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Michael Byrne

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Ireland

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work
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school
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Résumé

Jobs verified_user 0% verified
  • PostHog
    Lead Software Engineer
    PostHog
    Oct 2023 - Jan 2026 (2 years 4 months)
    Designed backend services using Python (FastAPI) for workflow automation and internal tooling features.Built background processing pipelines to handle asynchronous tasks, improving system responsiveness during peak usage by ~25%.Integrated AI-powered summarisation using Python services to orchestrate LLM API calls and manage retries, logging, and cost monitoring.Refactored service boundaries to improve maintainability and reduce regression-related issues across releases.Implemented structured logging and monitoring, reducing incident investigation time significantly.
  • LetsGetChecked
    Senior Software Engineer
    LetsGetChecked
    Apr 2021 - Sep 2023 (2 years 6 months)
    Developed Python-based backend services handling regulated healthcare data for ~20k+ monthly users.Built asynchronous reporting and notification workflows using queue-driven processing.Optimised PostgreSQL queries and introduced caching strategies, reducing slow endpoint complaints by ~30%.Implemented AI summarisation workflows in Python, reducing average case review time by ~20–30%.Improved observability and incident response through structured logging and metrics tracking.
  • O
    Senior Software Engineer
    Optis
    Jan 2020 - Mar 2021 (1 year 3 months)
    Developed backend services using Laravel and Python-based automation scripts for merchant event processing.Built webhook handling and billing workflows supporting 800+ merchants.Managed AWS infrastructure and production deployments.Reduced recurring support issues by improving logging, retry logic, and monitoring around webhook failures.
  • Transfermate
    Senior Software Engineer
    Transfermate
    Mar 2018 - Dec 2019 (1 year 10 months)
    Built backend services for transaction workflows using Python for reporting, reconciliation scripts, and data integrity validation.Implemented idempotent payment handling and audit logging to prevent duplicate financial operations.Introduced caching and indexing improvements that stabilised API performance during peak traffic.Strengthened CI/CD and containerisation workflows to support rapid release cycles.
  • A
    Full-Stack Engineer
    Arekibo
    Sep 2016 - Feb 2018 (1 year 6 months)
    Built client-facing web applications using React and Node.js while also developing Python-based automation scripts for reporting and data transformation tasks.Designed REST APIs supporting booking and e-commerce workflows for multiple small-to-mid-sized clients.Wrote Python scripts for data migration, CSV processing, and integration testing during client onboarding phases.Improved frontend performance and backend query efficiency, reducing repeated bug cycles and client support escalations.Participated in technical scoping discussions and translated business requirements into maintainable backend solutions.
  • D
    Junior Software Engineer
    Doyle Shipping Group
    Jul 2013 - Aug 2016 (3 years 2 months)
    Developed internal tracking dashboards and automation scripts.Wrote Python scripts for CSV processing and reporting automation.Reduced manual operational work by several hours per week through automation.Improved SQL query performance, reducing report generation time from ~20 minutes to under 5 minutes.
Education verified_user 0% verified
  • University College Cork
    MSc Computing Science
    University College Cork
    Sep 2016 - Sep 2017 (1 year 1 month)
  • University College Cork
    BSc Computer Science
    University College Cork
    Sep 2009 - Jun 2013 (3 years 10 months)