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Senior Core Engineer Seraphic Security. Location Information: Tel Aviv-Yafo, Tel Aviv District, IL. . Description. . The browser has become the main productivity tool for employees due to driving trends like working remotely, BYOD, and web-based SaaS applications. . At Seraphic, we are revolutionizing browser security. Our patent-pending technology offers unmatched protection against zero-day attacks, phishing, and malicious downloads. By operating at the core of the browser, we provide comprehensive visibility and control, preventing data loss and leakage. . Why Seraphic?. . Cutting-Edge Protection. : Full defense against all browser threats. . Seamless Access. : Browse internal sites and private applications directly from your browser without a VPN or a remote desktop . Innovative Environment. : Be part of a team leading the cybersecurity frontier shaping the modern solutions impacting billions of users. . Challenging Technologies. : Engage with a rich SaaS app, high-scale backend processing millions of requests, and a core networking solution, all with the highest level of security . Innovation and Leadership. : Leverage our patented technology and leadership recognition, such as Frost & Sullivan's 2024 Enabling Technology Leadership Award for Global Zero Trust Browser Security . Collaboration and Team. : Work with industry experts in a collaborative environment to solve complex problems . This is an exciting opportunity to join a fast-growing start-up company, consisting of talented team players, with the best-of-breed solution revolutionizing browser security. . Join us in shaping the future of secure browsing! . What you'll do:. . Conduct in-depth research on vulnerabilities and cutting-edge exploitation techniques . Design, develop, and maintain high-scale backend systems using . Node.js. . Playing a key role in architectural and design decisions, building toward an efficient distributed architecture. . Design, develop, and optimize core components using Native JavaScript and advanced frameworks . Work extensively with the V8 JavaScript engine, customizing and enhancing its performance . Develop and implement sophisticated exploit strategies to address complex cybersecurity challenges . Explore innovative solutions for integrating security features into the core product . Design and implement high-availability applications leveraging networking technologies . Research and develop advanced methodologies for vulnerability discovery and exploitation . Participate in architectural decisions to shape the evolution of the product . Conduct research and develop proof of concepts (POCs) for new methodologies and technologies . Solve challenging issues related to the performance and scalability of core systems . Implement and optimize networking-based solutions, including advanced . proxy communication. capabilities . Develop secure and efficient backend services that handle encryption and complex agent-to-client communication . Work across . cloud. (AWS, GCP, Azure) and . on-premises. environments to deliver scalable and secure solutions . Collaborate with cross-functional teams to build high-availability applications using . networking technologies. . Write well-designed, testable, efficient code . . Requirements. . . What you’ll bring with you:. . 5+ years. of development experience, preferably with Cyber Security products . Strong expertise in JavaScript, particularly with . Native JavaScript. development. . Hands-on experience with the . V8 JavaScript engine. , including an understanding of its internals . Proven ability to conduct . vulnerability research. and develop exploitation techniques . Knowledge of security concepts, . encryption. , and secure communication practices . Experience in designing and implementing high-availability applications based on . networking technologies. . Proven ability to solve complex problems related to low-level programming and system internals . Strong research skills, with a passion for exploring a technical boundary . Self-motivated, detail-oriented, and capable of working independently . Proven experience in building backend micro-services using modern technologies (. Node.js/Python/Rust. ), preferably in high-scale . Understanding of . networking concepts. , including high-availability applications and communication protocols . Hands-on experience with . proxy development. and integrating backend systems with client-side agents . Familiarity with . encryption mechanisms. and secure communication practices in cybersecurity . Experience with cloud platforms (AWS, GCP, Azure) and on-premises infrastructure . Experience with . Elasticsearch. , proffered . ELK. . Experience with microservices architecture . Working with Message Queues such as . RabbitMQ. and . Kafka. . Working with backend frameworks such as . NestJS. . Experience in real-time system development for ingesting large amounts of data . Ability to Understand System Architecture . Highly motivated and self-learner. Strong interpersonal and organizational skills . B.Sc. Computer Science/Engineering or equivalent knowledge . Nice to have but not a must:. . Background in . cybersecurity. or experience with . EDR. systems . A start-up working experience, preferably in early stages . Experience with C++ . Experience with developing self-contained and containerized applications using . Kubernetes. . Browser extension. development experience . Electron framework. development experience . .