ZoomInfo is where careers accelerate. We move fast, think boldly, and empower you to do the best work of your life. You’ll be surrounded by teammates who care deeply, challenge each other, and celebrate wins. With tools that amplify your impact and a culture that backs your ambition, you won’t just contribute. You’ll make things happen–fast.Overview The R&D Engineer is a researcher-practitioner – someone equally comfortable reading papers and shipping prototypes. They are responsible for staying close to the frontier of LLM and AI systems research, identifying ideas with practical value, and building POCs that demonstrate feasibility. These POCs are demoed to the team and, where validated, handed off to the Platform and AI Engineers to productionize. This person does not work in isolation – they collaborate closely with the rest of the team throughout the research-to-product pipeline.What You’ll DoMonitor and synthesize developments in LLM systems, AI infrastructure, and adjacent research areasPrototype and evaluate novel ideas with a fast feedback loop – build, demo, iterateExtend and improve the existing agent and RAG SDKs with new retrieval strategies, agent patterns, and provider integrationsEvaluate new embedding models, reranking approaches, and retrieval architectures against the existing pipelineCollaborate with the Platform and AI Engineers to hand off validated POCsProduce clear documentation and demos that make research accessible to non-researchersContribute to discussions with the tech lead on long-term research direction and where to place technical betsEngage with the broader research community – conferences, papers, open‑source projectsIdentify opportunities where emerging techniques can address real problems surfaced by the AI EngineerWhat You BringHands‑on experience building or evaluating LLM systems – fine‑tuning, inference, retrieval, or agentsFamiliarity with RAG architectures beyond naive vector search – HyDE, MMR, graph‑based retrieval, reranking, or hybrid searchExposure to agent frameworks and multi‑agent orchestration patterns (PydanticAI, LangGraph, AutoGen, CrewAI, or similar)Demonstrated ability to move quickly from idea to working prototypeA portfolio of explored ideas – published work, technical blog posts, side projects, or OSS contributionsStrong communication skills – can explain complex research to non‑researchers clearlyCollaborative by default; understands that research value is realized when ideas shipCore:Python, agent frameworks (PydanticAI or equivalent), RAG pipeline design (embedding, retrieval, reranking), managed ML platforms (Vertex AI or equivalent)Nice to have:Systems‑level programming experience, familiarity with inference infrastructure (vLLM, TensorRT), experience with RLHF or fine‑tuning pipelines, MCP protocol, graph databases (Neo4j)ZoomInfo is proud to be an equal opportunity employer, hiring based on qualifications, merit, and business needs, and does not discriminate based on protected status. We welcome all applicants and are committed to providing equal employment opportunities regardless of sex, race, age, color, national origin, sexual orientation, gender identity, marital status, disability status, religion, protected military or veteran status, medical condition, or any other characteristic protected by applicable law. We also consider qualified candidates with criminal histories in accordance with legal requirements.For Massachusetts Applicants: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability. ZoomInfo does not administer lie detector tests to applicants in any location.#J-18808-Ljbffr