Senior Back-end Security Engineer - Java / Kotlin / Golang Overview: We're working with a fast-growing Cloud Security Client on the hunt for an experienced Senior Backend Engineer to join their world-class engineering team. This is a rare opportunity to shape the architecture and scalability of a runtime-powered Cloud-Native Application Protection Platform used by global enterprise customers. As part of a highly skilled, collaborative team, you'll work on complex backend challenges using modern Java/Kotlin in a fully cloud-native environment with exposure to cutting-edge tools and real-world security impact. Key Responsibilities: * Own the full lifecycle of backend services, from design and development through to deployment, monitoring, and optimisation * Contribute to architectural direction and technical decision-making across microservices * Conduct peer design and code reviews as part of a high-trust, high-performing team * Collaborate with DevOps, frontend, and product teams to deliver scalable and secure features * Continuously improve system performance, reliability, and efficiency in production at scale Essential Skills & Experience: * Experience building high-performance backend systems using Java, Kotlin, or Golang * Strong understanding of cloud platforms (AWS, GCP, or Azure) and modern deployment workflows * Experience working with data-intensive systems - including databases, messaging queues, and event-driven services * Proven ability to deliver production-grade services in a microservices-based architecture * Comfortable working in CI/CD pipelines and containerised environments (e.g. Docker, Kubernetes) * Collaborative mindset and a strong sense of ownership and initiative Desirable Skills: * Exposure to systems like Neo4j, ElasticSearch, TimescaleDB, RabbitMQ, Redis * Experience working on security-focused platforms or distributed cloud infrastructure * Familiarity with observability and monitoring tools at scale Why Apply? * Play a key role in one of the most exciting and fast-growing companies in cloud security * Tackle complex engineering challenges with a talented global team * Work with modern tech in a truly cloud-first, high-impact environment * Competitive salary, flexibility, and the opportunity to shape product and platform direction from an early stage What's in it for you? Salary up to £120k 35 days holiday Private pension & health care For more information about this opportunity, connect with Neill Ferguson on LinkedIn or submit your CV via the link below.