Application Security Engineer
Qualys - La Défense (92)

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You will be part of a team producing network security intelligence and countermeasures for the benefit of Qualys customers and the Internet community at large. If you worked here last week, you might have: written and tested several WAF rules, researched a web application to create a tailored security profile, and identified potential performance and accuracy improvements in existing security detection logic. Please note that this is a full-time position in Madison, WI in the United States.

Responsibilities:
Keep up-to-date with the application security landscape

Track new vulnerabilities, creating security logic to accurately detect and prevent attacks

Research known security issues in web applications, frameworks, and other relevant web stack components (such as web and database servers)

Build sets of generic and application specific inspection logic

Monitor inspection systems for performance and accuracy

Research and test methods to increase performance and detection accuracy

Qualifications:
BSc in Computer Science, or a similar degree

Ability to work independently and efficiently, getting things done

Good communicator, with fluent English and excellent verbal and writing skills.

A deep understanding of how the Internet works is essential. You must be familiar with networking protocols—for example DNS, TCP/IP, SSL/TLS, and others

In-depth knowledge of HTTP and the related standards and specifications

Up-to-date knowledge (sufficient to perform source code assessments and understand the security issues) of HTML, JavaScript, Flash, and other client-side technologies

Reasonable programming skills, especially when it comes to scripting and automation - you should be able to write small programs to automate your activities

Preferred Skills:
Penetration testing experiance

WAF/IDS signature design and maintenance

Lua language

C/C++

HTTP proxies

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