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Hayley McCafferty

Hayley McCafferty

Data Engineer

N/A

Technologies

My Portfolio Highlights

My New Track

Associate Data Engineer

My New Track

Associate Data Engineer

Analytical virtuoso, transforming data noise into harmonious insights.

My Work

Take a look at my latest work.

project

Analyzing Students' Mental Health

SQL
project

Exploring London's Travel Network

SQL
github

Grocery Pipeline

PythonSQLGit
project

Analyzing Students' Mental Health

SQL

DataCamp Course Completion

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

Courses

Introduction to Python
Introduction to SQL
Intermediate SQL
Joining Data in SQL

My Work Experience

Where I've interned and worked during my career.

Telstra Health UK | Dec 2017 - Jul 2021

Junior Data Engineer

- Built on Data Administrator responsibilities (SQL data processing, documentation in Confluence, ISO 27001 data governance, supporting analytics with SQL views) while taking on expanded deployment and automation duties - Deployed processed data to multiple environments using Octopus Deploy, ensuring accurate and timely availability of data across systems - Manually executed and monitored data pipelines built with RabbitMQ and Jenkins, supported reliable and scalable data workflows - Wrote and maintained automation scripts using PowerShell and Git, streamlining release processes and reducing manual effort - Partnered with the data engineering team to optimise workflows and improve delivery times, strengthening overall data operations and reliability - Continued to be recognised for efficiency and process improvement, driving smoother integrations between data engineering and downstream analytics teams - Used Jira for task tracking and team communication
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Telstra Health UK | Dec 2016 - Dec 2017

Data Administrator

- Entered and managed data for ETL and other data processes using SQL, ensuring accuracy and efficiency in data workflows - Ran ETL processes and monitored data pipelines, ensuring timely and accurate data delivery - Created SQL views to support the analytics team, enabling faster insights and improving reporting capabilities - Authored and maintained process documentation in Confluence, standardising data engineering practices and supporting knowledge sharing across teams - Maintained the Data Asset Register in alignment with ISO 27001 compliance requirements, strengthening data governance and security posture - Provided ETL process updates to stakeholders, informing teams where each part of the process had reached and ensuring transparency and smooth collaboration - Received a company award in the first year for efficiency and process improvements, recognised for driving higher data quality and operational performance - Collaborated closely with the data engineering team, gaining hands-on experience with enterprise data management practices and compliance-driven environments

StoreFeeder | Jan 2016 - Dec 2016

Web Developer / 2nd Line Support

- Diagnosed and resolved customer-reported bugs on a C#-based web platform using SQL queries, debugging tools, and code fixes, reducing repeat issues by 20% and improving user satisfaction - Collaborated with senior developers to enhance the e-commerce web application (HTML, CSS, JavaScript, SQL, C#, ASP.NET), implementing new features that boosted user engagement by 15% and contributed to increased sales - Delivered 2nd line technical support, achieving an average resolution time 25% faster than SLA targets, minimising downtime for customers - Leveraged SQL for database troubleshooting, performance optimisation and root cause analysis, accelerating bug resolution and improving platform stability - Actively sought mentorship from senior developers, improving proficiency in C#, SQL, and full-stack development best practices - Stayed up to date with modern web development frameworks and database management practices, ensuring long-term scalability and reliability of the platform

Boots UK | Oct 2013 - Jan 2016

Technical Analyst

- Maintained and administered SharePoint Online tenant, ensuring 99.9% uptime and seamless user experience - Developed custom SharePoint Apps and automated back-end scripts, reducing manual maintenance effort by 30% - Provided on-call support for critical incidents, minimising downtime and improving business continuity - Led Root Cause Analysis (RCA) to resolve recurring technical issues, cutting repeat incidents by 25% - Acted as the primary liaison between the Nottingham office and the offshore team in India, improving cross-team collaboration - Contributed to increased efficiency, productivity, and system reliability across the organisation through proactive monitoring and optimisation

My Education

Take a look at my formal education

Bachelor of Science - BS, Computer ScienceUniversity of Stirling | 2012

About Me

Hayley McCafferty

Developing Data Engineer looking to expand skills to earn experience in the multi changing world of technology

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