices, including metrics, logs, tracing, alerting, and SLOs.
• Familiarity with PKI/TLS, certificate lifecycle management, ACME, DNS, or domain validation.
• Experience with message queues, Kubernetes, or globally distributed configuration systems.
• Interest in building intuitive product experiences for customers managing large fleets of domains.