Jack & Jill
Founding Full-Stack Engineer (+ Founding Equity) at Kensai Technologies
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Job Title
Founding Full-Stack Engineer
Salary
Not Disclosed + Founding Equity
Company Description
Kensai Technologies is a Zurich-based health and wellness intelligence platform founded by a former Palantir market entry lead and a venture-backed longevity clinic founder. They are building an AI-native engine to transform unstructured regulatory data—from hostile government portals and complex certifications—into structured, trustworthy intelligence for the world’s largest health brands and retailers.
Job Description
As a Founding Full-Stack Engineer at Kensai Technologies, you will lead the 0→1 development of our intelligence engine. You'll architect global Postgres schemas, build scrapers for hostile regulatory data, and integrate LLM reasoning layers. This role is perfect for a builder who craves high autonomy and wants to solve massive data challenges in the health sector.
Location
Zurich, Switzerland or Remote
Why this role is remarkable
- Exceptional founding team including a 3x scale-up operator from Palantir/P&G and a medical doctor who founded Switzerland's first venture-backed longevity clinic.
- True 0→1 ownership with founding equity, offering significant stakeholder influence and the chance to architect a global intelligence platform from day one.
- High-impact mission solving critical compliance and data challenges for the world's largest health brands using cutting-edge, AI-native development workflows.
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What You Will Do
- Build sophisticated scrapers and pipelines to extract and structure data from hostile sources like locked PDFs and complex government portals.
- Design and scale a global, multi-country Postgres schema and robust infrastructure on AWS or GCP for high-quality data delivery.
- Implement AI plumbing by connecting raw data to LLM reasoning layers to produce reliable, high-trust output for regulated product intelligence.
The ideal candidate
- At least 4 years of experience building complex APIs and systems from scratch, ideally as a founder or early-stage startup employee.
- Pragmatic full-stack capabilities with a backend focus, proficient in React, and experienced in using AI-assisted development to accelerate shipping velocity.
- Obsessed with data quality and web scraping, with a deep understanding of how to integrate LLMs into production-grade data pipelines.
Who are Jack & Jill?
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.
Get help with your application
Your very own career expert that helps elevate your application to the next level.
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.
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.
We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
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