Senior Machine Learning Engineer - Homes.com - Arlington, VA
costar/costarcareers
US-VA Arlington
Posted Sep 11, 2026
- Other
Job description
Senior Machine Learning Engineer - - Arlington, VA Job Description CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index, CoStar Group is on a mission to digitize the world’s real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives. We have been living and breathing the world of real estate information and online marketplaces for over 35 years, giving us the perspective to create truly unique and valuable offerings to our customers. We’ve continually refined, transformed, and perfected our approach to our business, creating a language that has become standard in our industry, for our customers, and even our competitors. We continue that effort today and are always working to improve and drive innovation. This is how we deliver for our customers, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate. is already one of the fastest growing real estate portals in the industry, we are driven to be #1. Just ask Brad Bellflower, Chief Change Officer at . After its acquisition in 2014, quickly turned into the most popular place to find a place. Proven success at the highest level – and we’re doing it again with the new . is a CoStar Group company with 20+ years' experience in leading and growing digital marketplaces. We pride ourselves on continually improving, innovating, and setting the standard for property search and marketing experiences. With we’re building a brand on the cusp of defining the industry. We’re looking for big thinkers, brave leaders, and creative advertising wizards ready to influence a new age of homebuying within a tried-and-true, award-winning company. Learn more about . This Machine Learning Engineer role focuses on building and scaling production-grade machine learning solutions that directly enhance CoStar’s products and customer experience. The engineer will work closely with software engineers, product leaders, and business stakeholders to develop, deploy, and optimize ML models across large-scale datasets, while helping evolve CoStar’s cloud-based machine learning platform. This position is located in Arlington, VA and will have a 4-day onsite schedule Monday-Thursday, with Fridays work from home. RESPONSIBILITIES: Collaborate on the continued improvement of CoStar’s cloud-based machine learning environment Design, build, test and deploy scalable, reusable and maintainable models that handle large amounts of data. Collaborate with other engineers, product owners, and leadership to create ML solutions that solve practical problems and improves our customer’s experience Gain an understanding of the CoStar business and how ML can improve things BASIC QUALIFICATIONS: Bachelor's degree required from an accredited, not-for-profit, in-person college/university A track record of commitment to prior employers 5+ years of professional development experience as Machine Learning Engineer, Data Scientist or related role 3+ years of programming experience with Python Experience with recommendation systems and (preferably) computer vision Strong foundations in ML concepts including supervised/unsupervised learning, model evaluation, feature engineering, and familiarity with deep learning frameworks (PyTorch or TensorFlow) PREFERRED SKILLS: Experience with ML cloud tools such as Databricks, Amazon Personalize, SageMaker Experience with SQL-based relational databases (e.g. AWS RDS) or document-based databases (e.g. DynamoDB). Experience solving streaming and batch data processing problems at scale Experience building, deploying and optimizing ML models WHAT’S IN IT FOR YOU: When you join CoStar Group, you’ll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed. We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training and tuition reimbursement. Our benefits package includes (but is not limited to): Comprehensive healthcare coverage: Medical / Vision / Dental / Prescription Drug Life, legal, and supplementary insurance Commuter and parking benefits 401(K) retirement plan with matching contributions Employee stock purchase plan Paid time off Tuition reimbursement Complimentary gourmet coffee, tea, hot chocolate, prepared foods, fresh fruit, and other healthy snacks The final salary or hourly rate offered for this role with fall within the range set forth below based on a variety of factors, including but not limited to, geographic location, skills, and competencies. Base Compensation: $166,000-204,000 #LI-AV1 # CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing