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Job Description

As part of Adevinta’s central teams, the Trust and Connecting area offers expertise and solutions for solving user and business problems about trust & transactions, to help our millions of customers trade safely online every day.


Within Trust and Connecting, Serenity team plays a key role in helping us achieve our ‘most trusted’ goal as they are building the global fraud detection and moderation component that will cater to our marketplaces globally. Serenity has had a very successful launch; it’s deployed in 6 countries and is utilising the latest machine learning techniques to provide a safer experience for over 12 million customers in the last 6 months alone. We have many interesting challenges on the horizon and need outstanding team players to join us as we scale. This position is located in Paris 10th, within Leboncoin’s office; part of the Adevinta family. Our team is distributed in Paris, Vienna and Barcelona.



  • Develop highly scalable classifiers and tools leveraging machine learning, regression, heuristics, and rules-based models.

  • Code deliverables in tandem with the engineering team using the best development practices and tools.

  • Adapt standard machine learning methods to best exploit our production environment. 

  • Share best development practices within the organisation (i.e. code reviews, testing, etc).

  • Continuously monitor the quality of our models and design measurements to monitor their performance.

  • Keep up to date on the latest and greatest developments in the data science field.

  • Troubleshoot issues in production when things go wrong.


  • You have professional experience with one or more of the following: NLP, pattern recognition, data mining, anomaly detection, time series predictions, fraud detection or deep learning.

  • Experience with delivering models from data exploration to production and the required technologies.

  • Experience with systems software or algorithms.

  • Knowledge of python.

  • Strong analytical / problem solving skills.

  • Experience with modern software development and systems tools like Git, Travis or similar.

  • Excellent verbal and written communication skills.

Additional Information

What you'll get from us: 

  • Opportunity to shape the way we work. Your feedback and opinions are valued at all levels of the organisation

  • Benefits including private health insurance, stock purchase plan and bonus

  • Flexibility to work when and how you want - flexible hours, autonomy to set your own agenda, choice of phone and computer

  • Smart Working Policy - work remotely some of the time, balanced with time in the office together with your team - between 5 and 45 days per quarter in the office

  • ‘Work from anywhere’ weeks - up to four weeks working from anywhere, as long as you have an internet connection!

  • Career development, including language classes and Adevinta Academies: specialised content built by our experts on Machine Learning, Agile, Leadership and more

  • Lunch tickets

  • 25 days of holiday + 10/12 extra paid holidays called RTT

  • Summer bonus (=1% of base salary, paid in July)


Adevinta is an equal opportunity employer and we value diversity. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status or disability status. 

If anything you’ve read above ticks your boxes, then why not apply now to find out more!


Company Description

We’re Adevinta, a global leader in digital marketplaces. Our household name brands, including marktplaats in The Netherlands, Mobile.de in Germany and leboncoin in France, reach hundreds of millions of people every month. 

We’re all about matchmaking, and our sites help people find whatever they’re looking for in their local communities – whether it’s a car, an apartment, a sofa or a new job. Every connection made or item found makes a difference by creating a world where people share more and waste less. 

Our brands are supported by global Tech Hubs in Barcelona, Amsterdam, Paris and Berlin. Their goal is to develop common global products and innovation platforms which all of our brands can use. This means using cutting edge technology to create highly scalable, customisable and secure products and components that free up development time and leverage our access to global data.


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