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Applied AI Researcher, Post-Training

150k – 250kSan Francisco, CANew York, NYHybrid
Summary

Develops and evaluates post-training techniques like supervised fine-tuning, RLHF/DPO, and continual adaptation to align foundation models with enterprise systems. Requires expertise in adapting LLMs/SLMs, compound AI systems, and strong prototyping skills.

About the role

Key Responsibilities

  • Adapt foundation models to real-world performance and alignment requirements using supervised fine-tuning, preference optimization (DPO, RLHF, RLAIF), and continual adaptation.
  • Develop and evaluate techniques to align models with enterprise systems.
  • Investigate methods for aligning large models with human and system-level objectives.
  • Explore trade-offs between generalization and specialization, data efficiency and robustness, capability and controllability.

Requirements

  • Deep understanding of post-training techniques: supervised fine-tuning, preference optimization (RLHF/DPO), LoRA/PEFT, instruction-tuning pipelines.
  • Experience adapting frontier models (LLMs/SLMs) to specialized domains via data curation, reward modeling, or continual pretraining.
  • Expertise in compound AI systems, agentic collaboration (ensembling, ReAct, graph-of-thoughts).
  • Proven research track record (publications, public work).
  • Daily use of AI tools (ChatGPT, Cursor, Perplexity).
  • Strong programming and data analysis skills for prototyping and experiments.

What We Offer

  • Base salary: $150K–$250K (depending on experience, location, level).
  • Equity, comprehensive benefits: 100% covered medical/dental/vision, 401(k), commuter benefits, in-office lunch.
  • Access to state-of-the-art models and AI tools.
Skills
RLHFDPORLAIFLoRAPEFTSupervised Fine-TuningInstruction TuningLLMsSLMsReActGraph-of-ThoughtsData CurationReward Modeling
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