Senior Data Scientist - Build & Deploy ML Models (Remote)

IDT Corporation; Województwo mazowieckie; Hybrid; PLN 591,000 - 748,000; Full time

Benefits offered by this job

Remote/hybrid work

Long-term growth

Competitive salary

Training & conferences

English classes

Referral program

Job summary

IDT Corporation is expanding its AI Lab and seeking a hands-on Senior Data Scientist to design, build, and deploy ML models from scratch for fraud prevention, payment risk, and personalization. You will own the full modeling lifecycle from problem framing to production monitoring and continuous improvement.

The role requires 5+ years of hands-on DS/ML experience, strong Python and DL skills, and fluency in English to collaborate with an international team.

Qualifications

• 5+ years hands-on Data Science / ML experience, building/new models from scratch and delivering to production with measurable impact.
• Fluent English (B2+) written and spoken for technical discussions with an international team.
• Deep understanding of statistics, probability, validation methodologies; handling class imbalance, calibration and anomaly detection.

Responsibilities

• Design and build new models from ground up for anti-fraud, risk assessment and personalization; maintain rigorous validation to prevent leakage.
• Partner with Data Engineering and MLOps to operationalize models in production (batch and real-time); build training, experiment tracking, and drift monitoring pipelines.
• Design A/B tests and statistical evaluations to measure model performance against business metrics (fraud reduction, acceptance rates, latency).
• Explore emerging techniques (LLMs/GenAI, graph-based methods) and establish engineering best practices; mentor team members.

Skills

ML from scratch

Production deployment

English proficiency

Experiment design

Cross-functional collaboration

Education

Bachelor's degree in quantitative field

Tools

Python (Scikit-learn, Pandas, NumPy)

PyTorch

TensorFlow

SQL

MLflow

ClearML

Job description

IDT Corporation is expanding its AI Lab and seeking a hands-on Senior Data Scientist to design, build, and deploy ML models from scratch for fraud prevention, payment risk, and personalization. You will own the full modeling lifecycle from problem framing to production monitoring and continuous improvement.

The role requires 5+ years of hands-on DS/ML experience, strong Python and DL skills, and fluency in English to collaborate with an international team.