Bill Tai

Data scientist

Salary / Daily rate

St Albans, UK

Mobility: London

Freelance, open to permanent contract

Can come onsite

Skills

PythonData EngineeringMachine LearningData AnalysisCRM

Languages

English (Fluent)Chinese (Fluent)

About me

Intro

Technical Data Scientist with 10 years of experience in machine learning, predictive modelling, and advanced analytics. Strong expertise in designing and deploying models that directly impact marketing strategy. Adept at communicating complex analytical outcomes to stakeholders and ensuring that data-driven insights shape strategic decision-making.

Links

Work experience

Data Scientist

RS Group plc

Feb 2015 - Nov 2025

10 years 10 months

Hoyland, Barnsley S74, UK

– Lead end-to-end data science projects applying predictive modelling, clustering, and machine learning to optimize marketing and sales strategies. – Collaborate with senior stakeholders to translate business challenges into actionable analytical solutions. – Automate data workflows and partner with vendors to scale machine learning deployment across the business. – Communicate analytical findings to non-technical audiences, driving adoption of data-driven initiatives. – Built predictive models (Logistic Regression, CHAID) identifying high-value new customers with 70% accuracy (vs. 20% baseline). – Designed segmentation models uncovering customer clusters contributing ~90% of next quarter's revenue. – Delivered a personalized product recommendation engine using the FP-Growth algorithm, deployed on the company website. – Developed lookalike and churn prediction models, enabling proactive customer acquisition and retention. – Created a lead scoring framework that increased sales conversion rates. – Enhanced customer profiling accuracy through data enrichment models for missing industry attributes.

Analyst, Strategic planning

Hong Kong Tourism Board

Aug 2014 - Feb 2015

7 months

Hong Kong

– Analyzed tourism trends, market outlook, and visitor behavior to support strategic marketing decisions. – Delivered actionable insights that informed regional marketing campaigns and strategic planning.

Presales Consultant

ICO Limited

Oct 2013 - Aug 2014

11 months

Hong Kong SAR

– Technical Presales and software demonstrations

Data analyst

Collinson

Mar 2012 - Aug 2013

1 year 6 months

– Generated CRM and campaign performance reports for global loyalty programs. – Supported a major system migration project and provided analytical insights for a Japanese hotel alliance loyalty program.

Database Marketing Analyst

Reader's Digest

Aug 2008 - Dec 2011

3 years 5 months

Sydney NSW, Australia

– Conducted campaign segmentation and regression analyses to optimize targeting and ROI. – Automated campaign workflows, improving efficiency and reducing manual processing time.


Education

The Hong Kong University of Science and Technology

Science, Mathematics, Statistics

2005 - 2008

3 years 1 month


Licenses & certifications

Data Analyst in Python

Issued: –

Data Scientist in Python

Issued: –

SAS Certified Base Programmer for SAS 9

Issued: –

Certified by SAS

SAS Certified Advanced Programmer for SAS 9

Issued: –

Certified by SAS

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