Senior Fullstack Engineer, Solve

About the Role Join us at Zendesk, where we build AI‑powered products to deliver exceptional customer service. We’re looking for a Senior Fullstack Engineer to help build Solve – an AI‑powered conversation engine that resolves customer issues across channels. You’ll deliver end‑to‑end features that span LLM integrations, RAG retrieval, workflow orchestration, and polished front‑end experiences.

Responsibilities Extend the multi‑turn conversation engine: manage intent routing, context preservation, streaming responses, and human handoff across channel integrations. Build and optimize the RAG pipeline: embeddings, semantic retrieval, hybrid ranking, and evidence‑based answer construction to reduce hallucinations. Architect and implement the visual workflow/prompt builder experience (React) for designing branching conversational flows and tool integrations.

Integrate with LLM providers through a unified abstraction layer and build specialized prompt strategies for tasks such as clarification and validation. Create data visualization and analytics surfaces to help customers monitor intent performance and AI impact. Maintain high quality via testing, observability, and performance improvements across frontend and backend.

Qualifications Basic qualifications 3+ years professional full‑stack engineering experience with production ownership. Proficiency with Python backend frameworks (FastAPI recommended) and React/TypeScript frontends. Experience with search, caching, and message/event streaming technologies.

Preferred qualifications Previous experience with LLM providers (OpenAI, Google GenAI, etc.) and prompt engineering. Experience designing visual flow editors (React Flow or similar) and rich text editors. Familiarity with embedding stores and retrieval pipelines at scale.

Prior work on multi‑tenant SaaS and real‑time streaming systems. Compensation US annualized base salary range: $145,000 – $217,000. The offer will be based on experience, location, and other factors.

Equal Employment Opportunity Zendesk is an equal opportunity employer. We consider applicants without regard to race, color, religion, national origin, age, sex, gender identity or expression, sexual orientation, marital status, medical condition, ancestry, disability, military or veteran status, or any other characteristic protected by law. We are an AA/EEO/Veterans/Disabled employer.

If you are based in the United States and would like more information about your EEO rights under the law, please consult the U.S. Equal Employment Opportunity website. Reasonable Accommodations Zendesk endeavors to make reasonable accommodations for applicants with disabilities and disabled veterans pursuant to applicable federal and state law.

If you require a reasonable accommodation to submit this application, complete pre‑employment testing, or otherwise participate in the selection process, please send an e‑mail to [email protected] with your specific accommodation request. #J-18808-Ljbffr