As Founding Engineer, you will architect an AI companion that replaces swiping with deep conversational coaching. You'll build sophisticated backend systems and voice processing pipelines to analyze emotional biomarkers, transforming how people find and maintain relationships. This is a high-ownership role shaping the technical foundation of a product disrupting the €8B dating industry.
Back to all jobs
Find a job withJack
This job is no longer actively hiring. Open Roles to see active jobs.
Berlin, Germany€90k + 10% Equity
Founding Engineer at cherrish.one - AI-driven relationship platform
Dating apps are broken by design, profiting from loneliness rather than love. Cherrish is fixing this by building a conversational AI companion that guides users from first dates to long-term relationship success. As Founding Engineer, you will architect a sophisticated voice-first platform that uses acoustic biomarkers to understand human emotion. With a 10-15% equity stake and a mission to disrupt an €8B market, you'll join a Grace Berlin Accelerator alum to build the future of human connection. If you have 5+ years of experience in AI agents or voice tech, this is your chance to lead a technical revolution in the heart of Berlin.
Overview
Role overview
Company
cherrish.one
Social Networking
cherrish.one - AI-driven relationship platform
Responsibilities
What you will do
- Architect and own the entire AI backend, including LLM orchestration, conversation state management, and vector-based semantic matching systems.
- Develop advanced audio processing pipelines to extract psychological signals and emotional biomarkers from user voice recordings beyond simple transcription.
- Collaborate directly with the founder to translate complex relationship psychology into scalable technical features for a live, growing user base.
Candidate profile
Who this is a fit for
- 5+ years of engineering experience with a proven track record of shipping AI agent or voice-AI systems in production environments.
- Deep expertise in LLM orchestration and product-focused AI development, ideally within emotionally complex domains like mental health or coaching.
- Startup-ready mindset with the ability to own technical strategy end-to-end and make high-level product decisions alongside the founding team.
What makes it remarkable
Why this role is remarkable
- Massive equity stake (up to 15%) in a mission-driven startup poised to disrupt the exploitative dating app business model.
- Work with a founder deeply embedded in the European ecosystem and supported by the Grace Berlin Accelerator ahead of a 2026 seed round.
- Pioneer the use of acoustic voice biomarkers and emotional AI to create a relationship "board member" that supports couples long-term.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
Jack