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Hayley McCafferty

Hayley McCafferty

Data Engineer

N/A

Technologies

My Portfolio Highlights

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

DataCamp Course Completion

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

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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