Senior Software Engineer, Bots + Fraud Detection (EMEA) jobs in United States
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Cloudflare · 1 month ago

Senior Software Engineer, Bots + Fraud Detection (EMEA)

positionHybrid
timeFull-time
remoteHybrid
senioritySenior Level

Cloudflare is a leading technology company focused on building a better Internet. They are seeking a Senior Software Engineer to join their Bots and Fraud Detection team, where the role involves designing and scaling distributed software solutions to combat malicious bot activities.

AnalyticsEnterprise SoftwareSecurityWeb Hosting
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H1B Sponsor Likelynote

Responsibilities

Join Cloudflare's Bot and Fraud Detection team to tackle real-world security challenges, leveraging massive threat intelligence data through data science and machine learning
Design, build, and scale high-performance distributed software for one of Cloudflare's fastest-growing security products
Work with global data exceeding 50 million HTTP requests per second, utilizing a tech stack that includes Go, Python, JavaScript, Rust, Lua, Kafka, Kubernetes, ClickHouse, PostgreSQL, and Jupyter notebook
Make a meaningful impact in detecting and mitigating abusive HTTP L7 layer traffic worldwide

Qualification

Distributed data processingGo programmingMachine learningJava programmingPython programmingWeb SecurityAlertingMonitoring systemsSystems-level debuggingStatistical inferenceAICuriosityEmpathyTackling ambiguous problemsJavaScriptClickhouseDockerSaltBot detectionFraud detection

Required

Proficiency in designing, integrating, and optimizing distributed data processing pipelines
Strong coding skills in Go, Java, Python, or other high-performance languages
Experience in constructing and managing alerting and monitoring systems for data processing pipelines
Exceptional abilities in systems-level debugging
Curiosity and empathy
Comfortable with tackling ambiguous problems and unblocking yourself

Preferred

Preferred background or interest in Web Security, HTTP protocols, and JavaScript
Familiarity with advanced analytics encompassing machine learning, statistical inference, and AI
Knowledge and experience with columnar database like Clickhouse
Experience productionalizing ML models
Experience with cluster and configuration management systems such as Docker, Salt
Strong web security fundamentals
Previous experience in bot and fraud detection

Company

Cloudflare

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Cloudflare is a web performance and security company that provides online services to protect and accelerate websites online.
dateFounded in 2009
location
San Francisco, California, USA
people-size1001-5000 employees
web-link
http://www.cloudflare.com

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 Company
Total Funding
$2.08B
Key Investors
Franklin TempletonFidelityUnion Square Ventures
2025-06-13Post Ipo Debt· $1.75B
2019-09-12IPO
2019-03-12Series E· $150M

Leadership Team

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Matthew Prince
CEO & Co-Founder
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Lee Holloway
Co-Founder & Lead Engineer
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Recent News

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Company data provided by crunchbase