AI Researcher: Multimodal Understanding

The Company Mirror Physics is a New York-based AI company working on a new frontier in scientific simulation. We design intelligent systems that understand physics from first principles, providing critical acceleration for advanced technological R&D. Today, we’re building the world’s most capable AI platform for predicting experimental outcomes in chemistry and materials science, tightly coupled with reality via high-throughput experimental verification, to accelerate discovery in biotech, energy, manufacturing, and other domains. Backed by leading investors and scientific experts, we are expanding our research team at a pivotal moment in the field. The Opportunity Designing materials and chemicals to address society’s most pressing challenges will require joint reasoning across the domains of language, vision, and chemical structure. As Mirror’s lead of multimodal AI, you will architect and train multimodal generative models to understand, navigate, and design within the scope of physics, chemistry, and materials science, using high-quality observational data to fuel concept discovery at scale. Key Responsibilities Design & build multimodal architectures fusing text, vision, and chemical structure. Curate & align heterogeneous datasets from scientific literature, experimental data, and high-fidelity physical simulations. Develop training pipelines for large-scale pre-training and instruction tuning on multi-GPU/TPU clusters Create novel evaluations for cross-modal reasoning (text→structure, image→reaction pathway, etc.) and physical consistency. Collaborate with AI, applied science, and engineering teams to build a product pipeline by integrating multimodal embeddings into search, reasoning agents, and generative design loops. Engage with the AI-for-science community through publication and contributions at NeurIPS, ICML, ICLR, or other domain venues. Who you are Ph.D. or M.S./B.S. with equivalent research record in Computer Science, Materials Science, Chemistry, or related field with emphasis on machine learning 3+ years research experience with at least two modalities (language, vision, 3-D molecules/point clouds, graphs). Fluency in Python plus modern ML stacks (PyTorch/JAX) and familiarity with distributed training tooling (CUDA, NCCL, Slurm/K8s/Ray). Proven track record shipping large-scale generative or contrastive models (e.g., LLMs, diffusion, VAE, CLIP, NeRF, equivariant GNNs). Strong publication or open-source track record in ML for physical sciences. Excellent collaboration, communication, and team-working skills. Deep commitment and passion for advancing science. Preferred Extras Familiarity with quantum chemistry, atomistic simulation, or chemistry/materials science Familiarity with active learning, retrieval-augmented generation, or agentic workflows for scientific automation. Prior work aligning multimodal models with scientific knowledge bases or ontologies. What We Offer Competitive salary + meaningful equity Full health, dental, and vision benefits for you and your family Personal fitness budget Unlimited PTO and all national holidays Location & Work Model Hybrid work available; in-office preferred. Visa sponsorship available. Equal Opportunity Mirror is an equal-opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.