• Contribute towards the long-term vision for building 10-star, personalized community support, building a platform where our AI understands each guest and host the way their best human advocate would, and responds accordingly. • Partner with data science, ML, and operations to identify new high-signal personalization signals to serve user needs • Own the product roadmap across ML models, signals, schemas, and prompt optimization to ensure the right information reaches the model in the most effective form. • Drive personalization experiment design and measurement: define KPIs (self-solve rate, personalization coverage, citation accuracy), lead experiment design, and translate results into clear product decisions. • Collaborate with ML engineers to shape requirements for accuracy, latency, and scalability improvements. • Scale personalization infrastructure across Airbnb's AI surfaces, ensuring the platform is extensible enough to serve each modality's unique needs. • Build a framework for continuous improvement: define how the team identifies personalization failures, prioritizes fixes, and systematically closes the gap between AI and human agent performance. • Collaborate across engineering, ML, design, data science, and policy to build consensus on prioritization, drive cross-functional alignment, and ship with rigor from concept to production.

Role Description As an AI Systems Builder focused on real estate, you will play a pivotal role in designing and developing innovative AI-powered tools and platforms that streamline operations and enhance agent productivity. In this role, you will collaborate with a dynamic team to build scalable solutions that go beyond simple prompting, delivering structured workflows, automations, dashboards, and custom resources for both internal use and real estate professionals. Your work will directly impact how agents, clients, and team members leverage AI to improve efficiency and deliver value. - Design and build AI-powered tools, platforms, and workflow systems for internal operations and real estate use cases - Develop scalable AI solutions, including automations, apps, dashboards, and custom tools - Collaborate with team members to enhance, test, and expand existing AI initiatives - Create AI-based resources for real estate agents, such as guides, frameworks, templates, and interactive tools - Rapidly iterate on prototypes and MVPs based on feedback and evolving needs - Evaluate new AI tools, LLMs, and platforms to optimize operations and client/member experience - Document workflows, tool logic, implementation steps, and user instructions for technical and non-technical audiences - Productize internal AI outputs into polished resources for team, agents, clients, and members - Troubleshoot issues across AI tools, automations, integrations, and platform workflows - Provide proactive recommendations and adapt in a fast-moving AI environment Qualifications - 3+ years of hands-on experience building AI tools, systems, workflows, platforms, or technical solutions from scratch or near-scratch - Experience creating educational or client/member-facing AI resources, such as guides, frameworks, templates, or interactive tools - Hands-on experience using LLM tools (e.g., ChatGPT, Claude) in building AI solutions - Ability to build custom AI workflows that include automations and integrations beyond prompt-only usage - Familiarity with real estate workflows and agent audiences/content operations - Strong understanding of LLM-based system development workflows, including automation logic, integrations, and scalable tool design - Professional English proficiency - Legally able to work in Colombia, Argentina, Mexico, Honduras, or Venezuela as a contractor Preferred Qualifications - Experience working in fast-moving, experimental environments - Strong documentation skills for translating technical workflows into clear guides and resources - Experience creating educational resources for real estate professionals - Self-directed with the ability to learn new platforms quickly with minimal guidance Benefits - Unlimited earning potential if you choose to take on multiple clients and have the capacity - Generous health allowance to support your well-being - Profit-sharing opportunities as the company grows - Access to exclusive upskilling and training in AI, operations, and leadership - Monthly raffles and performance bonuses - A tight-knit, supportive community and a dedicated Talent Success Manager to guide your journey

Requisition Number: 2353883 Optum Tech is a global leader in health care innovation. Our teams develop cutting-edge solutions that help people live healthier lives and help make the health system work better for everyone. From advanced data analytics and AI to cybersecurity, we use innovative approaches to solve some of health care's most complex challenges. Your contributions here have the potential to change lives. Ready to build the next breakthrough? Join us to start Caring. Connecting. Growing together. Optum AI is UnitedHealth Group's enterprise AI team. We are AI/ML scientists and engineers with deep expertise in AI/ML engineering for health care. We develop AI/ML solutions for the highest impact opportunities across UnitedHealth Group businesses including UnitedHealthcare, Optum Financial, Optum Health, Optum Insight, and Optum Rx. In addition to transforming the health care journey through responsible AI/ML innovation, our charter also includes developing and supporting an enterprise AI/ML development platform. Optum AI team members: - Have impact at scale: We have the data and resources to make an impact at scale. When our solutions are deployed, they have the potential to make health care system work better for everyone - Do ground-breaking work: Many of our current projects involve cutting edge ML, NLP and LLM techniques. Generative AI methods for working with structured and unstructured health care data are continuously being developed and improved. We are working in one of the most important frontiers of AI/ML research and development - Partner with world-class experts on innovative solutions: Our team members are developing novel AI/ML solutions to business challenges. In some cases, this includes the opportunity to file patents and publish papers about the methods we develop. We also collaborate with AI/ML researchers at some of the world's top universities You'll enjoy the flexibility to work remotely * from anywhere within the U.S. as you take on some tough challenges. For all hires in the Minneapolis or Washington, D.C. area, you will be required to work in the office a minimum of four days per week. Primary Responsibilities: - Apply advanced statistical, predictive modeling, and Agentic AI to optimize healthcare and digital experiences - Collaborate with the Responsible Use of AI (RUAI) team to ensure that the delivered solutions are compliant with company policies and standards - Research innovative approaches for developing and evaluating Agentic AI solutions, and apply these findings to the solutions you are creating - Develop code and model documentation, patents and publications in scientific conferences and journals - Collaborate with engineering teams to develop robust data pipelines of MLOps procedures for new solutions - Stay up to date with latest technologies and literature You'll be rewarded and recognized for your performance in an environment that will challenge you and give you clear direction on what it takes to succeed in your role as well as provide development for other roles you may be interested in. Required Qualifications: - PhD in Statistics, Mathematics, Computer Science or related field - 3+ years of AI/ML experience (LLM, NLP) - Experience with LLM frameworks and/or NLP approaches such as text embedding and text classification - Proficiency in AI/ML engineering development with Python - Expertise in Large Language Modeling and Transformer Architectures with experience in prompt engineering, evaluation, and LLM optimization Preferred Qualifications: - Experience with AI Cloud services like Azure ML, Databricks, Azure OpenAI, or similar services in GCP / AWS - Experience with Snowflake and other relational databases - Proven solid publication record in top tier AI/ML/NLP venues (e.g., NeurIPS, ICML, ICLR, ACL, EMNLP, CHIL, etc.) - Proven solid technical communication skills *All employees working remotely will be required to adhere to UnitedHealth Group's Telecommuter Policy Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. In addition to your salary, we offer benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with us, you'll find a far-reaching choice of benefits and incentives. The salary for this role will range from $91,700 to $163,700 annually based on full-time employment. We comply with all minimum wage laws as applicable. Application Deadline: This will be posted for a minimum of 2 business days or until a sufficient candidate pool has been collected. Job posting may come down early due to volume of applicants. At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone-of every race, gender, sexuality, age, location and income-deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes - an enterprise priority reflected in our mission. UnitedHealth Group is an Equal Employment Opportunity employer under applicable law and qualified applicants will receive consideration for employment without regard to race, national origin, religion, age, color, sex, sexual orientation, gender identity, disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations. UnitedHealth Group is a drug - free workplace. Candidates are required to pass a drug test before beginning employment. #OptumTechPJ

• Audit workflows across teams, identify inefficiencies, and recommend AI-powered solutions that have a real impact on how people work • Develop training materials, best practice guides, and workshops that drive meaningful adoption of tools like ChatGPT, Claude, and others • Identify opportunities for custom plugins or automations, and work with the tech team to scope and build solutions that go beyond out-of-the-box functionality • Stay sharp on the latest AI releases and industry developments, and bring that knowledge back to the organization in actionable way • Ability to translate complex technical concepts for non-technical audiences