Staff Software Engineer, Backend

**Location** ------------ Los Angeles or San Francisco **Employment Type** ------------------- Full time **Department** -------------- Engineering **About Cantina:** Cantina Labs is a social AI company, developing a suite of advanced real\-time models that push the boundaries of expression, personality, and realism. We bring characters to life, transforming how people tell stories, connect, and create. We build and power ecosystems. Cantina, our flagship social AI platform, is just the beginning. If you're excited about the potential AI has to shape human creativity and social interactions, join us in building the future! **About the Role:** As part of the Backend Engineering team, you'll design, build, and scale systems and services that revolutionize how users engage with our cutting\-edge AI\-powered platform. This role is ideal for a self\-sufficient senior software engineer who thrives in fast\-paced environments and is passionate about driving user acquisition, engagement, and retention. Your work will have a direct impact on core business outcomes, including customer acquisition, retention, and product scalability. **What you’ll do:** * Collaborate closely with cross\-functional teams, including product managers, designers, and data specialists, to deliver high\-quality, performant, and maintainable features. * Build and enhance AI\-powered systems supporting user acquisition, onboarding, and engagement. * Experiment with and implement new technologies to optimize user journeys and streamline customer experiences. * Gain exposure to the architecture and operations behind one of the fastest\-growing social AI products globally. * Contribute your expertise to help evolve team processes and technical infrastructure, ensuring scalability and reliability. **What you’ll bring:** * Bachelor's or Master's degree in Computer Science, Engineering, or a related field. * 5–10 years of professional software engineering experience, with exp