Founding ML Engineer - NLP, LLM, RLHF

Ready to own the complete ML stack while reshaping how Generative AI transforms advertising? Join this start-up as Founding ML Engineer building a Generative AI based advertising platform. You'll contribute to a sophisticated solution that leverages consumer interaction data and generative models to create personalized ads across multiple modalities - from language to image and video generation. Despite being only 5 people strong, they're already generating revenue and have secured seed funding from prestigious investors including a16z. Now they're ready to scale and tackle even more complex challenges with their AI-based system. In this role, you'll be solving complex technical challenges such as implementing RLHF to enhance system intelligence, advanced prompting and fine-tuning of LLMs, and improving user efficiency. You'll have significant autonomy, owning the entire pipeline and keeping up to date with the state of the art to maintain top-level performance. The role combines research, development, and experimentation, with approximately 20-30% focused on research, 40% on building and training models, and 30-40% on experimentation, performance improvement and deployments. While primarily focused on language/text, the team works across multiple modalities, so an interest in multimodal applications would be valuable. Requirements: 2 years industry experience Strong expertise in NLP and LLMs (prompting and fine-tuning) Experience with RLHF implementations Solid foundations in Deep Learning Proven track record in building production ML systems Experience with recommendation systems or ad tech would be beneficial but isn't essential. Your package includes a base salary of up to $225k (negotiable based on experience), plus a 10% bonus, competitive equity, healthcare benefits, unlimited holiday and more. Total compensation will be adjusted relative to your level of experience. The role is based on-site in San Francisco, with visa sponsorship available for exceptional candidates. The interview process is straightforward: Initial call with recruiter (30 mins) Conversation with Founder (30 mins) Technical assessment or on-site interview Team meeting (can be combined with stage 3) If you're excited about applying cutting-edge AI to transform the $600B advertising industry, we'd love to hear from you. All applicants will receive a response.