Senior Product Engineer (full-stack)

TL;DR We’re hiring a Senior Full Stack Engineer to build and scale the deepset AI Platform, our enterprise-grade product for LLM-powered applications. You’ll work across the stack—designing clean, intuitive interfaces and building reliable backend systems that process millions of documents and 100s of user requests per second. Ideal for someone who enjoys owning features end to end, thrives at the intersection of frontend and backend, and wants to shape how enterprises adopt real-world AI. Why deepset At deepset, we’re on a mission to make custom AI solutions accessible to every organization. With Haystack, thousands of developers build advanced LLM applications every day, while our enterprise-ready AI Platform helps companies turn large language models into business value. We’re remote-first, flexible, and built on a culture of trust and ownership. You’ll collaborate with top-tier tech talent, tackle meaningful challenges, and help transform complex AI into solutions that are simple, powerful, and ready for the real world. What you will do Own features end to end—from backend services to frontend interfacesBuild scalable, intuitive UIs and robust APIs to power complex enterprise workflowsDevelop infrastructure to support thousands of LLM applications, handling millions of documents and 100s of user requests per secondCollaborate with Product, Design, and Backend teams to shape the user experienceContribute to and evolve our design system for consistency and usabilityEnsure quality through strong testing, monitoring, and CI/CD practicesOccasionally handle urgent “firefighting” and customer-facing production issuesMentor teammates and foster cross-functional engineering best practices Requirements 5+ years of professional experience as a Full Stack Engineer (or similar)Strong proficiency in JavaScript/TypeScript, React, and backend development (Python)Solid knowledge of REST APIs, SQL databases, CI/CD, Kubernetes, and cloud servicesSkilled at building reusable UI components and scalable backend systemsProactive, collaborative, and comfortable taking ownership in fast-paced settingsStrong product mindset and experience with talking to users & stakeholders Nice to have Experience in early-stage or high-growth startupsFamiliarity with open-source developmentBackground in NLP, machine learning, or LLM technologiesPrevious experience building or scaling B2B SaaS productsExperience evolving design systems or contributing to OSS projects Benefits Remote-first setup with flexible hours & tech of your choice30 days vacation + extra days for family sick leaveCompetitive salary & stock options for every team memberMonthly sports & mental health support allowance with OlivaAnnual learning & development budgetMonthly team socials & in-person meetupsDog-friendly Berlin HQ About usFounded in 2018, deepset builds open and enterprise-grade tools that help teams build AI with purpose. From Haystack, our open-source framework, to the deepset AI Platform, we give developers and organizations the building blocks to solve complex, high impact challenges with AI – with full control, transparency, and sovereignty. Backed by GV and Balderton, we’re growing the world’s production AI community and customer base solving challenges too critical to get wrong. Visit us to learn more: deepset Website | Haystack Website | GitHub | Linkedin | X deepset (Twitter) | X haystack (Twitter)