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

what makes you a great fit

• you align with our principles

• you take full ownership of projects

• you want to work in-person in Berlin

• you know what it takes to succeed in a fast-paced, high-ambiguity environment

• you know how to prioritize high-leverage work

• you want to work with a smart and driven team with (self-reported) low ego

• you want to help build a multi-billion dollar company from the ground up

• strong portfolio showcasing your work on complex, user-centered products

• proficiency in modern design tools (Figma, etc.)

• experience designing for both web and mobile platforms

• (bonus) you speak German natively (our biggest customers are German-speaking)

you may not make a good fit if…

• you prefer a remote-first environment

• you like to work on your own with minimum collaboration

• you have no prior experience in software engineering teams

• you only want to work on visual design instead of the entire user experience

• you think AI is just "hype" and doesn't provide real value

• you want to work 9-5

perks

• above-market pay & equity

• access to any (AI) tool that makes you more productive

• gym subscription

• company trip to San Francisco in fall 2025