Senior Software Engineer

Overview

Harmonic Security Inc is hiring a Senior Software Engineer to join the Intercept team in London, England. This role operates on a hybrid work model within the cybersecurity sector, focusing on the intersection of artificial intelligence and security. The position involves working on the Endpoint Agent, Browser Extension, and the backend services that support them.

Requirements

Candidates must have five or more years of professional software engineering experience, primarily focused on building backend services and distributed systems within the Java ecosystem, including Java, Spring Boot, and Maven or Gradle. Applicants need some experience in a systems programming setting such as Rust, C++, or native software running on user devices, along with a solid grasp of systems programming concepts like memory safety, concurrency, error handling, and inter-process communication.

Additional qualifications include a strong understanding of event-driven architectures, asynchronous processing patterns, messaging systems, and distributed system design. Candidates should have proven experience designing and maintaining APIs and service-to-service integrations, comfort operating in cloud environments such as AWS, GCP, or Azure, and familiarity with modern observability tooling, logging, and monitoring platforms. A willingness to learn Rust and TypeScript is required.

What You Do

As a full-system contributor, the Senior Software Engineer owns deliveries and features from start to finish across backend services, the Endpoint Agent, and the Browser Extension. Responsibilities include designing, building, and owning Java backend services in a microservices-based, event-driven architecture, as well as ingesting and processing high-volume event data originating from agents and extensions on customer devices.

The role exposes well-designed APIs for the Endpoint Agent, Browser Extension, user interfaces, and external systems. The engineer contributes significantly to the Endpoint Agent in Rust across Windows, macOS, and Linux, and to the Browser Extension in TypeScript across Chromium, Firefox, and Safari. Additional duties involve building robust tests, validation tooling, and deployment mechanisms, investigating and resolving platform-specific issues, and collaborating with security engineers and product stakeholders to shape technical requirements.