Senior Data Scientist - Machine Learning | Relocation Offered

Catawiki; Lisboa; Presencial; EUR 70 000 - 95 000; Tempo integral

Resumo da oferta

Catawiki is seeking a Senior Machine Learning Data Scientist to join the Data Team. You will deliver scalable data products, build production models, and partner with product and engineering to implement ML solutions. The role emphasizes practical ML deployment, real-time predictions, and close collaboration across disciplines.

You will work on large-scale data, explore opportunities, and drive value through robust data-driven insights and models that enhance user experience and platform safety.

Qualificações

• 5+ years of data science experience with ML in production.
• Strong Python and SQL skills for data manipulation and modeling.
• Experience deploying models at scale and delivering real-time predictions.
• Solid background in statistics and quantitative analysis.

Responsabilidades

• Build production-ready ML models and data products for the platform.
• Explore data to identify opportunities and deliver actionable insights.
• Collaborate with product, dev, UX, and analysts to scope value.
• Deploy scalable models on cloud infrastructure using Kubernetes.
• Deliver real-time, asynchronous, and batch predictions.

Conhecimentos

Python

SQL

Machine Learning

Statistics

Data Products

Deployment

Real-time inference

Ferramentas

PyTorch/TensorFlow

Docker

Kubernetes

Google BigQuery

MySQL

Spark

Airflow

Kafka

nginx

CI/CD

Descrição da oferta de emprego

About Catawiki

Catawiki was founded in 2008. It was originally designed as a website where collectors could manage and keep track of their collections online. Visitors can still add new items to the existing catalogue of collectibles. Unsurprisingly, the name Catawiki is a combination of the words 'catalogue' and 'wiki'. In 2011, Catawiki began hosting weekly auctions in various categories, including art, antiques, classic cars, watches, jewellery, fashion, books, and stamps.

Position

Our Data story

With ten-thousands of active items on auction every day, hundred-thousands of bids, millions of users, and billions of events, the Catawiki platform generates vast amounts of data. We collect this data centrally, using it to generate business insights, as well as powering machine learning models that enhance our user experience, optimize our workflows, and keep our platform safe. We believe in creating flexible models that can be applied to a variety of use cases, and in experimentation and iteration to hit the ground running and continually improve the tools we build.The Data Team, which covers the full data spectrum of Machine Learning, Analysis and Data Engineering, has a clear a mission within Catawiki:

• Why: We believe that by using data in a smart way, we can build the best Catawiki possible. We want to have impact and see opportunities everywhere.
• How: We are builders, thinkers and talkers. We collaborate closely with every department to create value for our customers. We think big and hold ourselves to high standards, because our work really matters for the future of the company.
• What: As a resultwe create business value by delivering scalable, robust models and actionable insights and predictions. We help the company to find opportunities and understand success, and we empower everyone to use data to be successful.

So what's the job

As a Senior Machine Learning Data Scientist in the Data Team at Catawiki, you will focus on delivering scalable and impactful data products. You'll work closely with our product and development teams while implementing your work. This includes:

• Building production-ready models that apply machine learning and advanced data science techniques within our product offering by writing robust and scalable code.
• Finding data science opportunities by exploring our extensive mobile and web data, and applying machine learning and advanced statistics to tackle these real-world business problems.
• Being pragmatic when needed but also able to go deep into a problem, applying your expert knowledge of machine learning techniques
• Working with cross-disciplinary teams involving product owners, developers, UX designers, and business analysts in identifying improvements and new use cases for ML
• Deploy scalable models using Kubernetes on cloud infrastructure, producing real-time, asynchronous, and batch predictions

Your qualification

• You are an all-around data scientist with 5+ years of experience who is as comfortable diving into the internals of a model implementation as discussing new opportunities for ML with product stakeholders
• Can use your broad skill set to solve challenging ML problems and have a high throughput.
• Are familiar with a range of different ML techniques and use that to select a good solution for their projects.
• Are able to consider the operating/deployment constraints of large models and implement solutions accordingly
• Give guidance and unblock others in your team by supporting them with advice and new techniques.
• Have a strong quantitative background (statistics, ML, sciences, etc.)
• Are fluent in Python and capable with SQL
• Have deployed ML models serving real-time responses on a large scale
• Have demonstrable experience in building robust data products that created value for the company you worked for

Will be a plus

• Proven ability to extract meaning from very big datasets with little engineering support
• Experience with one or more of the following: PyTorch/Tensorflow, LightFM, Git, Docker, Kubernetes, Google BigQuery, MySQL, Spark, Airflow, Kafka, nginx, CI/CD
• An entrepreneurial mindset that enables you to get things done, even if that requires actions outside your own area or comfort zone