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Machine Learning Scientist - Matchmaking

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Breeze

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Location:
Netherlands , Rotterdam

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Category:
IT - Software Development

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Contract Type:
Employment contract

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Salary:

4500.00 - 8000.00 EUR / Month
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Job Description:

Breeze's matchmaking system is the heart of the product. It decides which users to suggest to each other, how many suggestions to show, and when. Your work directly affects whether people have a great date tonight. You'll work closely with Thomas Crul (Lead Matchmaking Engineer) and Yanna van der Vlugt (Product Manager), as part of a small team where ideas are challenged constructively and you learn from each other.

Job Responsibility:

  • Improve match predictions with ML/AI
  • Shape the matchmaking system design
  • Build and improve models (e.g. gradient-boosted trees, neural networks) that predict match probabilities
  • Improve the experimentation infrastructure, such as the feature store and model training pipeline
  • Validate improvements through A/B tests or backtesting
  • Contribute to how the system should work: which parameters to tune, how to balance competing dynamics, and what the profile suggestion logic should look like
  • Navigate tradeoffs like 'more suggestions means lower accept rate per suggestion' and 'optimising for likes vs matches vs retention'
  • Validate changes through A/B tests, geo-based tests or backtesting

Requirements:

  • Sharp analytical thinker
  • Strong in data and ML
  • Software engineer who leverages AI tools
  • User-centred thinker
  • Ownership mindset
  • Clear communicator
  • Mission-aligned
  • At least 1 year of full-time experience in data and/or ML
  • Skilled in Python and SQL
  • Comfortable with git, CLI tooling, and packaging and deploying code
  • Can ship code in Python and ideally Go
What we offer:
  • Visa and/or 30% ruling sponsorship when qualified
  • Transition to a permanent contract after 1 or 2 seven-month contracts
  • Option for share options post seven-month contracts
  • 5% pension contribution via a sustainable a.s.r. pension scheme
  • 25 paid vacation days and public holidays off
  • 8% yearly holiday allowance
  • Flexibility to work from the office or remotely two days a week
  • Option to work up to 1 month outside the Netherlands per year
  • Travel costs covered
  • High-end laptop, LLM/professional software subscriptions and/or an ergonomic workspace
  • Company fitness and access to a psychologist
  • Monthly team dinners/activities
  • Annual work trip abroad

Additional Information:

Job Posted:
March 24, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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