Data Scientist – Junior/Mid

Fourth

Data Scientist building data-driven solutions for Fourth's hospitality management platform. Collaborating with Data and ML Engineers on experiments and productionizing data science initiatives.

Posted 6/6/2026full-timeSofia • 🇧🇬 BulgariaJuniorWebsite

Tech Stack

Tools & technologies

PythonPyTorchScikit-LearnSparkSQL

About the role

Key responsibilities & impact

Build data-powered solutions forming part of our product
Define and execute data science experiments
Create PoC and move them to production with support from ML and Data Engineers
Conduct exploratory data analysis
Perform feature engineering
Engage in time series forecasting
Develop, deploy, and monitor models
Conduct A/B testing
Communicate findings and mine data for insights
Influence organisational strategies based on insights

Requirements

What you’ll need

Strong statistical and machine learning knowledge
Use AI tools for coding and strong coding skills (clean and commented code, version control, documentation)
Ability to develop high-performing end-to-end machine learning models (data processing, feature engineering, model training, scoring, monitoring)
Experience with feature engineering using Python, SQL or similar tools
Experience with machine learning using Python, Spark, PyTorch, scikit-learn or similar languages and libraries
Abilities to create powerful visualisations which to help communication of data science insights and results to business stakeholders
Juniors are welcome to apply - we value curiosity, a strong learning mindset and solid fundamentals over years of experience.

Benefits

Comp & perks

25+ days off, as well as birthday day off and 4 charity days off per year
Flexible start and end of the working day and hybrid working mode, including a combination remote and in the office
Team-centric atmosphere
Encouraging healthy lifestyle and work-life balance including supplemental health insurance
New parents bonus scheme

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

data sciencemachine learningstatistical analysisfeature engineeringtime series forecastingA/B testingdata processingmodel trainingmodel monitoringdata visualization

Soft Skills

communicationcuriositylearning mindsetinfluencing strategies