Joblaze summary

In this role, the Systems Reliability Engineer at Cloudflare focuses on architecting, deploying, and maintaining distributed systems that ensure high availability and low latency across global server fleets. Key skills include proficiency in systems programming languages and a deep understanding of Linux internals, alongside experience with automation and configuration management tools. This position is well-suited for engineers with a background in large-scale systems and a methodical approach to troubleshooting. The team emphasizes collaboration across various functions to enhance the reliability and performance of Cloudflare's infrastructure.

Joblaze insights

Listed yesterday — first seen on Joblaze October 29, 2026. Last confirmed on Cloudflare's careers page October 29, 2026.

Quick facts

Is the Systems Reliability Engineer - Core role remote?: It's hybrid — Cloudflare expects some on-site time in London, United Kingdom.
Where is the role based?: Cloudflare is hiring for this position in London, United Kingdom.
What's the tech stack?: Joblaze extracted these technologies from the posting: Artificial Intelligence, Ceph, Consul, Kafka, Kubernetes, PostgreSQL.
What seniority level is this role?: Cloudflare targets mid-level candidates for this position.
Is this full-time or contract?: Full-time for this Systems Reliability Engineer - Core role at Cloudflare.

From the original posting

About Us

Hiring Locations: Lisbon, Portugal, London, UK

About the Role

We are looking for a Systems Engineer to architect, scale, and operate the distributed infrastructure that powers our global server fleets. You will drive automation and reliability work that keeps our systems fast and resilient at scale.

Responsibilities

Cloudflare is a system spanning the globe, on a mission to make the internet better, safer, and more powerful everyday. With this goal in mind, our product teams are responsible for deployed thousands of deployments at an ever increasing rate.

As an engineer on one of our Core platform teams, you'll be building the tools to help engineers deploy and operate the services that make Cloudflare work. Our mission is to provide a reliable, yet flexible, platform to help product teams release new software efficiently and safely. You’ll be building the private cloud that Cloudflare developers leverage to build Cloudflare itself. Core platforms we operate at Cloudflare include:
- Kubernetes
- Postgres, PgBouncer, and Stolon
- Kafka
- Zookeeper
- Ceph & Rook
- Developer tools, CI, and CD systems
- Vault
- Consul
- Etcd
- Temporal
- Artificial Intelligence & LLMs

You will

Architect, deploy, and maintain robust distributed systems, focusing on high availability, low latency, and horizontal scalability.
Optimise Performance: Analyse system bottlenecks, optimise kernel and network stacks, and fine-tune resource utilisation across global server fleets.
Drive Automation: Build and maintain internal tools and automation frameworks to streamline infrastructure deployment, configuration management, and monitoring.
Ensure Reliability: Participate in architecture reviews, capacity planning, and proactive system health monitoring to guarantee maximum uptime and resilience.
Collaborate Cross-Functionally: Partner closely with Security, Network Engineering, and Product teams to integrate infrastructure solutions smoothly across the entire stack.

Desirable Skills, Knowledge, and Experience

Demonstrable professional experience building and managing large-scale distributed systems or Linux production environments.
Proficiency in at least one systems programming or scripting language (e.g., Go, Rust, C/C++, Python) with a track record of writing clean, maintainable code.
Deep understanding of Linux/Unix operating system internals (e.g., storage subsystems, memory management) and core networking protocols (TCP/IP, DNS, BGP).
Experience with configuration management and infrastructure-as-code tools (e.g., Ansible, Terraform, SaltStack).
Strong analytical and troubleshooting skills, with a methodical approach to diagnosing complex system-level failures.

Bonus Points

Experience managing containerised workloads at scale using Kubernetes, Docker, or similar orchestration platforms.
Familiarity with CI/CD pipelines and automated testing strategies for infrastructure.
Contributions to open-source systems software projects or active participation in the broader systems engineering community.
Experience with any of our existing tooling, such as Kafka and Temporal
Good experience of harnessing AI to drive robust solutions

What Makes Cloudflare Special?

Standard company text repeated across Cloudflare's postings is omitted here.

Systems Reliability Engineer - Core