Mark H. Email & Phone Number

Dublin, Ie

Dublin, County Dublin, Ireland

• Developed a GraphQL microservice query endpoint to retrieve Cosmos DB record counts, reducing average response time from 3s to <1s (67% improvement), significantly enhancing data access efficiency and meeting critical consumer needs.• Engineered a scalable Python solution for processing large-scale XML files (100,000+ rows) into JSON format, utilizing memory-efficient streaming techniques, expanding data sources for analysis.• Implemented token caching and retry logic with Karate framework, reducing smoke test failures in GitHub Actions by 86% (from 21/week to 3/week), significantly improving CI/CD pipeline stability.• Facilitated a graduate bootcamp, leading 5 hands-on training sessions for 15 new graduates on APIs, Git, Docker, Kubernetes, and Go, increasing team skillset.• Refactored JMeter test plans with request per second timer for 10 GraphQL API microservices, enabling precise load control and facilitating accurate performance analysis under varying traffic conditions.• Contributed to 3 distinct Scrum teams across multiple projects, leveraging Agile methodologies to enhance cross-functional collaboration, consistently meeting sprint goals and improving stakeholder satisfaction.

Dublin, County Dublin, Ireland

• Analyzed COVID-19 vaccination data for 10,000,000+ members using SQL, identifying and resolving critical data issues to improve accuracy.• Successfully resolved 200+ IT issues using ServiceNow, applying strong problem-solving and analytical skills.• Regularly collaborated with customer support teams to resolve vaccination record issues, providing data-driven solutions.