Expedia, Inc.
Machine Learning Scientist III - Growth Marketing (Production GenAI & Agentic Mu
Expedia, Inc., Seattle, Washington, us, 98127
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, our Growth Marketing team is redefining how data-driven marketing meets AI-powered, agentic automation. We drive performance through best-in-class, scalable machine learning, deploying production-ready multimodal LLMs,
GenAI
, and agentic NLP architectures. Our agentic systems power everything from personalized travel discovery to real-time, cross-platform campaign execution at massive scale. Explore “Trip Matching” on Instagram for a glimpse into our production
chatbot
transforming
inspiring
reels
and posts
into
hotel
recommendation
. As an ML Scientist III, your mission is to
engineer,
and
scale production AI workflows, agents, and multimodal LLM pipelines
,
leveraging
both in-house and third-party systems.
You’ll
develop agentic solutions with advanced orchestration tools like
LangGraph
,
Langfuse
, RAG, and the latest frameworks
,
owning end-to-end delivery and optimizations for inference and
GenAI
systems. In this role, you will: Develop
and
deploy
complex agentic and multimodal AI workflows at production scale
, architecting memory-enabled, context-aware agents that drive dynamic automation, personalization,
real-time
monitoring
and content generation.
Design and orchestrate advanced LLM and RAG-driven agent solutions
using modular frameworks including
LangGraph
,
Langfuse
,
CrewAI
,
AutoGen
, and other emerging agentic orchestration tools—enabling adaptive, stateful, and highly interactive workflow graphs.
Integrate and
optimize
complete multimodal
GenAI
pipelines: text-to-image, image-to-video, text-to-video, and text-to-voice,
leveraging
and extending
in-house
and
third party
models
.
F
ine-tune (parameter-efficient tuning,
LoRA
,
QLoRA
, etc.), and evaluate (perplexity, accuracy, creativity metrics) both open-source (Llama, MPT, Phi-4, etc.) and commercial LLMs (OpenAI GPT-4, Gemini, Claude).
Pioneer LLM-based simulation
& evaluation
environments
(e.g., LLM-as-a-Judge)
: Leverage the latest LLMs, multi-agent systems, and generative tools to simulate user behavior, accelerate experimental cycles, and rigorously
evaluate
new features or workflows in
both
synthetic
and prod
online shopping and travel environments.
Simulate
A/B
testing
via LLM simulations:
Build
A/B test agents
capable
of
simulating
user engagement, behavioral outcomes, and marketing scenarios to complement and
replace large-scale online testing—enabling rapid iteration, robust pre-deployment validation, and deeper insight into agentic/LLM-driven feature impact.
Continuously adopt and iterate on the latest frameworks, staying current with state-of-the-art in agentic orchestration, memory models, multimodal
GenAI
, LLM pipelines, and LLM operation (RAG, memory, tracing, evaluation).
Collaborate deeply with engineering, marketing, and product teams to translate evolving business objectives into scalable and observable AI-driven solutions.
Experience and
qualifications: Minimum
7
+
years
experience
delivering robust, scalable AI/
GenAI
solutions at enterprise scale with
a
Bachelors
degree (4-5+ year of relevant experience with a Masters/Ph
D
in CS, EE, Stats
)
A
gentic
f
rameworks
experience
working with
platforms such as
LangGraph
,
Langfuse
, RAG,
CrewAI
,
AutoGen
, and comparable agent workflow frameworks
Ab
ility
to design complex agent graphs with memory, tool calling, and multi-step reasoning
Multimodal and
a
gentic AI
experience in both commercial and open-source models (VLMs, CLIP, Phi-4, DINO,
et
c
), advanced LLM pipeline design, and shipping both inference and generative AI features to users
Hands-on experience in fundamental neural network models (CNN, Transformers, BERT, VAEs,
Multimodals
etc
)
Proven
expertise
in architecting persistent, hybrid, and context-managed memory for agentic workflows
Strong in Python (
PyTorch
,
HuggingFace
, etc.),
MLOps
, distributed systems (
PySpark
, Databricks, Airflow), and scalable API engineering
Deep experience with tracing, logging, and observability stacks (
Langfuse
,
PromptLayer
, Weights & Biases, etc.), including prompt monitoring and model evaluation in live production
Ability to t
ranslate complex technical systems into actionable solutions for cross-functional teams,
leveraging
M
ultimodal
LLM
s and Gen AI models
The total cash range for this position in Seattle is $137,500.00 to $192,500.00. Employees in this role have the potential to increase their pay up to $220,000.00, which is the top of the range, based on ongoing, demonstrated, and sustained performance in the role. Starting pay for this role will vary based on multiple factors, including location, available budget, and an individual’s knowledge, skills, and experience. Pay ranges may be modified in the future. Expedia Group is proud to offer a wide range of benefits to support employees and their families, including
medical/dental/vision,
paid time off, and an Employee Assistance Program. To fuel each employee’s passion for travel, we offer a wellness & travel reimbursement, travel discounts, and an International Airlines Travel Agent (
IATAN
) membership.
View our full list of benefits
. Accommodation requests If you need assistance with any part of the application or recruiting process due to a disability, or other physical or mental health conditions, please reach out to our Recruiting Accommodations Team through the
Accommodation Request . We are proud to be named as a Best Place to Work on Glassdoor in 2024 and be recognized for award-winning culture by organizations like Forbes, TIME, Disability:IN, and others. Expedia Group's family of brands includes: Brand Expedia, Hotels.com, Expedia Partner Solutions, Vrbo, trivago, Orbitz, Travelocity, Hotwire, Wotif, ebookers, CheapTickets, Expedia Group Media Solutions, Expedia Local Expert, CarRentals.com, and Expedia Cruises.
2024 Expedia, Inc. All rights reserved. Trademarks and logos are the property of their respective owners. CST: 2029030-50 Employment opportunities and job offers at Expedia Group will always come from Expedia Group’s Talent Acquisition and hiring teams. Never provide sensitive, personal information to someone unless you’re confident who the recipient is. Expedia Group does not extend job offers via email or any other messaging tools to individuals with whom we have not made prior contact. Our email domain is @expediagroup.com. The official website to find and apply for job openings at Expedia Group is
careers.expediagroup.com/jobs
. Expedia is committed to creating an inclusive work environment with a diverse workforce. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. This employer participates in E-Verify. The employer will provide the Social Security Administration (SSA) and, if necessary, the Department of Homeland Security (DHS) with information from each new employee's I-9 to confirm work authorization. #J-18808-Ljbffr
leveraging
the scale and efficiency
we’ve
built in functional
expertise
. At Expedia Group, our Growth Marketing team is redefining how data-driven marketing meets AI-powered, agentic automation. We drive performance through best-in-class, scalable machine learning, deploying production-ready multimodal LLMs,
GenAI
, and agentic NLP architectures. Our agentic systems power everything from personalized travel discovery to real-time, cross-platform campaign execution at massive scale. Explore “Trip Matching” on Instagram for a glimpse into our production
chatbot
transforming
inspiring
reels
and posts
into
hotel
recommendation
. As an ML Scientist III, your mission is to
engineer,
and
scale production AI workflows, agents, and multimodal LLM pipelines
,
leveraging
both in-house and third-party systems.
You’ll
develop agentic solutions with advanced orchestration tools like
LangGraph
,
Langfuse
, RAG, and the latest frameworks
,
owning end-to-end delivery and optimizations for inference and
GenAI
systems. In this role, you will: Develop
and
deploy
complex agentic and multimodal AI workflows at production scale
, architecting memory-enabled, context-aware agents that drive dynamic automation, personalization,
real-time
monitoring
and content generation.
Design and orchestrate advanced LLM and RAG-driven agent solutions
using modular frameworks including
LangGraph
,
Langfuse
,
CrewAI
,
AutoGen
, and other emerging agentic orchestration tools—enabling adaptive, stateful, and highly interactive workflow graphs.
Integrate and
optimize
complete multimodal
GenAI
pipelines: text-to-image, image-to-video, text-to-video, and text-to-voice,
leveraging
and extending
in-house
and
third party
models
.
F
ine-tune (parameter-efficient tuning,
LoRA
,
QLoRA
, etc.), and evaluate (perplexity, accuracy, creativity metrics) both open-source (Llama, MPT, Phi-4, etc.) and commercial LLMs (OpenAI GPT-4, Gemini, Claude).
Pioneer LLM-based simulation
& evaluation
environments
(e.g., LLM-as-a-Judge)
: Leverage the latest LLMs, multi-agent systems, and generative tools to simulate user behavior, accelerate experimental cycles, and rigorously
evaluate
new features or workflows in
both
synthetic
and prod
online shopping and travel environments.
Simulate
A/B
testing
via LLM simulations:
Build
A/B test agents
capable
of
simulating
user engagement, behavioral outcomes, and marketing scenarios to complement and
replace large-scale online testing—enabling rapid iteration, robust pre-deployment validation, and deeper insight into agentic/LLM-driven feature impact.
Continuously adopt and iterate on the latest frameworks, staying current with state-of-the-art in agentic orchestration, memory models, multimodal
GenAI
, LLM pipelines, and LLM operation (RAG, memory, tracing, evaluation).
Collaborate deeply with engineering, marketing, and product teams to translate evolving business objectives into scalable and observable AI-driven solutions.
Experience and
qualifications: Minimum
7
+
years
experience
delivering robust, scalable AI/
GenAI
solutions at enterprise scale with
a
Bachelors
degree (4-5+ year of relevant experience with a Masters/Ph
D
in CS, EE, Stats
)
A
gentic
f
rameworks
experience
working with
platforms such as
LangGraph
,
Langfuse
, RAG,
CrewAI
,
AutoGen
, and comparable agent workflow frameworks
Ab
ility
to design complex agent graphs with memory, tool calling, and multi-step reasoning
Multimodal and
a
gentic AI
experience in both commercial and open-source models (VLMs, CLIP, Phi-4, DINO,
et
c
), advanced LLM pipeline design, and shipping both inference and generative AI features to users
Hands-on experience in fundamental neural network models (CNN, Transformers, BERT, VAEs,
Multimodals
etc
)
Proven
expertise
in architecting persistent, hybrid, and context-managed memory for agentic workflows
Strong in Python (
PyTorch
,
HuggingFace
, etc.),
MLOps
, distributed systems (
PySpark
, Databricks, Airflow), and scalable API engineering
Deep experience with tracing, logging, and observability stacks (
Langfuse
,
PromptLayer
, Weights & Biases, etc.), including prompt monitoring and model evaluation in live production
Ability to t
ranslate complex technical systems into actionable solutions for cross-functional teams,
leveraging
M
ultimodal
LLM
s and Gen AI models
The total cash range for this position in Seattle is $137,500.00 to $192,500.00. Employees in this role have the potential to increase their pay up to $220,000.00, which is the top of the range, based on ongoing, demonstrated, and sustained performance in the role. Starting pay for this role will vary based on multiple factors, including location, available budget, and an individual’s knowledge, skills, and experience. Pay ranges may be modified in the future. Expedia Group is proud to offer a wide range of benefits to support employees and their families, including
medical/dental/vision,
paid time off, and an Employee Assistance Program. To fuel each employee’s passion for travel, we offer a wellness & travel reimbursement, travel discounts, and an International Airlines Travel Agent (
IATAN
) membership.
View our full list of benefits
. Accommodation requests If you need assistance with any part of the application or recruiting process due to a disability, or other physical or mental health conditions, please reach out to our Recruiting Accommodations Team through the
Accommodation Request . We are proud to be named as a Best Place to Work on Glassdoor in 2024 and be recognized for award-winning culture by organizations like Forbes, TIME, Disability:IN, and others. Expedia Group's family of brands includes: Brand Expedia, Hotels.com, Expedia Partner Solutions, Vrbo, trivago, Orbitz, Travelocity, Hotwire, Wotif, ebookers, CheapTickets, Expedia Group Media Solutions, Expedia Local Expert, CarRentals.com, and Expedia Cruises.
2024 Expedia, Inc. All rights reserved. Trademarks and logos are the property of their respective owners. CST: 2029030-50 Employment opportunities and job offers at Expedia Group will always come from Expedia Group’s Talent Acquisition and hiring teams. Never provide sensitive, personal information to someone unless you’re confident who the recipient is. Expedia Group does not extend job offers via email or any other messaging tools to individuals with whom we have not made prior contact. Our email domain is @expediagroup.com. The official website to find and apply for job openings at Expedia Group is
careers.expediagroup.com/jobs
. Expedia is committed to creating an inclusive work environment with a diverse workforce. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. This employer participates in E-Verify. The employer will provide the Social Security Administration (SSA) and, if necessary, the Department of Homeland Security (DHS) with information from each new employee's I-9 to confirm work authorization. #J-18808-Ljbffr