Jack & Jill
Data Scientist at Harmonic Security Inc.
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Job Title
Data Scientist
Salary
Not Disclosed
Company Description
VC-backed AI security startup funded by Ten Eleven Ventures and In-Q-Tel
Job Description
You will be a critical member of the product delivery team, laying the groundwork for secure Generative AI adoption in the enterprise. You'll design curated datasets, build detection models for sensitive data, and iterate based on real-world customer feedback to ensure teams can use AI tools safely and confidently.
Location
London, UK
Why this role is remarkable
- Work at the forefront of AI security with a team led by cybersecurity experts and backed by top-tier investors like Ten Eleven Ventures and In-Q-Tel.
- Direct impact on a category-defining product that enables safe enterprise adoption of LLMs by protecting sensitive data in real-time.
- Join an AI-first culture where you are encouraged to use and build with the latest tools like Claude Code and Cursor to automate workflows.
What You Will Do
- Design and curate comprehensive datasets tailored for training and fine-tuning sensitive data detection models.
- Develop, validate, and ship production-ready NLP models that categorize and protect enterprise data at scale.
- Drive continuous model improvement by analyzing performance dashboards and incorporating direct feedback from customer interactions.
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The ideal candidate
- Proven track record of shipping production-grade models and managing high-quality datasets within a live SaaS product environment.
- Expert-level Python skills with deep knowledge of NLP techniques, classification approaches, and data categorization taxonomies.
- A product-driven mindset that prioritizes incremental delivery and thrives in a fast-paced, innovative startup atmosphere.
Who are Jack & Jill?
- 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.
- 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.
Get help with your application
Your very own career expert that helps elevate your application to the next level.
How does this work?
- Jack is 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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