Founding Full-Stack Engineer

About the Role Join a pre-seed Applied AI startup in San Francisco as a Founding Full-Stack Engineer, working directly alongside the founders to ship across the entire product. This is a high-ownership, high-impact role at a small team building at the intersection of generative AI, creative intelligence, and social media — with ambitions to reach hundreds of millions of users. You'll touch everything: web, mobile, backend, infrastructure, AI integrations, and video processing pipelines. If you thrive in fast-moving, founder-led environments and want your work to matter from day one, this role is for you. What You'll Do Build across the full product surface: web app (Next.js), mobile app (React Native), admin tools, pricing flows, and dashboards. Ship real features fast — multi-agent orchestration, FFmpeg video stitching, Remotion pipelines, and LLM/VLM integrations. Architect systems designed to scale to one million users per day. Collaborate directly with founders on product decisions, UX flows, and technical direction. Dive into whatever moves the product forward — UI, backend, infra, orchestration, computer vision, ML, or DevOps. Own problems end-to-end without waiting for permission or detailed instructions. What We're Looking For Required (dealbreakers): Strong proficiency with Next.js and React Native for building web and mobile interfaces. Hands-on, end-to-end full-stack experience across UI, backend, and infrastructure. Strongly preferred: Experience integrating and deploying AI systems, including large language models (LLMs) and vision language models (VLMs). Practical experience with video processing and media pipelines using FFmpeg and Remotion. 1–3 years of relevant experience in a fast-paced, multi-disciplinary environment. Ownership mindset — you ship fast, communicate clearly, and flag issues early rather than going quiet. Experience building consumer-facing applications at high user volumes. Compensation & Benefits Salary: Up to $300,000 USD annually (commensurate with experience). Early-stage equity in a pre-seed company with strong investor backing. Visa sponsorship: Not available. Location On-site in San Francisco, CA, United States. This is an in-person role; remote work is not available.