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Michael J. Giarlo

PROFILE

Michael J. Giarlo

Michael Giarlo engineered robust features and reliability improvements for the sul-dlss/hungry-hungry-hippo and sul-dlss/purl-fetcher repositories, focusing on maintainable code, developer experience, and data integrity. He modularized core services, refactored API integrations, and automated CI/CD pipelines using Ruby, JavaScript, and Jenkins. Michael enhanced system stability by upgrading database environments, enforcing metadata validation, and improving error handling. His work included UI/UX refinements, security hardening, and test automation with RSpec and Selenium, resulting in faster iteration and reduced operational risk. Through careful dependency management and configuration updates, he ensured seamless deployments and reliable inter-service communication across evolving technical requirements.

Overall Statistics

Feature vs Bugs

83%Features

Repository Contributions

142Total
Bugs
12
Commits
142
Features
58
Lines of code
16,317
Activity Months11

Work History

October 2025

1 Commits

Oct 1, 2025

October 2025 monthly summary for sul-dlss/purl-fetcher: Focused on data quality and stability through descriptive metadata validation enforcement and a dependency upgrade. Delivered a targeted bug fix to enforce validation of descriptive metadata values, preventing invalid data from being stored. The change is anchored to commit 1ee6f496b7291b1f318f79ca4c6eac66d8e2410b (Bump to latest cocina-models version). Impact: improved metadata integrity, reduced downstream errors, and alignment with upstream validation capabilities. Technologies/skills demonstrated: dependency management, data validation integration, validation patterns, and traceability across repos.

August 2025

3 Commits • 1 Features

Aug 1, 2025

Monthly performance summary for 2025-08 focusing on sul-dlss/purl-fetcher. Delivered targeted reliability and data integrity improvements through precise, small-scale changes: - ETD Datacite Resource Type Mapping Support: Upgraded cocina-models from 0.105.0 to 0.105.1 to enable Datacite resource type mapping for ETD workflows (restricted to Gemfile.lock dependency). Commit: 4bca180d47e1e826596476d0f3903908a2e3e6bd. - Test Isolation Enhancement for Publish Collection Request: Fixed flaky tests by adding a cleanup after block to ensure stacks root directory is cleaned between runs. Commit: 1c9b6ff1b2eb1516bec35dabdaa392062e7115a9. - Prevent Duplicate DOIs in Public XML: Hardened logic to check for existing DOI identifiers and update or create DOIs as needed to avoid duplicates. Commit: 5f018dad90df96f52cded6533ed9263759506417.

July 2025

2 Commits • 1 Features

Jul 1, 2025

July 2025 monthly summary for sul-dlss/hungry-hungry-hippo focused on UI polish and deployment workflow stabilization. Key changes were implemented to improve UI consistency for repeatable components and to reduce risk from unintended deployments during work cycles. The work reflects frontend UI tightening, CI/CD workflow modifications, and clear in-repo documentation to support smoother release cycles.

June 2025

13 Commits • 8 Features

Jun 1, 2025

June 2025 delivered measurable business value through automation, reliability improvements, and UX clarity for Hungry Hungry Hippo. The month focused on shipping an automated CI/CD pipeline, strengthening core integrations, stabilizing system tests, and improving request handling and user workflows to speed feedback, reduce risk, and empower developers and users.

May 2025

1 Commits

May 1, 2025

May 2025: Reliability hardening for hungry-hungry-hippo by upgrading FAST API lookup from HTTP to HTTPS to eliminate 301 redirect failures and stabilize inter-service communication. Implemented via a config change, tracked under commit e254929210933652f5ed8162cdf271348ba1bacc ("Hit FAST API over HTTPS"). The change reduces lookup errors, lowers retry load on the FAST service, and improves uptime for downstream consumers. No new features were shipped this month; the focus was on reliability, security, and maintainability. Technologies include HTTPS/TLS, REST APIs, and configuration management with clear commit traceability.

April 2025

11 Commits • 2 Features

Apr 1, 2025

April 2025 monthly summary for sul-dlss/hungry-hungry-hippo. Key work focused on modularizing the codebase and hardening API robustness to improve maintainability, debuggability, and business resilience.

March 2025

12 Commits • 7 Features

Mar 1, 2025

For 2025-03, delivered a set of UI and backend improvements in hungry-hungry-hippo, focusing on admin capabilities, UI consistency, data path standardization, and developer productivity. Key outcomes include enhanced admin search for depositor SUNet IDs, standardized DRUID usage across collection/work paths, unified pane rendering within tabbed interfaces, dynamic form validation feedback, and infrastructure improvements for code quality and test coverage. A bug fix resolved a routing issue by redirecting authenticated users to the main application's login path in mission control jobs. These changes reduce operational effort, improve data reliability and user experience, and lower release risk.

February 2025

33 Commits • 15 Features

Feb 1, 2025

February 2025: Delivered a set of developer-focused tooling, platform/config cleanups, UI/UX refinements, and observability enhancements across sul-dlss/hungry-hungry-hippo. The release improves local development velocity, test reliability, system visibility, and admin capabilities, enabling faster delivery, cleaner configuration, and better user experiences for both developers and end users.

January 2025

11 Commits • 4 Features

Jan 1, 2025

January 2025 performance snapshot for sul-dlss/hungry-hungry-hippo. Delivered core features, improved security and reliability, and strengthened CI/CD, delivering measurable business value across localization, data integrity, user experience, and developer productivity. Key outcomes include localization accuracy improved via i18n cleanup, validation robustness with context-aware rules, UI branding and deposits visibility, security hardening reduces risk of cookie overflow and stabilizes tests, and CI/CD modernization improves coverage visibility and automation reliability.

December 2024

36 Commits • 16 Features

Dec 1, 2024

December 2024, the Hungry Hungry Hippo project delivered a targeted set of stability, quality, and developer-experience improvements that reduce risk, speed up iteration, and improve reliability across the stack. The work strengthens frontend code quality, testing reliability, and contributor workflow while setting the stage for new capabilities (keywords, ORCID integration, and API-backed features).

November 2024

19 Commits • 4 Features

Nov 1, 2024

November 2024 monthly summary for sul-dlss/hungry-hungry-hippo focusing on delivering a cohesive platform upgrade and developer experience improvements. This period emphasized aligning local development with production, stabilizing the framework stack, improving nested-resource UI for Works, and elevating code quality with tooling and CI/CD enhancements. Business value centered on system parity, reliability, and faster iteration cycles for feature work.

Activity

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Quality Metrics

Correctness92.6%
Maintainability92.2%
Architecture89.6%
Performance84.6%
AI Usage20.0%

Skills & Technologies

Programming Languages

ERBErbGroovyHTMLHTML ERBJavaScriptMarkdownRSpecRubySCSS

Technical Skills

API IntegrationAccess ControlActiveModelAdmin Interface DevelopmentAsset ManagementAuthenticationAuthorizationBack-end DevelopmentBackend DevelopmentBrowser AutomationBuild ProcessBuild ToolsCI/CDCI/CD ConfigurationCSS

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

sul-dlss/hungry-hungry-hippo

Nov 2024 Jul 2025
9 Months active

Languages Used

ERBHTMLJavaScriptMarkdownRubyShellYAMLSCSS

Technical Skills

ActiveModelBack-end DevelopmentBackend DevelopmentCI/CDCode OrganizationCode Quality

sul-dlss/purl-fetcher

Aug 2025 Oct 2025
2 Months active

Languages Used

Ruby

Technical Skills

API IntegrationBackend DevelopmentDependency ManagementTestingXML Processing

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