Member of the Technical Staff, Interpretability

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Output has built a biological reasoning model that understands biology at the scale and complexity life actually operates. Our model independently learned the principles of molecular interactions, opening up drug treatments that were previously impossible. We're already generating therapies that traditional approaches cannot reach. The hardest problems in both AI and biology are being solved here, and there is room for you to own one. Output is currently in stealth, operated by a team of repeat founders and biotech veterans with multiple exits in AI x Bio, and backed by top-tier VCs including Y Combinator. You will continue developing methods to understand what our foundation model learns about biology, and build the tools that make it a glass box model. We believe that in biology, a model's reasoning must be visible. And the features you find are not just explanations: they expand what the model can do. You will continue developing our methods for probing and reverse-engineering the model's learned representations, understanding how it encodes biological information across molecular scales You will design and run experiments to identify and characterize capabilities, mapping what the model has learned about molecular interactions and biological function You will build methods to extract the model's biological understanding as explicit, usable outputs that downstream systems and researchers can act on You will create tools that connect model internals to meaningful biological concepts, making the model's reasoning interpretable to scientists and useful in practice You will work closely with the pretraining and generation teams, feeding interpretability findings back into model development to strengthen the capabilities you uncover You will own the full pipeline from probing experiments to production-quality interpretability tools, building robust systems on distributed infrastructure About You You have a PhD in computer science, machine learning, physics, mathematics, or a related field with 2+ years of post-doctoral or industry research experience, or a Bachelor's or Master's degree with 5+ years of hands-on research and engineering experience in model interpretability or representation analysis You have a strong publication record at top-tier venues (e.g., NeurIPS, ICML, ICLR) with contributions to mechanistic interpretability, representation analysis, probing methods, or model understanding You have hands-on experience analyzing the internal representations of large neural networks, with demonstrated ability to design experiments that reveal what models have learned You are proficient in Python and PyTorch, and have experience working with large models on GPU infrastructure You have demonstrated the ability to take interpretability research from experiments to usable tools: you do not just analyze models, you build systems others can use You write production-quality code that is well-tested and maintainable, and you are comfortable working in shared codebases with version control and code review You think carefully about what constitutes evidence that a model has learned a concept, and you design experiments that distinguish real capabilities from artifacts Bonus Points You have a background in chemistry, biology, computational biology, biophysics, or a related natural science You have experience interpreting ML models trained on scientific or biological data You have experience building visualization or analysis tools for model internals You have experience with multimodal models or representations that span multiple data types You have contributed to open-source machine learning projects Our Values ❤️ Heart: We foster a culture of ownership. We are assembling a team of individuals who are passionate and take pride in their contributions. 🏆 Excellence: We have an unwavering commitment to excellence and continuously challenge ourselves to reach the highest standards. 🚀 Practicality: We value practicality and results-oriented thinking. We are committed to making a tangible impact on the lives of patients and the broader community. 📣 Honesty: We place a high value on honesty and directness. We firmly believe in addressing issues as they arise, in an open and transparent manner. 🎮 Fun: We believe that life is too short to not have fun. Our goal is to create a workplace that is fun, engaging, rewarding and fulfilling.

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