Martin Efuk
London,United Kingdom
Overview
5
5
years of professional experience
1
1
Certification
Work history
Data Scientist
eBay
12.2024 - Current
- Regulatory Impact Analysis: Designed and executed SQL-based cohort studies and A/B tests to evaluate seller behavior before and after regulatory changes, driving a 15% increase in compliance rates and quantifying business trade-offs.
- Compliance Tracking: Built structured data pipelines and automated workflows to monitor compliance rates, GMV at risk, and regulatory hold outcomes, improving reporting accuracy across multiple markets.
- Policy → KPI & Monitoring: Translated legal policy into operational KPIs (shipment compliance, risk thresholds, repeat-offence windows) and embedded real-time monitoring/alerts, cutting time-to-flag from days to hours.
Data Analyst
TikTok
01.2022 - 12.2025
- Data Analysis: Analyzed large datasets with SQL and Python to uncover consumer insights, boosting user engagement by 25% and conversion rates by 20%.
- Data Migration: Executed Project Clover, ensuring seamless data transition and integration using SQL, minimizing downtime, and validating data quality.
- Risk Detection: Built a machine learning model to detect risky e-commerce accounts, reducing spam by 30% and cultivating a healthier ecosystem.
- Data Visualization: Developed prototype solutions, including reports and interactive dashboards, to transform complex datasets into visually intuitive formats, improving business data literacy.
Software Engineer
Atos
01.2021 - 01.2022
- Data Pipeline Development : Designed and implemented data pipelines using Python and SQL , facilitating efficient data collection, processing, and analysis.
- E-commerce Platform Integration : Enhanced online sales capabilities by integrating payment gateways and inventory management systems with Python and SQL .
- A/B Testing Implementation : Designed and implemented an A/B testing framework using Python to optimize feature rollouts. Reduced regression testing time by 50% and improved software release cycles.
- Cloud-Based Machine Learning Features : Developed and deployed machine learning features on Google Cloud Platform (GCP) using Python and TensorFlow , enhancing product functionality and user experience.
- Performance Optimization : Conducted in-depth performance analysis and optimization of critical applications with Python and SQL , resulting in a 12% increase in application efficiency and user satisfaction.
Education
Msc - Advanced Computer Science
University of Leeds
Leeds09.2020
Bsc - Computer Science
Leeds Beckett University
Leeds09.2019
Skills
Programming Languages: Python, SQL, R
Data Visualization: Tableau, Power BI, D3js
Database: MySQL, PostgreSQL, MongoDB
Machine Learning: Scikit-learn, TensorFlow, Keras
Certification
Google Certified: Associate Cloud Engineer | Google Certified: Professional Data Engineer
Timeline
Data Scientist
eBay
12.2024 - Current
Data Analyst
TikTok
01.2022 - 12.2025
Software Engineer
Atos
01.2021 - 01.2022
Msc - Advanced Computer Science
University of Leeds
Bsc - Computer Science
Leeds Beckett University