Cloudflare · 1 month ago
Software Engineer, Application Performance
Hybrid
Full-time
Hybrid
Mid, Senior Level
4+ years expCloudflare is on a mission to help build a better Internet by protecting and accelerating any Internet application online. The Software Engineer role focuses on improving web and software application performance, working closely with various engineering teams to enhance the performance of Internet properties.
AnalyticsEnterprise SoftwareSecurityWeb Hosting
Responsibilities
Work on the code that runs close to the end user at Internet scale
Build and quickly iterate on high-growth products
Scale our expanding network
Build tools to improve availability, performance, uptime, and response times
Make systems fault-tolerant and elastic
Qualification
Required
First and foremost curiosity and critical thinking
Experience (and love for) debugging complex distributed systems
Experience with a continuous integration workflow and using source control (we use git)
Experience with build and maintain distributed systems
Understanding of what it takes to build secure systems
Ability to work in multiple systems level programming languages - bonus points for Go and/or Rust
Experience with monitoring, alerting and debugging high volume production systems
Preferred
Minimum 4 years professional experience as a developer/engineer
Solid grasp of how TCP/QUIC and HTTP work
Experience with Linux networking
Understanding systems at the network protocol level, including the differences between what the specs say, and what actually happens on the Internet
Strong systems level programming skills
Experience with databases similar to PostgreSQL and Clickhouse
Good Unix knowledge, having submitted patches to Operating Systems a huge plus for some roles
Fluent in analyses of large data sets
BA/BS or higher in Computer Science/Engineering or equivalent professional experience
Company
Cloudflare
Cloudflare is a web performance and security company that provides online services to protect and accelerate websites online.
1001-5000 employees
H1B Sponsorship
Cloudflare has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (117)
2024 (115)
2023 (66)
2022 (98)
2021 (83)
2020 (37)
Funding
Current Stage
Public CompanyTotal Funding
$2.08BKey Investors
Franklin TempletonFidelityUnion Square Ventures
2025-06-13Post Ipo Debt· $1.75B
2019-09-12IPO
2019-03-12Series E· $150M
Leadership Team
Matthew Prince
CEO & Co-Founder
Lee Holloway
Co-Founder & Lead Engineer
Recent News
2026-01-11
2026-01-11
Company data provided by crunchbase