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Senior Data Scientist

Data ScientistData ScientistFull TimeRemoteSeniorTeam 201-500Since 2014H1B No SponsorCompany SiteLinkedIn

Location

Spain

Posted

72 days ago

Salary

0

Seniority

Senior

Bachelor Degree3 yrs expEnglishAWSBigQueryNumPyPandasPython

Job Description

Senior Data Scientist

Bark.com

• Design, develop and refine machine learning models ranging from linear and logistic regression through to tree-based methods, ensemble approaches and advanced algorithms • Develop proof of concepts and translate exploratory insights into structured modelling approaches • Design and execute statistical offline simulations to validate modelling approaches prior to live experimentation • Plan, implement and analyse controlled A/B tests, ensuring statistical robustness and clear interpretation of results • Define success metrics aligned to business objectives and ensure appropriate evaluation frameworks are in place • Analyse model performance using appropriate metrics such as precision, recall, ROC-AUC, log loss, calibration measures and model-specific metrics • Identify potential sources of bias, data leakage and experimental confounding, and proactively mitigate associated risks • Work closely with Product, Engineering and other stakeholders to prioritise opportunities and ensure models deliver measurable value • Communicate complex modelling concepts, trade-offs and experimental results in a clear and accessible way to both technical and non-technical audiences • Contribute to raising the overall standard of modelling practices within the team

Job Requirements

  • 3 to 4 years of experience building, evaluating and iterating on machine learning models using large and complex data sets
  • Strong academic background in Statistics, Mathematics, Computer Science or a related quantitative discipline
  • Deep understanding of statistics, machine learning and experimental design principles
  • Demonstrated experience running A/B tests, designing offline validation strategies and interpreting experimental outcomes
  • Strong grasp of model evaluation metrics and the ability to select appropriate performance measures based on business context
  • Strong programming skills in Python with experience using libraries such as NumPy, Pandas and related tools for data manipulation and analysis
  • Experience working with cloud-based data infrastructure such as BigQuery and AWS services including S3 and SageMaker
  • Experience using Jupyter notebooks for exploratory analysis, modelling and communicating findings
  • Ability to move comfortably between high level problem framing and detailed quantitative analysis
  • Strong product orientation with experience collaborating closely with cross-functional teams
  • Excellent written and verbal communication skills, with the ability to explain technical concepts clearly and confidently.

Benefits

  • 25 days of paid holiday, with extra days added at 3 and 5 years of service.
  • Fully remote working, plus up to 20 days each year to work from anywhere in the world.
  • Cobee Wellbeing platform with flexible benefits: meal vouchers, travel vouchers, gym memberships, private medical etc..
  • A €250 allowance towards essential home office technology to help you stay connected and productive.

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