Data Scientist

Winnow

Data Scientist enhancing the confidence and accuracy of AI models at Winnow, a company focused on reducing food waste with innovative technology.

Posted 7/13/2026full-timeCluj-Napoca • 🇷🇴 RomaniaMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates strong analytical and numerical skills to enhance AI model performance through data analysis and insights. Proficient in SQL and Python, with experience in data visualization and AWS, while effectively communicating findings to diverse audiences.

Highest-signal resume keywords

SQLPythonData AnalysisAWSData Visualization

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Data AnalysisSQLPythonData VisualizationComplex QueriesKey Performance IndicatorsMachine Learning ApproachesMacrosFormulasPostgreSQL

Soft Skills

Effective CommunicationAttention to DetailProactive ThinkingFacilitating Group DiscussionsAction Oriented

Tools & Technologies

AWSGrafanaJupyterHubClaude

Industry Keywords

Data ProcessesUser ExperienceLarge Data SetsInsights PresentationCost Optimization

Tech Stack

Tools & technologies

AWSGrafanaPostgresPythonSQL

About the role

Key responsibilities & impact

Use your data skills to enhance the confidence and accuracy for our AI models
Developing and refining complex queries and reports to help other team members execute their roles
Performing ongoing data analysis to present back insights to clients
Shape our data processes to optimize efficiency while reducing costs
Imagine and deliver insightful analysis aiming at improving our user experience
Monitor and manage the existing fleet of models in the field, and ensure new clients benefit from AI no less than 1 month after installation
Produce and track key performance indicators
Take on more complex data analysis problems

Requirements

What you’ll need

Excellent numerical and analytical skills
Strong knowledge in SQL and Python required and willingness to learn more
Experience handling large data sets
Experience visualising large datasets
Experience with AWS
Experience using Claude to simplify and streamline tasks
Comfortable using macros and formulas such as vlookups, sumifs, and pivot tables
Experience with Grafana, JupyterHub, postgreSQL is a plus
A willingness to learn and suggest machine learning approaches to solving data problems
Effective verbal and written communication skills
Ability to turn data into insights and present these insights effectively
Ability to adapt communication style to suit different audiences
Ability to facilitate group discussions
Attention to detail. Ability to develop accurate written materials
Action oriented. Ability to follow-up on feedback to ensure positive outcomes
Comfortable training others to develop data skills
Pro-active and critical thinker
Ability to think out of the box and not afraid to speak up
Ability to create new processes from scratch
Ability to influence others to follow best practices
Flexible and willing to take on new challenges as they emerge

Benefits

Comp & perks

Competitive base salary
Meal tickets - 40 RON per working day
2 Wellness hours per month plus a 274 RON gross monthly wellness allowance or the option to swap the wellness allowance for a 7Card subscription
25 days of paid vacation time in addition to national holidays, plus the option to buy a further 5 days annual leave
Company part-funded private health insurance and eye care allowance
Life insurance (3 times base salary)
Company stock options package
Eligible for discretionary annual bonus
Employee Assistance Programme - 24/7 helpline for your wellbeing
Learning and development allowance of 1,730 RON annually
Hybrid way of working - we’re all in the office on Wednesdays and Thursdays
Company provided breakfast & snacks on office days
Early Finish Fridays - log off at 3 PM on a Friday if you have completed your tasks by then
Our own office space with a great working environment
You will love what you do – waking up every day solving one of the biggest social problems of our generation - food waste
Committed team members with broad experience who share a common passion to build a world class business