Software Engineer - Data Flywheel

Perplexity serves tens of millions of users daily with reliable, high-quality answers grounded in an LLM-first search engine and specialized data sources. The Answer Quality team ensures that our prompts, tools, search, and specialized datasets, combined with both frontier and in-house models, create the best possible experience for our users. As our product evolves, our evaluations must remain fast, accurate, and actionable. In this role, you will build the data flywheel that serves teams across Perplexity.ResponsibilitiesBuild the systems and pipelines that enable Search, Product, and other teams to independently access and utilize reliable eval verdicts without bottlenecksTake ownership of the "evals-to-product" loop, autonomously determining the best way to turn raw signals into durable datasets that power decision-making across the companyBuild a robust simulator pipeline capable of replaying user interactions with the product in formats legible to LLMs and VLMs, reflecting product changes as they are shippedMaintain data trust by implementing monitoring, lineage, and quality checks, ensuring downstream consumers can rely on the results implicitlyOperate in a small, high-impact team where your work directly shapes how Perplexity measures and improves Answer QualityQualifications3+ years of software engineering experience shipping production systemsStrong proficiency in Python and SQL with the ability to write production-grade, maintainable codeExperience with big data systems including distributed compute and large-scale storageSolid fundamentals in data modeling, system design, and debugging distributed systemsExperience with AWS and lakehouse ecosystems like Databricks or SparkComfortable with agentic coding workflows and using AI-assisted development tools to iterate fasterPreferred QualificationsData engineering background including pipelines, orchestration, and warehousing patternsFamiliarity with LLM/VLM interfaces, tokenization, structured formats, and multimodal payloadsExperience with evaluation platforms, experimentation systems, or machine learning infrastructurePrior work supporting customer-facing products at scale