Senior Backend Engineer

Responsibilities

• Own deliveries and features from start to finish
• Design, build, and own backend services in a microservices-based, event-driven architecture
• Implement core domain logic that drives key product workflows and system behavior
• Ingest and process high-volume usage and event data from customer-facing endpoints
• Build backend services that support operational, analytics, and reporting use cases
• Model, persist, and manage domain data, enabling querying, filtering, and lifecycle management
• Expose well-designed APIs and webhooks consumed by customers, UIs, and external systems

Requirements

• 3–5+ years of professional software engineering experience building backend services and distributed systems
• Expertise in the Java ecosystem (Java, Spring Boot, Maven/Gradle)
• Strong understanding of event-driven architectures, asynchronous processing patterns, and messaging systems
• Proven experience designing and maintaining RESTful APIs, webhooks, and service-to-service integrations
• Experience operating in cloud environments (AWS, GCP, or Azure)
• Familiarity with authentication and identity technologies such as OAuth, OIDC, SAML, or SCIM

Preferred Qualifications

• Experience building products in cybersecurity, identity, governance, or enterprise SaaS
• Ability to balance scalability, reliability, and speed of execution in a fast-paced startup environment
• Proficiency in using AI tools to enhance engineering workflows and productivity

Benefits

• Competitive salary (£89K – £105K) and meaningful equity
• Generous PTO and pension plan
• Flexible hybrid work model
• Annual global off-sites
• High-trust, low-bureaucracy engineering culture

About the Company

Harmonic Security provides an AI Governance and Control (AIGC) platform that helps enterprises safely adopt AI. By understanding user intent and data context in real time, Harmonic gives security teams visibility and control across every tool and workflow. We are a fast-growing company named to the Rising in Cyber 2026 list and are backed by investors including N47, Ten Eleven Ventures, and In-Q-Tel.