Principal Applied Scientist

Posting TypeRemote/HybridJob OverviewWHO WE ARERelativity is a leading legal data intelligence company building technology that helps users organize data, discover the truth, and act on it with confidence. Our AI-powered, cloud platform, RelativityOne, transforms massive volumes of complex information into actionable insights for litigation, investigations, regulatory inquiries, data breach responses, and other high‑stakes legal work where accuracy, trust, and defensibility are essential.Relativity aiR is redefining document review through agentic AI systems that reason, cite their decisions, and scale across millions of documents. These systems automate complex legal workflows while keeping humans in the loop, enabling legal professionals to focus on what matters most.What We DoAt Relativity, we are building a world‑class Applied Science organization focused on pushing the boundaries of intelligent systems in one of the most demanding and consequential domains: the legal system.Applied Science TeamThe Applied Science team sits at the core of Relativity’s AI development. We are responsible for designing, validating, and operating the intelligent systems behind Relativity aiR. Our work goes far beyond simple model integrations. We build agentic systems that reason over documents, validate decisions statistically, remain auditable and defensible, and operate reliably at massive scale. Trust, reliability, and responsibility are foundational to everything we build.Our team values curiosity, experimentation, rigor, and collaboration. We move quickly, validate assumptions with evidence, and simplify aggressively to deliver systems that are safe, reliable, and impactful in production.Job Description And RequirementsABOUT THE ROLEAs a Principal Applied Scientist, Reliability, you will lead the design and validation of intelligent systems that customers can trust in high‑stakes legal workflows. You will operate end‑to‑end: understanding the problem space, designing solutions, validating them statistically, and bringing them to production in partnership with engineering, product, and customer‑facing teams.This role is ideal for an experienced applied scientist who thrives at the intersection of modeling, experimentation, and real‑world system reliability, and who is motivated by building AI systems that are not only powerful, but also defensible, interpretable, and safe by design.What You’ll DoWrite production‑quality code that solves real customer problems and scales cleanly, with systems designed to be easy to ship, operate, and maintainCollaborate closely with fellow Applied Scientists as well as Engineers, Product Managers, Designers, and CustomersDesign and execute statistically sound experiments and automate them into reusable benchmarks and evaluation frameworksRapidly prototype AI‑ and ML‑powered solutions and mature them into reliable, scalable production modelsSelect the appropriate modeling approach for each problem, ranging from classical machine learning techniques to frontier large language modelsValidate model behavior rigorously using evidence, metrics, and experimentation, remaining open to changing course when the data demands itContribute to building intelligent systems that reason, cite their decisions, and operate defensibly at scaleHelp push the boundaries of agentic AI while ensuring systems remain auditable, reliable, and responsibleWhat We’re Looking For8+ years of professional experience in applied science, machine learning, or a closely related fieldMaster’s or Ph.D. in Computer Science, Statistics, Applied Mathematics, or a related quantitative discipline, or equivalent professional experienceProven ability to move quickly from prototype to production, simplifying complex ideas into robust systemsExperience reading, validating, and applying research with a healthy level of skepticismExperience across a wide range of modeling techniques, from classical machine learning to large‑scale generative modelsFamiliarity with modern MLOps tooling and practices, including containers, workflow orchestration, deployment patterns, telemetry, and experimentation systemsStrong Python programming skills and experience with common data and ML libraries such as numpy, PyTorch, scikit‑learn, and PySparkStrong communication skills, with the ability to explain complex technical concepts clearly to both technical and non‑technical audiencesEnd‑to‑end ownership mindset, with the ability to understand new problem spaces, design solutions, and bring them to market alongside engineering, product, and support partnersA collaborative, curious, and adaptable approach, with comfort leading, questioning assumptions, and learning from failureWHY WE COULD BE A GREAT FITHigh‑Impact ProblemsWork on intelligent systems that operate in one of the most high‑stakes domains, where trust, reliability, and defensibility truly matter.Agentic AI at ScaleBuild and extend AI systems that reason across millions of documents, cite their decisions, and automate complex legal workflows.Scientific Rigor and Real‑World ImpactApply deep experimentation and statistical validation to systems that ship to real customers and influence real outcomes.Leadership and GrowthLead technically while continuously learning in a thoughtful, supportive, and intellectually rich Applied Science organization.Collaborative CultureJoin a team that values kindness, curiosity, technical excellence, and shared ownership of outcomes.Compensation And BenefitsCompetitive compensation, health and retirement programs, discretionary time off (DTO), parental leave for primary and secondary caregivers, company‑wide breaks, wellness resources, and an equity program.Relativity is committed to competitive, fair, and equitable compensation practices.This position is eligible for total compensation which includes a competitive base salary, an annual performance bonus, and long-term incentives.The expected salary range for this role is between following values:$224,000 and $336,000The final offered salary will be based on several factors, including but not limited to the candidate's depth of experience, skill set, qualifications, and internal pay equity. Hiring at the top end of the range would not be typical, to allow for future meaningful salary growth in this position.Required SkillsAlgorithms, Data Analysis, Machine Learning (ML), Natural Language, Python (Programming Language), Reinforcement Learning, Researching, Scientific Writing, Statistical Models, Technical Leadership