Principal Front End Engineer

Harmonic Security lets teams adopt AI tools safely by protecting sensitive data in real time with minimal effort. It gives enterprises full control and stops leaks so that their teams can innovate confidently.

We are led by cybersecurity experts and backed by top investors including N47, Ten Eleven Ventures, and In-Q-Tel. 

We’ve gained early traction and product-market fit with a world-class team, and we’re now focused on laying the foundation for a truly iconic global brand. This is your opportunity to join us early and shape not just a brand, but a category.

Our Product Delivery team is the engine that turns vision into impact. We ship early and often, getting valuable features into the hands of customers quickly and iterating from there. We work in the open by default, sharing progress and ideas, and we trust each other to own outcomes. We’re a small but mighty crew where every person plays a critical role and we’re committed to using AI to work smarter and faster

We’re looking for a Front End Engineer to help shape the future of Harmonic’s product experience. You’ll be one of our earliest UI engineers, working closely with product, design, and backend teammates to turn complex security problems into simple, elegant, and fast user experiences. This isn’t just a coding role - you’ll own outcomes, influence architecture, and set the tone for how we build and scale our front end.

• Design and build front-end systems that make security effortless for users
• Collaborate with product, UX, and ML teams to create elegant solutions to complex problems
• Shape our front-end stack and establish best practices for scale, performance, and security
• Own features end-to-end - from design reviews to deployment - with real customer impact
• Ship fast, learn fast; continuously delivering value and refining based on user feedback

• Our product feels intuitive, performant, and delightful to use
• Features you’ve built are widely adopted and make security workflows seamless
• Our front-end stack is modern, clean, and scalable, enabling rapid growth
• Security, performance, and accessibility are baked into every release
• You’re seen as a trusted partner by product, design, and engineering peers

• Strong experience with React, TypeScript, JavaScript, HTML, and CSS
• Skilled in component-based architecture, state management, and responsive design
• A track record of building performant, secure, user-facing applications
• Comfortable with modern tooling (Git, CI/CD, testing frameworks)
• A product-driven mindset; you love making complex workflows intuitive
• Excellent collaboration and communication skills in cross-functional teams

• Love solving complex UI/UX challenges with simplicity and speed
• Care deeply about design and user experience, not just functionality
• Thrive in fast-paced startup environments where ambiguity is the norm
• Enjoy shaping culture and engineering practices, not just writing code
• See AI as a tool to help you build smarter, faster, and better

This isn’t just a job; it’s an opportunity to be part of a team that is redefining cybersecurity. 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.

• Competitive pay and meaningful equity with a direct stake in Harmonic’s success
• Comprehensive benefits, pension plan, generous PTO, and flexible hybrid work
• A small, passionate team that values transparency, creativity, and learning
• Thoughtful leadership that cares deeply about growth, impact, and people
• Annual global offsites (past trips include Lisbon and Nashville)
• The chance to directly shape both our product and our culture as we build a category-defining company