Global tech recruitment & staffing for fast-growing companies
Data Scientist – Early Hire, Full Model Ownership, B2C SaaS
Location
Ukraine
Posted
5 days ago
Salary
0
Seniority
Senior
Job Description
Data Scientist – Early Hire, Full Model Ownership, B2C SaaS
OnHires
• Build, validate, and ship predictive models that drive the business: churn prediction, LTV forecasting, propensity and uplift modelling, and recommendation • Own end-to-end ML workflows: feature engineering, model development, evaluation, deployment, and monitoring • Monitor models in production and retrain or adjust them as the product and user base evolve • Explore where AI/ML creates real product value as the company expands into AI-powered products • Design and analyse experiments (A/B tests, uplift, causal inference), bringing rigour to how we measure impact and reduce variance • Help shape the experimentation framework and modelling standards as foundations for the wider team • Handle user-level data responsibly: privacy-aware feature engineering, avoiding leakage of sensitive attributes, and compliance with data-use policies • Partner with Data Engineers to productionise models with reliable feature pipelines and, where useful, a feature store • Translate model output into clear, actionable recommendations for Product, Growth, and leadership — tying work back to company goals
Job Requirements
- 3+ years building and deploying machine learning models in a production setting
- Strong Python and SQL, with solid command of the modern ML stack (scikit-learn, plus PyTorch or TensorFlow where relevant)
- Sound grounding in statistics and experiment design: significance, causal inference, and uplift or propensity modelling
- Hands-on experience with predictive use cases: churn, LTV, propensity, or recommendation
- Comfort owning a model end to end — from problem framing to production and measurement, not just notebooks
- The ability to turn complex analysis into a clear narrative and a recommendation a non-technical stakeholder can act on
- Curiosity and autonomy — comfortable in a fast-moving environment where the roadmap evolves quickly
Benefits
- Fully remote within the EU or Ukraine
- B2B contract
- 22 days of paid time off plus public holidays
- Flexible working hours within core EU/Eastern European business hours
- A rare chance to build a data function from scratch, with broad ownership and direct impact on the product roadmap
Related Guides
Related Categories
Related Job Pages
More Data Scientist Jobs
Senior Data Scientist, IT
Centene CorporationTransforming the health of the communities we serve, one person at a time.
• Designs and develops scalable solutions using AI tools and machine-learning models. • Performs research and testing to develop machine learning algorithms and predictive models. • Utilizes big data computation and storage tools to create prototypes and datasets. • Conducts model training and evaluation. • Integrates, tests, tunes, and monitors solutions. • Participates in model brainstorming conversations with new potential internal customers interested in AI/ML capabilities. • Works alongside internal customers that are requesting AI/ML capabilities to understand overall business objective & impact. • Analyzes use cases of ML algorithms and apply findings to enable business decisions. • Writing moderately complex SQL and Python/R code to extract data from various databases and data sources. • Explores and visualizes data to gain an understanding and verify data quality. • Conduct exploratory data analysis from complex data sources and build key data sets to support operational analysis. • Builds ML/AI models using common methods within R and Python. • Analyzes ML algorithms that could solve a problem and ranks them by success probability. • Analyzes errors of the model and designs strategies to overcome them. • Develop logging, alerting, and mitigation strategies for handling model errors. • Develop AI/ML models to distinguish relevant content or events and recognize patterns. • Designs and develops AI/ML models to predict member outcomes. • Evaluate and design experiments to monitor key model metrics and identify improvement opportunities. • Participate in presentations and communicate research analysis results to non-technical business partners. • Produces fairness review for each model to ensure it's free of bias. • Set up CI/CD pipelines used for model automation. • Model deployment with containers such as Kubernetes and Docker. • Produces clean & readable code that has been properly unit tested and optimized.
Role Description Join one of the UK Government’s largest digital data transformation programmes, helping to centralise Local Authority Land Charge registers into a single Land Registry system. We’re looking for a Data Coordinator to own the relationship with an assigned group of Local Authorities. You’ll guide Local Authorities through the transformation process, lead the analysis of large datasets, and ensure successful data migration. You’ll manage tasks, track progress, and contribute to improving our processes and tools. - Own the relationship with your assigned Local Authorities - Analyse and manage large datasets (100k+ records) - Guide Local Authorities through data transformation - Write and document transformation rules - Quality check and cleanse data - Track progress and manage stakeholder tasks - Contribute to process improvements and team support Qualifications - Exceptional stakeholder management and ability to communicate confidently across all levels internally and externally - Advanced Excel skills, including complex functions and data manipulation - Customer-facing experience, with a professional and approachable communication style - Strong analytical and problem-solving abilities, with a keen eye for data quality - Experience managing data and coordinating processes across multiple workstreams - Working knowledge of SQL or FME (desirable) - Experience with GIS tools and spatial data (highly desirable)
Director, Data Science
KyndrylWe design, build, manage and modernize the mission-critical technology systems that the world depends on every day.
• Define and execute data science strategy aligned to business objectives and KPIs • Lead and mentor data scientists and analysts • Drive workforce transformation and modernization initiatives aligned with business strategy and operating model evolution • Establish modeling, analytics, and governance best practices • Design KPI frameworks for WF optimization, utilization, NPS, revenue and other operational metrics • Build and scale Power BI dashboards and reporting ecosystems • Deliver agentic AI solutions to automate workflows • Translate complex analytics into business insights for executives
• Own ML models end to end - frame the problem, write the design/RFC, build and train the model, ship it to a served endpoint and monitor its quality in production. • Build your model's training pipeline and package it for serving, deploying onto the shared platform Data Engineering builds and operates. • Own model quality, not the platform - you watch drift and performance and decide when to retrain. • Evaluate rigorously - experimental design, statistical validation, drift detection and retraining, champion-challenger evaluation and promotion. • Partner across the org - your model outputs feed the attributes/enrichment layer, payments risk, dashboards and client integrations, you'll collaborate with Data Engineering, backend, product and QA on contracts, deployment and rollout. • Move fast with AI-assisted development - we use it to accelerate implementation and experimentation, the highest-leverage contribution in this role comes from strong problem framing, system design, evaluation rigor and clear technical specifications.




