Principal Data Platform Engineer

The Data Platform team builds the foundation that powers everything from Stitch Fix's signature personalization to our most cutting-edge AI innovations. We exist to make our data scientists and engineers wildly productive - by delivering fast, flexible, and trusted infrastructure that fuels experimentation, recommendations, insights, and a new generation of AI/ML-powered experiences.

As a Data Platform Engineer, you'll evolve Stitch Fix's modern data stack to support the next wave of AI/ML-powered products, analytics, and knowledge systems. This is a high-impact individual contributor role on the Data Platform team.

You’ll help make our data platform easier to scale, easier to find information in, and more reliable as we build AI into our workflows. You’ll work with teams across the company to make sure our systems can support smarter automation and deliver better insights.

• Evolve our core data stack (Spark, Trino, Iceberg, Kafka, Flink) to meet the scale and latency demands of AI workloads
• Define and implement observability, lineage, and access standards for our data products and AI applications
• Support critical data pipelines while creating abstractions that simplify end-user interactions
• Unify workflows from data ingestion to model serving, ensuring a shared foundation for feature stores, ML observability, and semantic modeling
• Design and build foundational AI data capabilities supporting LLM orchestration, retrieval-augmented generation (RAG/GraphRAG), semantic data layers, and vectorized search
• Work with teams to build well-documented, AI-friendly datasets that power analytics, personalization, and better business decisions

• You have 8+ years of experience building cloud-scale data infrastructure or ML platforms
• You've contributed to AI-focused systems such as LLM APIs, RAG/GraphRAG, vector search, or knowledge graphs
• You've worked with vector and graph databases to support intelligent querying and semantic discovery
• You're hands-on with Spark, SQL, and Python and/or Scala with strong experience building scalable APIs and services
• You understand streaming systems such as Kafka or Flink and how to design for real-time insights
• You have experience with orchestration systems, CI/CD, and production monitoring
• You're interested in defining data product standards, governance-by-design, and AI observability metrics
• You thrive in cross-functional, collaborative environments and navigate evolving priorities effectively
• You're detail-oriented, curious, and passionate about building infrastructure people love to use

• We are a group of bright, kind people who are motivated by challenge. We value integrity, innovation and trust. You’ll bring these characteristics to life in everything you do at Stitch Fix.
• We cultivate a community of diverse perspectives— all voices are heard and valued.
• We are an innovative company and leverage our strengths in fashion and tech to disrupt the future of retail. 
• We win as a team, commit to our work, and celebrate grit together because we value strong relationships.
• We boldly create the future while keeping equity and sustainability at the center of all that we do. 
• We are the owners of our work and are energized by solving problems through a growth mindset lens. We think broadly and creatively through every situation to create meaningful impact.
• We offer comprehensive compensation packages and inclusive health and wellness benefits.