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Dean Griffiths

Dean Griffiths

Certified

Lead Developer

Barclays | London

Technologies

My Portfolio Highlights

My New Certification

Data Engineer

My New Certification

Python Data Associate

My New Certification

SQL Associate

My New Certification

Data Engineer

Experienced Python / SQL / SAS Developer

My Work

Take a look at my latest work.

track

Data Manipulation

Python
course

Reshaping Data with pandas

Python
course

Data Structures and Algorithms in Python

Python
track

Data Manipulation

Python

My Certifications

These are the industry credentials that I’ve earned.

SQL Associate

SQL Associate

Python Data Associate

Python Data Associate

Data Analyst Associate

Data Analyst Associate

Data Engineer Associate

Data Engineer Associate

Data Engineer

Data Engineer

Other Certificates

SAS SAS 9 Basic Certification

SAS SAS 9 Advanced Certification

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

Courses

Introduction to Python
Introduction to SQL
Introduction to Power BI
Intermediate SQL

My Work Experience

Where I've interned and worked during my career.

Accenture | Mar 2025 - Jun 2025

Data Engineer

In my role at Accenture, I focused on migrating and syncing data processes to a new server, ensuring seamless operations and data accuracy. I worked closely with teams to prevent conflicts within interconnected systems, documented successful syncs and conducted root cause analysis to identify data discrepancies
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Barclays | Dec 2012 - Apr 2024

Lead Developer

In my role as Lead Developer at Barclays, I collaborated with subject matter experts to implement model updates and automate complex models for accuracy and alignment with evolving business requirements. I developed end- to-end solutions for model implementation, benchmarking, database building, and unit testing. By streamlining processes through automation techniques, I achieved significant time and space savings while analysing large datasets to improve data handling efficiency and reduce process run times.

Barclaycard | Feb 2009 - Dec 2012

Automation Engineer

In my role as an Automation Engineer at Barclaycard in London, I focused on designing and implementing automated workflows for operational processes. By reducing manual workload through automation, I improved efficiency and accuracy. Additionally, I rebuilt a marketing filter application to enhance usability and prevent overwriting key scripts, optimizing workflow for the team.

Barclaycard | Oct 2006 - Feb 2009

Data Analyst

In my role as a Customer Targeting Data Analyst at Barclaycard in London, I executed targeted marketing campaigns using data-driven insights to enhance customer engagement. I revamped processes to minimize the need for extensive rewriting and transformed a previously delayed marketing campaign into a streamlined process that consistently met deadlines.

Experian | Feb 2004 - Oct 2006

Data Analyst

In my role as a Data Analyst at Experian in Nottingham, England, I specialized in producing tailored client datasets by analyzing and interpreting extensive internal databases. I also handled client data cleaning to prepare customer address files for data matching. Additionally, I successfully absorbed a former colleague's entire portfolio of work into mine, showcasing my ability to adapt and excel in a fast-paced environment.

My Education

Take a look at my formal education

Bachelor of Science - BS, MathematicsLoughborough University | 2002

About Me

Dean Griffiths

Developer with 20 years experience in Python, SQL and SAS building, automating and optimising workflows and reporting systems, delivering reliable, efficient solutions at scale. Strong in coding, data transformation and integration.

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