Senior Security Rules Engineer

Cloudflare; Greater London; On-site; GBP 90,000 - 150,000; Full time

Benefits offered by this job

Equity plan

Flexible paid time off

Job summary

Cloudflare in London is seeking a Senior Systems Engineer to join the Security Rules team. You will work on microservices written primarily in Rust and Go, shaping architecture and reliability at Cloudflare’s scale.

You will lead complex projects, mentor peers, and own design from concept to production while operating in a fast, secure environment with Docker, Kubernetes, PostgreSQL, Redis and Kafka.

Qualifications

• 6+ years of relevant professional experience with a technology company.
• Strong programming skills in Rust, Go, C++, or a similar systems-level language.
• Demonstrated ability to lead complex technical projects from ambiguity through delivery.
• Experience building and operating distributed systems.

Responsibilities

• Design, implement, and maintain the software systems that comprise Cloudflare’s Application Security Product Offering such as Rate Limiting, Web Application Firewall and more
• Lead technical design and execution for complex projects, helping define architecture, milestones, and delivery plans.
• Collaborate with internal teams, including security, network engineering, SRE, and product management, to design scalable solutions to difficult technical problems.
• Help raise the technical bar for the team by identifying systemic improvements, reducing operational toil, and influencing long‑term engineering direction.
• Review work from your peers throughout all stages of the development lifecycle to ensure high‑quality, maintainable code.
• Mentor engineers across the team by sharing technical context, providing thoughtful code and design feedback, and helping others grow in scope and ownership.
• Work with a wide range of technologies and programming languages, including Rust, Go, as well as various databases (SQL and No‑SQL), Docker, and Kubernetes.

Skills

Rust

Go

C++

Distributed systems

Tools

Docker

Kubernetes

PostgreSQL

Redis

Kafka

Job description

Cloudflare in London is seeking a Senior Systems Engineer to join the Security Rules team. You will work on microservices written primarily in Rust and Go, shaping architecture and reliability at Cloudflare’s scale.

You will lead complex projects, mentor peers, and own design from concept to production while operating in a fast, secure environment with Docker, Kubernetes, PostgreSQL, Redis and Kafka.