ttelli is hiringProduct Designer

TYPEFull Time CATEGORYProduct Design LOCATIONBerlin Germany

This job post is over 2 months oldand may no longer be available.

about us

At telli we are building AI voice agents that are reshaping an entire industry.

Since launching 8-months ago, we raised a $3.6M pre-seed round from Cherry and Y Combinator and grew to >$1M in ARR. We are looking for a team members who want to go all-in to help us achieve the next milestone: $10M in ARR.

Two of our co-founders Finn and Philipp previously scaled the heat pump unit of energy unicorn Enpal from 0-150 people. They've seen the ins and outs of scaling phone-based customer processes. These businesses are rushing to deploy AI voice agents. However, creating a demo is easy — building reliable agents that handle millions of calls in production is incredibly hard.

In a world where intelligence becomes a commodity, it is up to us builders to craft new product experiences that let people harness the power of AI.

But building AI voice agents comes with challenges:

What is the most intuitive way for humans to build and adjust their own AI agents?
How do you build agents that work reliably across millions of calls in a world of non-determinism?
How do you ensure that customers can use the latest foundational models without having to understand the technical trade-offs?
How do you enable companies to build hybrid teams of human and AI agents?
What does human-computer interaction look like if, instead of having UI elements, you have a hyper-intelligent sidekick?

These are unsolved problems. Problems that haven't existed since the invention of computers. Solutions that worked in a pre-LLM world won't work today. Nobody knows how to solve these problems; it's up to us to figure it out.

We’re a small, fully in-person team based in Berlin. Even though most people have told us to build this company in SF because of “better talent” - we know there is amazing talent in Europe. We believe you can build a multi-billion dollar software company in Europe, and there is no better time to do this than now.

about the role

This is a high-ownership role for a founding product designer who cares about velocity and solving real customer problems. You won't just create mockups, you will own the entire design process end-to-end, speaking directly to customers and making core product and UX decisions. In short, you’ll have a significant impact on the direction of our high-growth, ambitious product.

You'll be our first full-time designer — with ownership over UX and UI across the entire product. This means you need to be comfortable designing for complex, AI-first workflows while maintaining the simplicity that makes our product accessible to non-technical users.

what you will do

work closely with our customers, understand their problems, and design product experiences that solve their challenges
own the end-to-end design process for features that process and analyze thousands of AI phone calls a day
create intuitive interfaces that make sense in an AI-first world where traditional UI patterns don't apply
collaborate directly with engineers to ship high-quality features quickly
lead user research projects across the company

your profile

you have worked as a product designer, ideally in an early-stage company
you love speaking to customers directly to identify pain points and problems
you have owned the development of product features, ideally in B2B
you feel comfortable shipping frontend changes (React) to production
consider yourself a high-agency generalist who can work across the entire product
you have a deep interest in AI and large language models and are excited about the unique design challenges of voice AI interfaces
have thrived in high-ambiguity environments: resolving uncertainty, embracing failure, and crystallizing what matters
care about building reliable, production-ready experiences (not just demos), but aren’t afraid to dive immediately into a problem and prototype without needing too much input