Senior Product Engineer (full-stack)

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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 hundreds 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 interfaces
• Build scalable, intuitive UIs and robust APIs to power complex enterprise workflows
• Develop infrastructure to support thousands of LLM applications, handling millions of documents and hundreds of user requests per second
• Collaborate with Product, Design, and Backend teams to shape the user experience
• Contribute to and evolve our design system for consistency and usability
• Ensure quality through strong testing, monitoring, and CI/CD practices
• Occasionally handle urgent “firefighting” and customer-facing production issues
• Mentor teammates and foster cross‑functional engineering best practices

Requirements

• 5+ years of professional experience as a Full Stack Engineer (or similar)
• Solid knowledge of REST APIs, SQL databases, CI/CD, Kubernetes, and cloud services
• Skilled at building reusable UI components and scalable backend systems
• Proactive, collaborative, and comfortable taking ownership in fast‑paced settings
• Strong product mindset and experience with talking to users & stakeholders

Nice to have

• Experience in early‑stage or high‑growth startups
• Familiarity with open‑source development
• Background in NLP, machine learning, or LLM technologies
• Previous experience building or scaling B2B SaaS products
• Experience evolving design systems or contributing to OSS projects
• Remote‑first setup with flexible hours & tech of your choice
• 30 days vacation + extra days for family sick leave
• Competitive salary & stock options for every team member
• Monthly sports & mental health support allowance with Oliva
• Annual learning & development budget
• Monthly team socials & in‑person meetups
• Dog‑friendly Berlin HQ

About us

Founded 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)