Success Engineer

at telli — AI phone agents that convert

BerlinFull-timeAny (new grads ok)YC-F24

What the role involves

about us

Every 10 minutes, 18 million conversations happen between businesses and consumers around the world.

For decades, the consumer side of those conversations sucked: long queues, robotic menus, repeated explanations, and advice that is often unhelpful. Most people today still cannot simply say what their problem is in natural language when communicating with businesses.

AI changes that. For the first time, companies can have natural conversations with customers at massive scale. Every B2C company - from energy providers to telcos to insurers - will use AI agents to talk to their customers. The number of conversations businesses will handle is going to explode in the coming years.

At telli, we are solving the challenges that come with that shift. Today, leading B2C companies like Sky are already using telli to deploy thousands of voice agents to provide their customers with a new experience. But building a first voice agent is easy, getting it to drive real outcomes for customers and businesses is the hard part. telli helps companies build, deploy, and improve consumer-facing AI voice agents at scale. This will become one of the most important software categories of the next decade, and we intend to win it.

We are a small, AI-pilled team that likes to solve hard problems. Be it engineering, product, or GTM - we build, experiment, and move fast, while heavily leveraging the capabilities of AI models. All of us like to challenge ourselves and take real ownership over what we do, all while still staying humble and keeping a low-ego culture.

Check out our principles to see how we work.

about the role

As Success Engineer you own the long-term success of a portfolio of telli customers. You are the trusted counterpart customers turn to after go-live to drive deep AI adoption, retention, and expansion as telli scales.

Once deployment brings a customer live, you take over. You monitor agent performance, optimise prompts and flows, surface and close usage gaps, find new use cases, and engineer the conditions for retention and expansion.

You also build the playbooks that make adoption and optimisation repeatable across the customer base.

You own a portfolio of accounts and targets on NRR, logo retention, and usage, sharing the ARR expansion target with the account manager. You work alongside product, engineering, sales and account management as telli scales to €10M ARR by end of 2026.

what you'll do

  • Account Ownership & Commercial Success

Become the central contact for helping our customers adopt telli across the organization

Lead workshops and training sessions to drive deeper product adoption

Help onboard new units and use cases

Work together with the account manager to identify expansion opportunities & stay on top of renewal cycles

Track product usage and product adoption to identify blockers and opportunities

  • Agent Development & Deployment

Partner directly with engineering and customers to build, design, and refine AI agents that handle thousands of customer conversations daily

Track agent performance against key success criteria and continuously improve

Debug technical problems across integrations, agent performance, and call quality

Act as first point of contact for all customer requests and technical issues in your customer portfolio

  • Systems & Product Feedback

Build and maintain workflows for tracking adoption, success metrics, and customer health

Document playbooks, best practices, and internal processes to scale the success function

Continuously improve internal and external knowledge bases

Translate customer needs into product feedback for engineering and product teams

what makes you a great fit

You have >2 yr experience in technical customer-facing roles: you've supported customers in technical environments like SaaS support, technical account management, solutions engineering, implementation, or consulting

You're a confident communicator who builds trust: you can explain tech

About telli

telli is building AI voice agents that convert leads into sales opportunities for B2C companies. For example, a leading home-buying platform is using telli to fully automate their pre-qualification. We are serving customers in energy, real estate, medical products, and home services. You might think that these B2C companies want to do more self-serve and less outreach. But the truth is outbound calls are what really drive conversion. Historically, managing these calls has been complex and expensive—costing companies hundreds of thousands of dollars. With telli, for the first time, B2C companies can automate the role of a pre-sales agent, end to end.

Full telli profile

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