Machine Learning Research Engineer

We're partnering with a frontier AI startupWe're working with an early-stage AI company that's redefining how models learn to understandsubjective quality , from writing tone and design aesthetics to emotional resonance and creative expression.They're collaborating with leading AI labs and building new methods that help models reason about creativity, taste, and quality. The founding team is small, highly technical, and deeply curious—building at the intersection ofresearch, product, and creativity .The Role As aMachine Learning Research Engineer , you'll own end-to-end research cycles—designing, running, and analyzing post‐training experiments that help models evaluate style and subjective quality. You'll collaborate directly with AI labs and creative experts, and have the opportunity to publish your work.What You'll DoTrainreward models, classifiers, and verifiersacross creative domains (writing, design, visual style)Developbenchmarks and evaluation methodsfor subjective tasksRunpost‐training (RLHF/DPO)experiments on open‐source and proprietary modelsCollaborate withAI labsand creative experts on pilots and research projectsPublishfindings through blogs and whitepapersWhat We're Looking For2–6+ yearsin post‐training, ML research, or ML engineeringStrong experience withPython, PyTorch, LLMs , andmultimodal modelsProven ability to run fast, iterative experiments from data to evaluationCuriosity forsubjective AI —creativity, tone, and aestheticsLow‐ego, collaborativemindset; thrives in a small, in‐person environmentBonusExperience working with post‐training data or data vendors (Scale, Labelbox, Snorkel, etc.)Personal interest in creative fields (design, art, writing, or similar)Why JoinBuild at theedge of AI and creativityCollaborate withfrontier research labsWork closely with an inspiring founding team inJackson Square, San FranciscoCompetitive salary and meaningful early‐stage equityCompensation:$200K–$350K + 0.25–1.5% equityInterview Process:We're proud to partner with a founder who values creativity, collaboration, and curiosity above ego.#J-18808-Ljbffr