Founding Designer

At telli, we're building the first AI-native phone system.

Since launching last year at Y Combinator, we've grown >$2M in annualized revenue with a team of only 12 people.

Today, most B2C companies fail in their customer communication not because they don't care, but because they can't keep up. The sheer volume of calls forces them to outsource to poor-quality external call centers or have their internal teams spend hours on repetitive calls.

With telli, our customers now rely on AI voice agents that handle their repetitive calls, freeing human agents to focus on what matters - talking to customers when it counts. The result: higher efficiency, happier teams, and better customer experiences.

We've seen firsthand that legacy phone systems are not designed for an AI-first world. That is why we are building the first AI-native phone system that lets B2C companies manage both their human and AI teams on one platform.

Our founding team knows this problem inside-out, having managed a 150-person call center before. We know how painful and expensive scaling phone operations can be for companies.

There is a lot of work ahead. The opportunity is massive. We are ending an era of poor-quality external call centers.

This is a high-ownership role for a founding 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.

• 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

• build prototypes and test product hypothesis with customers

• 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

• 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/Tailwind) to production

• you don't just express designs in Figma, but also feel comfortable with tools like v0, Lovable, Cursor, etc. to build usable prototypes

• you're 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

• 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

• you prefer a remote-first environment

• you like to work on your own with minimum collaboration

• you have no prior experience working with 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

• above-market pay & equity

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

• gym subscription