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# Senior Java Engineer

- **Company:** Harmonic, Inc.
- **Location:** London, United Kingdom
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Microsoft Windows, Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Apple Mac Systems, Microsoft Azure, C++ (Programming Language), Cyber Security, Linux, Distributed Systems, Firefox, Gradle, Apache Maven, Enterprise Messaging Systems, Software Engineering, System Programming, Systems Integration, TypeScript, Datadog, Data Logging, Concurrency, Spring-boot, Backend, Event Driven Architecture, Build Management, Microservices
- **Published:** November 11, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=f23de250af79165d

## About the Role

Java is the foundation. You don't need expert-knowledge of Rust or TypeScript yet, but you must be willing and able to learn them and comfortable working across all three. You'll join a fast-moving team that ships often and cares about correctness, observability and maintainability., * 5+ years of professional software engineering experience, mostly building backend services and distributed systems in the Java ecosystem (Java, Spring Boot, Maven/Gradle)

 * Some experience in a systems programming setting, such as Rust, C++, or native software running on user devices
 * A solid grasp of systems programming concepts: memory safety, concurrency, error handling and IPC
 * Experience with Rust or TypeScript is a bonus. You must be willing and able to learn whichever you don't know
 * Strong understanding of event-driven architectures, asynchronous processing patterns, messaging systems, and distributed system design
 * Proven experience designing and maintaining APIs and service-to-service integrations
 * Comfortable operating in AWS, GCP, or Azure environments and working with modern observability tooling, logging, and monitoring platforms
 * A track record of delivering performant, reliable and scalable applications
 * Excellent collaboration and communication skills in cross-functional teams, * Learn quickly and independently, and are happy with a wide variety of work
 * Understand how the whole system fits together, from backend services to the code running on a user's device, and why architectural decisions matter
 * Know when to move fast and when to slow down, and make careful decisions in security-critical code
 * Test and validate rigorously, and care about building bulletproof software that runs reliably around the clock
 * Have led a technical initiative, or want to grow into leading one
 * Have worked with OS platform APIs on Windows, macOS or Linux, or built browser extensions
 * Have experience building products in cybersecurity, identity, data protection, or enterprise SaaS environments
 * Thrive in fast-paced startup environments where ambiguity is the norm
 * Leverage AI tools as an engineer to help you build smarter, faster and better

## Description

We're looking for a Senior Java Engineer to join our Intercept team, which builds the Endpoint Agent and Browser Extension that run on our customers' devices, and the backend services behind them. You'll be a full-system contributor. You'll design and build complex Java backend services and make significant contributions to the agent's Rust codebase and the extension's TypeScript codebase. This software has to be fast, resilient and trustworthy across operating systems and real-world conditions., * Own deliveries and features from start to finish, across backend services, the Endpoint Agent and the Browser Extension

 * Design, build, and own Java backend services in a microservices-based, event-driven architecture
 * Ingest and process high-volume event data from the agents and extensions running on customer devices
 * Expose well-designed APIs used by the Endpoint Agent, Browser Extension, UIs, and external systems
 * Make significant contributions to the Endpoint Agent in Rust across Windows, macOS and Linux, and to the Browser Extension in TypeScript across Chromium, Firefox and Safari
 * Build robust tests, validation tooling and deployment mechanisms for releases that customers rely on every day
 * Investigate and resolve platform-specific issues with precision and speed
 * Work closely with security engineers, other engineers, and product stakeholders to shape technical requirements