Senior Full-Stack Engineer (Kotlin + React) — NXJ-142 We are looking for a Senior Full-Stack Engineer (Kotlin + React) to join a team building a cybersecurity product.In this role, you will take ownership of full-stack development, contribute to architectural decisions, and support the growth of the engineering team. This is a good fit for someone who is comfortable working in a startup environment, takes initiative, and enjoys solving complex technical challenges.ResponsibilitiesDesign, build, and maintain full-stack applications using Kotlin (backend) and React (frontend)Work with Docker and containerization as part of deployment and DevOps tasksContribute to architectural decisions as the product evolves and scalesMentor junior and mid-level engineers and support team growthParticipate in on-call rotations and handle critical security issues when they ariseRequirements5+ years of professional software development experienceStrong experience in Kotlin backend developmentStrong experience in React frontend developmentHands-on experience with Docker and containerized environmentsAgile mindset with the ability to work across both backend and frontend, adapting to changing prioritiesEnglish — Upper-Intermediate (B2) or higherWill be a plusExperience in cybersecurity or a strong interest in the domainExperience with WebSockets or real-time systemsBroader DevOps experience beyond basic Docker usageExperience working in small, fast-paced startup teamsWhat we offerCompetitive salary and benefits packageMedical insuranceTop equipment kitFull RemoteCollaborative and innovative work environmentCareer growth and development opportunitiesA chance to work with a talented and driven team of professionalAbout the projectYou will join an Israel-based cybersecurity product company operating in a startup-style environment, building a platform focused on improving security processes and helping organizations better protect their systems.The product is already live and used by paying customers. The team is small (under 10 people), with fast decision-making and high ownership.The company is currently expanding its engineering team to scale the product and deliver new features, including exploration of AI-adjacent directions.