Greenhouse ·
full-timeSenior Systems Engineer - Application Security
Cloudflare · Hybrid
Cloudflare operates a global network designed to improve the performance and security of internet properties. As a Senior Systems Engineer focusing on Application Security, you will contribute to the development and maintenance of core security products, including WAF, Page Shield, and API Shield. The role involves designing systems, writing high-quality code in Go or Rust, and managing distributed services that operate at an immense scale. You will be responsible for reviewing technical specifications and RFCs, while ensuring that deployed services remain performant and secure. Day-to-day tasks include working with custom components and modern infrastructure tools like Kubernetes and Kafka to solve complex, large-scale engineering challenges. This position is well-suited for experienced software developers with at least five years of professional background in distributed systems. Successful candidates will possess strong Linux fundamentals and a pragmatic approach to engineering. While prior experience in cyber security is considered an asset, it is not strictly required. The role demands an ability to work collaboratively in a hybrid environment, requiring two days of in-office attendance at one of the specified European locations.
Education
- Level: Bachelor's degree
Key Skills
Notes
['Hybrid role (2 days in office)', '5+ years professional experience required']
Experience required
5-5 years experienceAbout the Role Cloudflare is seeking a Senior Systems Engineer for Application Security to design, build, and operate security products at internet scale. Responsibilities Design systems and write code following industry best practices; review RFCs and technical specifications; deploy and maintain live services handling up to 100M requests per second. Requirements At least 5 years of hands‑on software development experience; proficiency in Go or Rust; experience with devops tools such as Kubernetes, Salt, Kafka, or Systemd; strong Linux/Unix fundamentals; experience with distributed systems; cyber‑security knowledge is a plus.
Skills for this role
Required skills
Also mentioned in the listing
| Role | Senior Systems Engineer - Application Security |
|---|---|
| Company | Cloudflare |
| Location | Hybrid |
| Compensation | Not disclosed |
| Posted | 2026-09-30 |
| Deadline | Rolling |
Typical process for this type of role
A general guide — the exact steps for this specific listing may vary; check the original posting for details.
- 1ApplicationSubmit your resume through the apply link.
- 2ScreeningRecruiter reviews your background against the role.
- 3AssessmentA technical test, assignment, or coding round, depending on the role.
- 4Interview(s)One or more rounds with the hiring team.
- 5OfferOffer letter with compensation and start date.
Before you apply
0/4Senior Systems Engineer - Application Security at Cloudflare: frequently asked questions
- Who can apply for the Senior Systems Engineer - Application Security role at Cloudflare?
- The listing asks for Bachelor's degree; 5-5 years of experience.
- What skills does the Senior Systems Engineer - Application Security role require?
- The listing highlights Go, Rust, Kubernetes, Salt, Kafka, Systemd, Linux, Unix, Distributed Systems, Cyber Security. Show each of these in a project or past role on your resume.
- What is the salary for this role?
- Cloudflare has not stated compensation in the listing. Check the original posting or ask during the application process.
- Is the Senior Systems Engineer - Application Security position remote, hybrid or onsite?
- The listing marks this role as hybrid, with Hybrid as the location.
- What is the application deadline?
- Cloudflare has not listed a fixed deadline, so apply early in case the opening is filled.
- How do I apply for the Senior Systems Engineer - Application Security role?
- Use the Apply button on this page. It opens the original listing on boards.greenhouse.io, where you submit your application with the company.
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