Senior Systems Engineer

Cloudflare MCP Server Portals give organizations a secure, centralized way to connect AI agents to internal and third-party tools. As a Senior Systems Engineer on the MCP Portals team, you will lead the design, delivery, and operation of distributed systems that authenticate users, manage OAuth credentials and sessions, enforce Zero Trust policies, and proxy MCP traffic across Cloudflare's global network.

• Lead the design, implementation, and operation of globally distributed services that connect MCP clients to authorized upstream MCP servers.
• Own complex features and service improvements from problem definition through production support.
• Shape technical decisions for MCP Portals, including service boundaries, security controls, and tradeoffs.
• Evolve implementation as the MCP specification changes, planning safe migrations.
• Design and review authentication and authorization flows involving Cloudflare Access, OAuth, identity, and credential handling.
• Improve reliability and scalability of multi-tenant systems on the Cloudflare Developer Platform.
• Strengthen observability through logs, metrics, traces, and dashboards; participate in incident response.
• Lead investigations of complex customer issues and drive fixes.
• Review designs and code, mentor engineers, and raise quality practices.
• Partner with product, security, and engineering teams to turn customer needs into product capabilities.

• 6+ years of experience building and operating distributed systems, backend services, network services, or infrastructure products in production.
• Demonstrated ownership of complex production services or projects.
• Strong programming skills in TypeScript, JavaScript, Go, Rust, C++, or another production language.
• Deep understanding of HTTP, APIs, proxies, streaming connections, and distributed-systems failure modes.
• Experience with authentication and authorization technologies such as OAuth 2.0, OpenID Connect, JWTs, PKCE, or policy-based access control.
• Experience designing or operating security-sensitive systems.
• Ability to diagnose production issues using logs, metrics, traces, and customer evidence.
• Experience making backward-compatible changes to live systems.
• Clear communication skills and ability to mentor engineers.

• Experience with the Model Context Protocol.
• Familiarity with the Cloudflare Developer Platform or other serverless edge-computing platforms.
• Experience building gateways, forward proxies, identity systems, developer platforms, or Zero Trust and data loss prevention products.

For Portugal based hires: Estimated annual salary of €66,000-91,000. This role is eligible to participate in Cloudflare’s equity plan.

Applicants should provide a resume or CV describing relevant engineering, technical leadership, and operational experience. Apply via the provided Greenhouse link.