Senior Engineer - Software Engineering in London

AI is being run everywhere, by humans and agents. Harmonic Security governs all of it. The AI Governance and Control (AIGC) platform understands user / agent intent and data context in real time, giving security teams visibility and control across every tool and workflow so companies can move faster with AI while minimizing risk. We operate in one of the fastest-moving spaces in tech: the emerging intersection of AI and cybersecurity. It's a market still being defined, and we're among the first to build natively for it - protecting sensitive data in real time, at the endpoint, with minimal friction for the teams using it. We're led by deep cybersecurity expertise and backed by investors who know the space: As AI adoption inside the enterprise accelerates, the ability to safely observe, control, and enforce policy in real time isn't a nice-to-have. How We Work: AI-First by Design Harmonic exists to help enterprises adopt AI safely and at scale. Everyone here actively leverages AI tools to perform their best work — from deep research and writing to building robust processes and automating complex workflows. We expect every new hire to bring a genuine curiosity for AI and a commitment to using it to work smarter, faster, and with greater creativity. for others, it means architecting entirely new systems with AI at the core. Customer Engineering is a brand-new function at Harmonic, and you'll be one of the first people to build it. This is a deliberate philosophy, not just a new team name: we're treating customer experience as an engineering problem. Every repeated question or manual fix is a signal that something should be automated, instrumented, or resolved at the root, not answered by hand. That means real backend work - fixing bugs, shipping small customer-driven improvements, and building automation and tooling that reduces how much of this has to be done by hand at all. We're looking for a Backend Engineer to sit inside Customer Engineering rather than the product roadmap team. You'll be the technical backbone for how we support and delight customers day-to-day: triaging and fixing bugs, resolving smallish customer requests, spotting opportunities to get ahead of a problem or surprise a customer with something they didn't ask for, and - critically - building tools and automation that let customers (and the team around you) get answers without needing an engineer in the loop every time. You'll work across our core applications, identity providers, and data security platforms, and you'll bring the same engineering rigor to this function as you would to product work - just pointed at a different problem. Dig into microservices, event-driven pipelines, and integrations with identity providers and data security platforms to find and resolve root causes, not just symptoms Instrument and monitor the systems customers depend on so recurring issues get surfaced and fixed before they pile up - and so you can spot chances to reach out or ship something before a customer even raises it Track how much of the customer experience is still manual, and systematically drive that down through automation and fixes Help define what "good" looks like for this function - process, tooling, and metrics - since you're building it from scratch 5+ years of professional software engineering experience building backend services and distributed systems in the Java ecosystem (Java, Spring Boot, Maven) ~ Proven experience designing and maintaining RESTful APIs, web hooks, and service-to-service integrations ~ Comfortable operating in AWS, GCP, or Azure environments and working with modern observability tooling, logging, and monitoring platforms ~ Comfortable moving between hands-on debugging, small feature delivery, and building internal tooling in the same week Have experience building products in cybersecurity, identity, governance, compliance, data protection, or enterprise SaaS environments Love the idea of blending software development, distributed systems and data-intensive applications Enjoy shaping culture and engineering practices, not just writing code - especially for a function that doesn't exist yet Leverage AI tools as an engineer to help you build smarter, faster and better This isn't just a job - it's a chance to help define a category. We're building at the intersection of AI and security, carving out an emerging market where the rules haven't been written yet, and the people who join now will write them. We believe today's talent is tomorrow's success, and we're committed to creating an environment where you can do the best work of your life. Rare market opportunity - Join early in a category-defining company at the convergence of AI and security, where your work directly shapes how enterprises tackle one of the biggest unsolved problems in tech Competitive pay and meaningful equity - A real stake in Harmonic's success, not a token gesture Comprehensive benefits - 401K, pension plan, generous PTO, and flexible hybrid work We collaborate openly, share feedback honestly, and help everyone produce their best work