Qualifications
Responsibilities
Lead the development of Hark's frontend surfaces, including web and mobile web applications, and the component systems that support them.
Deliver user interfaces for real-time, streaming agent interactions, managing partial responses, tool invocations mid-stream, and asynchronous state updates.
Collaborate with designers to translate visionary concepts into interfaces that are fast, responsive, and reliable, paying close attention to detail.
Create accessible and high-performance components that scale across Hark's product surfaces.
Implement performance tracking for your contributions, monitor for regressions, and iterate based on actual user data.
Partner with platform engineers to define the APIs and data contracts that connect the frontend to the agent runtime.
Requirements
Proven expertise in frontend development, with proficiency in modern React (or equivalent), state management patterns, and capabilities to build fluid interfaces that operate seamlessly at 60 frames per second.
Experience in developing real-time user interfaces, with a strong understanding of streaming data, websockets, and optimistic updates, where latency and state consistency are critical.
A meticulous eye for detail, with an ability to identify and correct issues in animations, loading states, and overall interface feel.
Demonstrated experience in creating accessible and scalable components.
About the job
About Hark
Hark is at the forefront of artificial intelligence, pioneering the creation of advanced, personalized intelligence systems. Our goal is to develop proactive, multimodal AI capable of interacting seamlessly with the world through speech, text, vision, and persistent memory.
We are revolutionizing the AI landscape by integrating this intelligence with next-generation hardware, establishing a universal interface that bridges the gap between humans and machines. While traditional AI systems primarily rely on chat boxes and outdated devices, Hark is leading the charge towards agentic systems that naturally engage with people and their environments.
Our mission is to build multimodal models alongside cutting-edge AI hardware, designed from the ground up to serve as a cohesive interface for a new era of intelligent systems.
About the Team
As a Frontend Engineer at Hark, you will take charge of crafting the frontend experience that users interact with daily. This involves developing user interfaces that maintain real-time engagement with a streaming AI agent, ensuring that interactions feel instantaneous and that state remains coherent across voice, text, and visual inputs. Your work will instill confidence in users, enhancing their trust in our technology.
This role offers high ownership within a small, dynamic team. You will collaborate closely with designers and engineers to shape the agent platform, making your contributions instrumental in defining the overall user experience with Hark.
About Hark
Hark is an innovative artificial intelligence company dedicated to building advanced and personalized intelligence systems that redefine human-computer interaction. We aim to create cutting-edge AI that engages naturally with users through multiple modalities, including speech and vision, coupled with next-generation hardware.