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Data Scientist
Location
Portugal
Posted
101 days ago
Salary
0
Seniority
Senior
Job Description
Data Scientist
Klar
• Design, build, and optimize Machine Learning models powering origination, behavioral scoring, limit management, and early-warning systems • Leverage alternative data sources including transaction behavior, merchant data, and device intelligence to improve predictive performance • Evaluate and implement the infrastructure required to deploy, monitor, and retrain models at scale • Explore the applications of novel architectures (transformers, foundational models, etc.) for credit risk and related tasks • Collaborate with cross-functional teams to identify opportunities for data-driven insights and solutions • Work with other members of the Credit Risk team to build credit policies across the full customer lifecycle: origination, limit management, restructuring, and write-offs • A lot of autonomy and ownership: you will own at least one Machine Learning model end-to-end • Communicate findings and insights to technical and non-technical stakeholders
Job Requirements
- Master's degree or above in Data Science, Computer Science, Statistics, Mathematics, or a related field
- 5+ years of experience in Data Science, Machine Learning, or a related field
- Strong proficiency in Python and SQL
- Experience with Machine Learning libraries such as Scikit-Learn, XGBoost, TensorFlow, Keras, and Pytorch
- Experience owning models or analytical systems end to end, including performance monitoring, retraining, documentation, and stakeholder alignment
- Comfort using AI coding assistants, such as Claude Code and Codex, to improve productivity
- Proficiency in data analysis, visualization, and manipulation tools such as Pandas, Matplotlib, and Seaborn
- Optional, but a plus: Experience with credit risk, fraud, underwriting, lending, financial services, or another regulated decisioning domain
- Experience with dbt (Data Build Tool) to transform SQL data
- Experience working with novel, transformer-based architectures
- Strong problem-solving skills and the ability to think creatively
- Ability to communicate model tradeoffs, risk implications, and business impact to technical and non-technical stakeholders
Benefits
- Competitive salary based on performance and experience
- Chance of earning Klar stock options
- 26 days of paid vacation per year
- Computer device
- International work environment with amazing and highly skilled people
- A world class team that helps you evolve your skills in areas you're interested in
- Wellhub subscription to offer mental and physical health
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