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About the Job Title: Senior JavaScript Security Researcher Position: Full-time | 40 hours per week  Location: Amsterdam, Netherlands | Work From home (2-3 days per week in the office)  Salary Range: 80.000,- to 100.000,- annually  At ThreatFabric, we help the world's leading banks stay ahead of fraudsters, scammers, and cybercriminals. Our technology protects millions of users every day by detecting fraud, malware, and emerging attack techniques before damage is done. As a Senior JavaScript Security Researcher, you'll explore new browser capabilities, uncover detection methods, and turn cutting-edge research into real-world protection used at global scale. Your discoveries won't remain on a whiteboard, they'll directly help safeguard people and businesses around the world As a senior JavaScript Security Researcher, you’ll be responsible for maintaining our FRS web SDKs. Next to that you’ll be driving the new (detection) capabilities of our SDK. This includes detecting and investigating fraud patterns & trends. You’ll be working closely with Threat Analysts and Product teams to enhance fraud detection. Part of your job is exploring and experimenting with (new and upcoming) browser APIs, and research how these APIs can be used to create new and novel detections mechanism. This requires a creative and out-of-the-box mindset. Proven experience with browser and JavaScript security research is a plus.  The position  You should have the ability to research, develop, manage, test, and deploy browser-based JavaScript code in the following areas:  Latest browser fingerprinting tactics Ability to research the underlying working of browser APIs Ability to come up with novel to use these APIs for detection; this includes looking for anomalies, side channels, and other side effects of these APIs Creating a production ready web SDK Your daily work is to collaborate with the behaviour and device risk analytics tech team including backend engineers, data scientists and product managers.  You are expected to be able to work with minimal guidance as lead research and JavaScript engineer.   Since you will be working in a startup environment, passion and motivation are key to success and pleasure at work.  Responsibilities  Your key responsibilities will include:  Maintaining our FRS web SDKs Driving the new (detection) capabilities of our SDK Detecting and investigating fraud patterns & trends Working closely with Threat Analysts and Product teams to enhance fraud detection Exploring and experimenting with (new and upcoming) browser APIs Researching how these APIs can be used to create new and novel detections mechanism What We Offer A 12-month employment contract with the intention to extend. Subject to mutual satisfaction, this may lead to a permanent position. A competitive salary that reflects your skills and experience with a salary range  between:80 . 000,-  to 10 0.000,-  annually. 25 Holidays per year 8% holiday allowance (included in annual salary). A Pension Scheme. A stimulating and supportive work environment that encourages growth and development. The opportunity to make a meaningful impact in a rapidly growing tech company. Flexible Remote / Hybrid work from home options to promote work-life balance. Flexible working hours. Active ThreatFabric  events and  FitFabric  bootcamps.  Active knowledge sharing huddles. Skills and qualifications  8+ years relevant experience in JavaScript and or framework development.  Familiar with Browser APIs including APIs needed for browser, mouse, keystroke, scroll dynamics.  Able to work with Open Source development workflow using git.  Excellent debugging and problem-solving skills.  Knowledge of Docker is a nice to-have. Proficient English writing skills to document work and communicate project status. Be a team player and fee