Freelance Credit Risk Modeling Jobs in Arizona (NOW HIRING)

About Carvana...

At Carvana, we're changing the way people buy and sell cars. With an ambitious vision and a fundamentally different approach designed to be fun, fast, and fair, Carvana became the fastest-growing automotive retailer in history. We expanded nationally, went public on the New York Stock Exchange, sold our 1 millionth car, and reached the Fortune 500, all in just eight years.

Today, with 4 million retail customers and counting, Carvana is both the fastest-growing and the most profitable public automotive retailer, and we're just getting started. We continue to raise the bar for our customers as we tackle the enormous opportunity still ahead in the largest consumer vertical.

Working here means being part of a team that embraces change, celebrates creative problem solving, and always strives to be better. At Carvana, you'll have the opportunity to take on meaningful challenges, learn quickly, and help shape the future of automotive retail. If you're driven to grow and make an impact as part of a collaborative team, you'll fit right in. Learn more about what it's like to work here from the people that already do.

Work Model: This is a 100% on-site role at our Tempe office, Monday through Friday.

About the Role

This role sits within Carvana's Credit & Risk modeling space, working on high-impact predictive models that inform risk assessment and decisioning across the business.

We are looking for a senior individual contributor who will help advance the technical capabilities of our core credit and risk models by developing, validating, and productionizing new modeling techniques and data signals.

Success in this role comes from steady, compounding improvement—introducing new ideas pragmatically, proving value early, and iterating toward more sophisticated approaches over time. While the work will focus on flagship credit and risk models, successful techniques and signals are expected to scale outward to other models and teams through shared workflows and modeling infrastructure.

This role is well suited for someone who operates comfortably at the intersection of advanced modeling and real-world delivery to balance tradeoffs between complexity and business objectives.

What You'll Be Doing

• Improve core credit and risk models through a sequence of incremental advancements in accuracy, robustness, and coverage over time.
• Leverage a wide range of structured and unstructured data sources across multiple modalities to drive sustained improvements in model accuracy and decision quality.
• Design, train, and deploy advanced machine learning models, including (but not limited to) gradient boosting, representation learning, embeddings, and transformer-based approaches.
• Use high-impact models as a testing ground for new techniques and data modalities, validating which ideas deliver measurable lift in production.
• Build and apply rigorous evaluation frameworks (offline validation, backtests, simulations, online experiments) to guide iteration and decision-making.
• Exercise strong judgment about model complexity and tradeoffs, balancing sophistication with reliability and maintainability.
• Partner closely with data engineering and platform teams to ensure models are production-ready, scalable, monitorable, and maintainable.
• Translate successful work into reusable patterns, abstractions, or signals that can be adopted across other modeling efforts.
• Serve as a technical leader within the Predictive Modeling organization through design reviews, code reviews, and informal mentorship.

What You Should Have

• 5-8+ years of experience building and deploying predictive models in production environments.
• A demonstrated track record of delivering models and improving them iteratively over time, not just developing them offline.
• Strong experience with modern machine learning techniques (e.g., LightGBM/XGBoost, neural networks, representation learning).
• Excellent statistical intuition, including comfort reasoning about bias/variance tradeoffs, generalization, and experimental validity.
• Fluency in Python and SQL, with production-quality coding standards.
• Proven ability to take ambiguous, open-ended modeling problems from idea → experiment → production impact.
• Bachelor's degree in Computer Science, Statistics, Math, Quantitative Economics, or similar field from an accredited undergraduate institution required.

If would also be great if you had

• Hands-on experience with embeddings, transformers, or other deep representation models in real-world systems.
• Experience integrating unstructured or semi-structured data (text, images, documents, device signals) into predictive models.
• Familiarity with model monitoring, drift detection, and retraining strategies for high-impact decision systems.
• Experience working in credit, risk, fraud, underwriting, or similar high-stakes modeling environments.

Notes on Experience

• Research experience is a plus only if paired with a strong bias toward delivery and production impact.

What Success Looks Like

Over time, success in this role is reflected by:

• Measurable improvements in the accuracy, robustness, or coverage of core credit and risk models.
• New modeling techniques or data signals that transition from experimentation into sustained production use.
• Clear patterns or abstractions that enable other teams to adopt and build on this work.
• Strong alignment between modeling advances and real business outcomes.

What we'll offer in return

• Full-Time Salary Position with a competitive salary.
• Medical, Dental, and Vision benefits.
• 401K with company match.
• A multitude of perks including student loan payments, discounts on vehicles, benefits for your pets, and much more.
• A great wellness program to keep you healthy and happy both physically and mentally.
• Access to opportunities to expand your skill set and share your knowledge with others across the organization.
• A company culture of promotions from within, with a start-up atmosphere allowing for varied and rapid career development.
• A seat in one of the fastest-growing companies in the country.

Legal Stuff

Hiring is contingent on passing a complete background check. This role is eligible for visa sponsorship.

Carvana is an equal employment opportunity employer. All applicants receive consideration for employment without regard to race, color, religion, gender, sexual orientation, gender identity or expression, marital status, national origin, age, mental or physical disability, protected veteran status, or genetic information, or any other basis protected by applicable law. Carvana also prohibits harassment of applicants or employees based on any of these protected categories.

Please note this job description is not designed to contain a comprehensive listing of activities, duties, or responsibilities that are required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.