Machine Learning Scientist III, Growth Marketing (Gen AI)

Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success.

Why Join Us?

To shape the future of travel, people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs, differences are celebrated and know that when one of us wins, we all win.

We provide a full benefits package, including exciting travel perks, generous time-off, parental leave, a flexible work model (with some pretty cool offices), and career development resources, all to fuel our employees' passion for travel and ensure a rewarding career journey. We’re building a more open world. Join us.

Introduction to the team:

We create and deliver an aligned, dedicated marketing strategy to fuel each Expedia Group brand's success. Since our travelers interact with us through our brands, we have a brand focus in our marketing, while leveraging the scale and efficiency we’ve built in functional expertise. 

At Expedia Group, we leverage the power of AI to drive innovation and enhance user engagement. Our ACI science team operates at the forefront of the dynamic business landscape, focused on continuous testing, learning, and delivering high returns on investments using AI-driven solutions.

As a seasoned Machine Learning Scientist III, you'll be a senior leader driving advancements in state-of-the-art Gen AI and Multimodal LLMs (text, image, videos, music and voice overlay), and applying your expertise to real-world data with excellent tech mentorship. Your responsibilities include developing end-to-end scalable AI solutions for both multimodal inference and generation tasks that significantly impact revenue and help us to expand our creative ads. Serving as the resident expert on fundamental computer vision and NLP methods, you will drive algorithmic performance, develop, and improve content generation and inference models, and influence C-suite for positive outcomes, steering the marketing channel towards improved revenue, reduced costs by automation, increased customer engagement, and enhanced brand value.

In this role, you will:

• Develop Gen AI & Multimodal frameworks with superior performance to power Expedia’s ACI (Artificial Creative Intelligence) platform and products

• Develop cutting-edge, end-to-end content generation models (image-to-video, text-to-voice, image-to-text, text-to-video, etc) by fine-tuning state-of-the-art diffusion models using Expedia's image and video assets.

• Develop innovative Multimodal frameworks for several inference and moderation tasks (image, video, music, and text understanding)

• Improve our Multimodal LLMs and Gen AI modules(few-shot prompting, fine-tuning and training from scratch)

• Innovate image and video ranking/scoring solutions (aesthetic quality and relevance) for both user and AI created contents.

• Innovate AI search modules using advanced NLP models capable of dynamically suggest Expedia's products (lodging, flight, packages, etc) in our chatbots.

• Combine different fine-tuned/pre-trained models (Multimodal LLMs, CNN, BERT, plus our in-house computer vision/NLP models, etc) to build different content moderation, ranking and inference frameworks.

• Communicate complex analytical and technical topics to multiple partners/stakeholders and senior leadership, fostering cross-functional collaboration.

Experience and expectations:

• 4+ years of relevant work experience in using Multimodal LLMs and Gen AI models for content moderation, inference, ranking and generation.

• Master’s or PhD degree in Computer Science, Statistics, Economics, Engineering, Applied Mathematics or related quantitative field; or equivalent related professional experience.

• Applied experience with state-of-the-art video diffusion models (fine-tuning and training from scratch)

• Experience with fine-tuning Gen AI models for automated content creation (image, video, text, and music)

• Strong object-oriented programming skills in Python and PySaprk (hands-on experience is a must)

• Expertise in fundamental neural network models (CNN, LSTM, tra