Application Security Engineer (Remote: US based - Senior and above)
Full-time
US
Oct 22, 2026
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About the Role
At Doyensec (), we believe that quality is the natural product of passion and care. We love what we do and we routinely take on difficult engineering challenges to help our customers build with security. Our clients are some of the leading global brands in the tech and startup communities. We help them secure their software and systems by providing information security consulting services (pentesting, reverse engineering, product security design and auditing). We keep a small dedicated client base and expect to develop long-term working relationships with the projects and people with whom we work. We are looking for a highly experienced security engineer to join our consulting team. We perform gray-box security testing on complex web and mobile applications. We need someone who has proven testing skills across multiple languages and environments and can hit the ground running. If you are good at crawling around in the ventilation ducts of the world’s most popular and important applications, you probably have the right skill set for the job. Experience developing code and tools is highly desirable, along with the ability to support the growth of fellow engineers. We offer a competitive salary in a supportive and dynamic environment that rewards hard work and talent. We are dedicated to providing research-driven application security and therefore invest 25% of your time exclusively to research, where we build security testing tools, discover new attack techniques, and develop c