Marzieh Saeidi

As a hands-on Applied Scientist and NLP/ML Tech Lead with over a decade of experience, I specialise in building and leading projects at the intersection of language, multimodal understanding, and generative AI. My recent work focuses on developing agentic AI systems and co-pilot experiences that help users create and interact with complex products more intuitively. At Synthesia, I established and led the NLP research team, focusing on enhancing the emotional expressiveness of digital humans. I collaborated closely with the audio and video teams to design experiments, collect and annotate multimodal emotion data, and evaluate models that make avatars more natural and engaging. My team delivered large-scale annotated datasets, developed complex evaluation frameworks, built prototypes from concept to production, and drove product innovation through close collaboration with engineering and product functions. Previously at Meta, I contributed to applied AI research for integrity and customer support, leveraging few-shot learning and extreme classification to build scalable, high-impact solutions. I am passionate about translating research advances into deployable, user-centric products—combining product thinking, technical leadership, and a strong delivery mindset. Known for my ability to communicate effectively across disciplines, I thrive in cross-functional environments that value experimentation, learning, and building trustworthy AI systems that make technology more human. **Areas of Expertise** LLMs & Multimodal AI • Agentic Workflows • Emotion Modelling • Product Discovery & Delivery • Cross-Functional Leadership • NLP Research • Applied Machine Learning