Senior Product Engineer (Full-stack)

Overview 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.

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 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

Benefits 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

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.

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

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 100s 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

#J-18808-Ljbffr