Machine Learning Internship, Zürich (Kreis 11)

About Rapidata Rapidata offers an API to humans that is revolutionizing the data generation and annotation industry. It delivers highly scalable and extremely fast human data that fuels the AI systems of the future. We have a diverse user base of over 10 million active users from all walks of life. Naturally, this means different people are good at different things. To optimize both efficiency and quality of responses, we need to assign the right tasks to the right person in real time, at global scale.

The Role We're looking to hire a

Machine Learning Intern , a Master/Graduate student with experience in machine learning, reinforcement learning or data science and a strong interest in

recommender systems . You'll become an integral part of a dynamic and highly skilled team. It's not an isolated research project, your task is to outperform the current system, not just offline but also online with strict ( You'll work independently on a primary task while closely supported by senior engineers and ML practitioners. If things go well, we'd very much like to promote and keep you afterwards.

Responsibilities

Researching state of the art recommender systems

Defining evaluation metrics

Working with large-scale human data

Show improvements in offline as well as online experiments

Collaborating with senior engineers and ML leads on production systems

Work independently on a primary task, with occasional side-quests

Requirements

Experience in machine learning, reinforcement learning or sequential decision-making projects (coursework or practical)

Solid statistical and mathematical foundation

Intrinsic drive&motivation

Excellent English communication skills, both oral and written

Strong Python skills

Ability to work in Zürich

Work authorization: Swiss or EU citizenship or enrollment in a degree program where the internship is a mandatory part of the curriculum.

Nice-to-Have

Experience in working with databases (Postgres, MongoDB, ClickHouse)

Experience in utilising coding assistance tools like Claude Code

Experience in C# or Rust

What We Offer

Competitive salary and equity in a startup with strong growth, IP and backed by top-tier VCs

Opportunity to join a fast growing startup early, giving you an outsized opportunity to shape where the company goes

Fun and open (startup) culture

Spacious mountain views office located in Zürich Center near Sihlcity (3 min from Binz Train station). Large Terrace with Tabletennis, Pizza Oven, Hammock and a BBQ

Flexible working times

Unlimited snacks and drinks of your choice

Potential full-time employment after the internship

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