Middle JavaScript Developer (Cybersecurity Platform)

We are seeking a JavaScript Developer for our product focused on mitigating malicious ads in digital advertising.Our core tool is a script designed to detect and block harmful or unauthorized ads. This script is deployed on publisher websites to identify malicious ads and is also integrated into certain ads served by SSPs to publishers.Sounds interesting? Join us!CustomerOur client is a Brooklyn-based company founded in 2012. Starting from humble beginnings, the company developed the Defense Platform, the cornerstone of all our products, which protects enterprises from advanced bot attacks, fraud, and account misuse. Today, we authenticate more than 20 trillion interactions every week for large companies and leading online platforms, verifying their authenticity.ResponsibilitiesSupport the Script: Address and fix issues as they arise on publisher sitesDevelop Functional Tests: Write functional tests using SeleniumImprove Script: Enhance and refine the script to improve performance and effectivenessInvestigative Tasks: Perform various investigative tasks to address and resolve issuesRequirements3+ years working with pure JavaScript/TypeScriptGood knowledge of OOPKnowledge of what the iFrame element isKnowledge of different browser APIsKnowledge of CS fundamentals, algorithms, and data structuresBasic understanding of HTTP and WebSocket protocolsExperience building CI/CD pipelines on GitHub and/or GitLab and/or BitbucketUpper-Intermediate or higher level of EnglishWould be a plusExperience with obfuscation and deobfuscation1+ years of experience with any web driver-based technology (selenium, puppeteer, etc.)Good understanding of code transformation tools and/or bundlersBulletproof coding skills in terms of “can”/”cannot”, not “should”/”should not”