Data Scientist

Astek Group; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

Astek Group in Singapore is seeking an experienced Mid to Senior Data Scientist to enhance fraud detection and risk analytics across public training grant schemes.

You will validate models, calibrate thresholds, monitor performance, and develop analytical solutions with Python and SQL, collaborating with data engineers and stakeholders.

The role requires applying feature engineering, backtesting, data drift analysis and building dashboards with Tableau or similar tools.

Qualifications

• Min 4 years of experience in data science, advanced analytics, fraud/risk modelling or model validation.
• Strong hands-on proficiency in Python and SQL for data analysis, transformation and model development.
• Experience developing, validating or enhancing predictive models, risk scoring or anomaly detection solutions.
• Strong understanding of feature engineering, backtesting, threshold calibration and model performance metrics.
• Experience working with large, complex datasets, including data quality assessment and data lineage.
• Ability to translate business requirements into analytical specifications and risk indicators.
• Exposure to Singapore public-sector projects or regulatory datasets is a plus.
• Experience handling imbalanced datasets, delayed outcome labels and production monitoring.

Responsibilities

• Review, validate and optimise fraud detection models, including methodology assessments, backtesting, threshold calibration and performance evaluation.
• Develop and enhance fraud-risk indicators, scoring models, analytical rules and features based on business requirements.
• Build and maintain technical dashboards to monitor model performance, including precision, recall, data drift, concept drift and alert thresholds.
• Analyse new grant schemes, eligibility criteria and claims processes to identify potential fraud risks and detection approaches.
• Perform exploratory data analysis, data validation, anomaly investigation and impact assessments using large-scale datasets.
• Collaborate with business stakeholders, data engineers and management to translate requirements into analytical solutions.
• Maintain reproducible analytical workflows, model documentation, validation reports and knowledge transfer materials.

Skills

Python

SQL

Fraud/Risk modelling

Model validation

Feature engineering

Data analysis

Education

Degree in Data Science, Statistics, Mathematics, Computer Science, Engineering, Economics or related quantitative discipline

Tools

Tableau

CI/CD

MLOps

Spark

PySpark

AWS Redshift

AWS Glue

Job description

ASTEK has been providing IT and Engineering solutions for some of the world’s largest industrial and services groups for more than 35 years with 10,000 passionate experts in 22 countries throughout Europe, APAC, Middle East and the Americas

Role Overview

We are seeking an experienced Mid to Senior Level Data Scientist to enhance and maintain fraud detection and risk analytics models. The role involves model validation, threshold optimisation, performance monitoring and developing analytical solutions to identify potential fraud risks across public training grant schemes.

Key Responsibilities

• Review, validate and optimise fraud detection models, including methodology assessments, backtesting, threshold calibration and performance evaluation.
• Develop and enhance fraud-risk indicators, scoring models, analytical rules and features based on business and operational requirements.
• Build and maintain technical dashboards to monitor model performance, including precision, recall, data drift, concept drift and alert thresholds.
• Analyse new grant schemes, eligibility criteria and claims processes to identify potential fraud risks and recommend appropriate detection approaches.
• Perform exploratory data analysis, data validation, anomaly investigation and impact assessments using large-scale datasets.
• Collaborate with business stakeholders, data engineers and management to translate requirements into analytical solutions.
• Maintain reproducible analytical workflows, model documentation, validation reports and knowledge transfer materials.

Requirements

• Degree in Data Science, Statistics, Mathematics, Computer Science, Engineering, Economics or a related quantitative discipline.
• Min 4 years of experience in data science, advanced analytics, fraud/risk modelling or model validation.
• Strong hands-on proficiency in Python and SQL for data analysis, transformation and model development.
• Experience developing, validating or enhancing predictive models, risk-scoring models, fraud detection or anomaly detection solutions.
• Strong understanding of feature engineering, backtesting, threshold calibration and model performance metrics, including precision and recall.
• Experience working with large, complex datasets, including data quality assessment, anomaly detection and data lineage.
• Ability to translate business requirements into analytical specifications, model logic and measurable risk indicators.
• Strong analytical, problem-solving, documentation and stakeholder communication skills.
• Exposure to workforce, training grants, claims, regulatory datasets or Singapore public-sector projects.
• Experience handling imbalanced datasets, delayed outcome labels and fraud/risk model monitoring.
• Knowledge of data drift, concept drift and production model performance monitoring.
• Experience with Tableau or equivalent dashboarding tools.
• Familiarity with CI/CD, MLOps and model deployment.
• Experience with Spark, PySpark, AWS Redshift and AWS Glue.
• Knowledge of graph/network analytics for identifying suspicious relationships or coordinated fraud patterns