Data Engineer

Available locations: Lisbon or London

About Cloudflare and Our Team:

Cloudflare's Engineering Team is home to some of the industry's top engineers, dedicated to building and scaling innovative software that handles a significant portion of Internet traffic. Our team, specifically responsible for Turnstile and Challenge Pages, collaborates closely with a dedicated Product Manager and other engineering teams to develop cutting-edge bot detection and mitigation solutions. Our focus is on enhancing internet security while preserving user privacy and usability. Check out some of our articles mentioning Turnstile!

What You'll Do:

As a Data Engineer on our team, you'll play a key role in expanding our Turnstile and Challenge products. Your responsibilities will include:

• Advanced Bot Detection: Develop sophisticated bot and human detection capabilities using machine learning and traffic analysis techniques, with a strong emphasis on privacy and security.
• Full-Stack Development: Engage in full-stack development—from backend systems and distributed frameworks to client-side logic—to build comprehensive solutions.
• Scalable and Secure Software: Build scalable, secure, and privacy-conscious software to accommodate a growing and diverse user base.
• Cross-Functional Collaboration: Work closely with cross-functional teams to innovate and enhance our security solutions.
• Research and Development: Contribute to research efforts, potentially publishing findings in security and privacy conferences.

About You:

We're looking for a motivated individual with:

• Strong Background in Machine Learning and Security: Expertise in machine learning, distributed systems, and security, particularly in traffic analysis.
• Data Analysis Experience: Familiarity with data analysis frameworks like Spark and machine learning libraries such as Scikit-learn and PyTorch.
• Security-Focused Mindset: Essential for developing products like Turnstile that prioritize user privacy and security.
• Experience with Privacy Technologies: Knowledge of privacy-enhancing technologies and countermeasures.
• Curiosity and Drive: A natural sense of curiosity and a self-driven attitude to continuously learn and solve complex problems.
• Excellent Communication Skills: Strong problem-solving abilities and the capacity to communicate effectively within a team.

Bonus Points:

• Cloud and DevOps Tools: Experience with cloud platforms like GCP or AWS, Docker, Git, and distributed systems tools such as Terraform and Ansible.
• Database Knowledge: Familiarity with PostgreSQL and ClickHouse.
• Counter-Abuse Experience: Previous work in counter-abuse, fraud detection, and mitigation.
• Research Contributions: Publications or contributions to security and privacy research are highly regarded.

Working in Our Team:

You'll be integral to making our products more robust, secure, and stable. Our solutions run across the web on various browsers, requiring continuous testing and adaptability. We value innovation and problem-solving skills—we encourage you to identify challenges and propose effective solutions. Our team meetings focus on addressing these challenges, with an emphasis on delivering both short-term and long-term value to the business.