Mike Hall

Engaged as a short-term senior contributor to address deep structural complexity in the core backend systems. Focused on improving testability, performance, and change safety within a tightly coupled legacy PHP codebase, while making targeted frontend enhancements to stabilize and extend the existing test suite.

• Diagnosed structural constraints in the core backend subsystem and established a path for safe iteration on contact management and business rules.
• Introduced testable query patterns and caching strategies to replace ad-hoc global data access, improving performance and enabling more reliable automated testing.
• Reduced risk in a highly coupled legacy codebase by isolating critical behaviors behind clearer boundaries, enabling incremental change without large-scale rewrites.
• Extended and hardened the existing frontend test suite in Ember, improving reliability and confidence in UI-driven workflows.
• Improved developer feedback loops by making previously opaque behavior observable through tests rather than runtime debugging.

Skills: Legacy System Modernization, Backend System Architecture, Testability and Change Safety, Performance Optimization, PHP, MySQL, Ember.js, JavaScript, Automated Testing