AI Product Engineer

Location: Berlin

Department: Engineering

Location Type: IN_OFFICE

Employment Type: FULL_TIME

Intro

The role

The day-to-day

• Design, build, and iterate on full-stack features using our tech stack (Frontend: Vite, Typescript, React, and Tailwind; Backend: Python with FastAPI, and SQLAlchemy; Infra: AWS), integrating LLMs to solve core user problems while optimizing for performance, reliability, and security.
• Work closely with founders and customers to deeply understand user challenges and ensure our product effectively addresses their needs.
• Take full ownership of features from design through deployment and iteration, including contributing to stack maintenance, improving reliability, scalability, and managing/removing technical debt.
• Actively collaborate with colleagues through code reviews, design discussions, knowledge sharing, and presenting your work in demos to foster learning and gather feedback.
• Proactively identify opportunities for improvements – whether in the product, technical stack, or team processes – and take initiative to address them.

You should apply if you

• Are a skilled full-stack engineer with 3+ years of professional experience writing maintainable code and familiarity with common API patterns (e.g., REST). Note: We always make exceptions to this rule for exceptional engineering talent!
• Have demonstrated that you can successfully translate complex ideas into working prototypes and shipping robust, real-world applications, particularly in secure or data-intensive domains.
• Are an excellent communicator (written and verbal English) who thrives on deep collaboration, including code reviews and asynchronous design discussions.
• Are a hard worker with a strong sense of urgency, who thrives in a fast-moving, high-responsibility environment where direct communication is the norm and speed matters as much as quality.
• Are motivated by ownership, love to work in a fast-paced early-stage startup environment, are genuinely excited by our mission, and actively seek to improve yourself, your colleagues, and the team culture.
• Have impressive achievements from previous careers and from side projects — we’re excited to hear about these!

Nice to have

• Practical experience building applications leveraging LLMs (e.g., using frameworks like LangChain or LlamaIndex) and with prompt engineering.
• Experience with evals for LLM applications.
• Experience with, or a strong interest in, UX/UI design principles.
• Previous experience founding a company or working in an early-stage startup.
• Good understanding of German (as the initial product is in German).