Senior Fullstack Engineer - Mortgage Fulfillment AI

Zillow Group; Myrtle Point (OR); À distance; USD 150 000 - 240 000; Plein temps

Résumé du poste

Zillow Group is seeking a Senior Software Development Engineer to design, build, and operate production-grade agentic AI systems for mortgage Fulfillment. You will own end-to-end architecture across agent design, evals infra, and core agent infrastructure from design to deployment.

The role emphasizes reliability, observability, and scalable integrations with Encompass/DocuTech. You will collaborate with admins, Fulfillment ops, and Platform engineers while promoting best practices and mentoring

Qualifications

• Bachelor's degree in CS or related field.
• 8+ years of professional software engineering experience.
• Own AI/ML system in production end to end with accountability for correctness, cost, and reliability.
• Experience with eval pipelines and multi-step AI workflows.
• Strong infrastructure instincts and AI fluency.

Responsabilités

• Design and build multi-step AI agents coordinating mortgage Fulfillment workflows.
• Build evaluation frameworks measuring agent reliability and task completion.
• Architect and operate core agent infrastructure including model serving, prompt pipelines, batching, queueing, and observability.
• Build robust integrations with Encompass and DocuTech within their extension points.
• Collaborate with Encompass admins, Fulfillment operations, and Platform engineers to refine requirements and deliver iteratively.
• Set and advocate for engineering best practices in testing, measurement, observability, and incident response, mentoring engineers.

Connaissances

AI fluency

System design

Cloud services

Eval pipelines

Observability

Formation

Bachelor's degree in CS/related field

Outils

Model serving

LLM frameworks

Third-party integrations

Description du poste

Role overview

The Senior Software Development Engineer designs, builds, and operates production-grade agentic AI systems for mortgage Fulfillment. This role focuses on agentic AI, not general feature work, and centers on three areas: agent design and architecture, evaluation (evals) infrastructure, and the core infrastructure that runs agents. You'll own the architecture of your workstreams from end to end, surface tradeoffs, and drive technical decisions on a problem with no existing playbook. This is an individual contributor role.

Responsibilities

• Design and build multi-step AI agents that coordinate Fulfillment workflows such as document collection, condition clearing, and closing coordination, without requiring a person to step in at every step.
• Build evaluation frameworks that measure agent reliability, accuracy, and task completion, and use that signal to improve prompts, models, and fallbacks.
• Architect and operate core agent infrastructure, including model serving, prompt pipelines, batching, queueing, and observability, designed for reliability: idempotency, retries, graceful degradation, and structured logging.
• Build robust integrations with third-party platforms such as Encompass and DocuTech, working within their constraints and extension points to read state and write actions back reliably.
• Collaborate closely with Encompass administrators, Fulfillment operations, and Platform engineering partners to refine requirements, break down work, and deliver iteratively.
• Set and advocate for engineering best practices in testing, measurement, observability, and incident response, and mentor other engineers through code reviews and design discussions.

Role details

This role has been categorized as a Remote position. employees do not have a permanent corporate office workplace and, instead, work from a physical location of their choice, which must be identified to the Company. U.S. employees may live in any of the 50 United States, with limited exceptions.

Salary and location

In California, Connecticut, Maryland, Massachusetts, New Jersey, New York, Washington state, and Washington DC the standard base pay range for this role is $164,400.00 - $262,600.00 annually. This base pay range is specific to these locations and may not be applicable to other locations. In Colorado, Hawaii, Illinois, Maine, Minnesota, Nevada, Ohio, Rhode Island, Vermont, and Virginia the standard base pay range for this role is $156,200.00 - $249,400.00 annually. The base pay range is specific to these locations and may not be applicable to other locations. In addition to a competitive base salary this position is also eligible for equity awards based on factors such as experience, performance and location. Actual amounts will vary depending on experience, performance and location. Employees in this role will not be paid below the salary threshold for exempt employees in the state where they reside.

Who you are

• Bachelor's degree in Computer Science, Computer Engineering, or a related technical field, or an equivalent combination of education and experience.
• 8+ years of professional software engineering experience, including building and operating scalable, reliable services in a modern cloud environment.
• Proven experience owning an AI or ML system in production from end to end (designing, shipping, measuring, and iterating on it) with accountability for correctness, cost, and reliability.
• Hands-on experience in at least two of these areas: designing and running eval pipelines (including producing labeled data at scale); operating LLM or ML model serving and orchestrating multi-step AI workflows; building reliable integrations with third-party platforms and external APIs.
• Strong infrastructure instincts alongside AI fluency.
• You know agents often fail in production because of timeouts, race conditions, malformed payloads, and retry storms, not only because of the model.
• A bias toward measurement: you define what correct looks like, build the tooling to check it, and use that signal to improve the system.
• Comfort with ambiguity and a track record of going deep in a specialized domain.
• Mortgage experience (rules like TRID and RESPA) isn't required, but the drive to learn it quickly is.
• Or an equivalent combination of education and experience.

Get to know us

At Zillow, we're reimagining how people move—from the real estate market to their careers. As the most-visited real estate platform in the U.S., we help people navigate buying, selling, financing and renting with greater ease and confidence. Whether you're working in tech, sales, operations, or design, you'll be part of a company reshaping an industry and helping more people make home a reality. How we work is a key part of that transformation. Through Cloud HQ, our strategic approach to distributed work, most employees have the flexibility to work from wherever they're most productive—enabling us to move fast, stay connected and deliver on our people promise. Zillow is honored to be recognized among the best workplaces in the U.S. Zillow was named one of FORTUNE 100 Best Companies to Work For in 2026, and included on TIME's America's Best Companies 2026 list, reflecting our commitment to creating an innovative, inclusive, and engaging culture where employees are empowered to grow. No matter where you sit in the organization, your work will help drive innovation, support our customers, and move the industry—and your career—forward, together. Zillow Group is an