Mike Hall

Staff Software Engineer

Location Chicago, IL
Email mike@just3ws.com
Web just3ws.com
LinkedIn linkedin.com/in/just3ws/
GitHub github.com/just3ws

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Role & Career Context

Detailed experience breakdown, architectural achievements, and related archival artifacts.

Senior Software Developer

ActiveCampaign | Chicago, IL | September 2018 - December 2018

Short-term senior contract on the Contacts team of a large-scale PHP/MySQL CRM platform. Focused on testability, performance, and change safety inside a tightly coupled legacy backend while extending the Ember.js frontend test suite.

Legacy Query Modernization: Replaced ad-hoc global data access with structured, cacheable query patterns in the PHP backend, enabling unit testability and sub-second query execution.
Frontend Verification Gates: Hardened Ember.js automated test suites across core CRM contact workflows, creating safety gates that enabled non-breaking legacy PHP refactoring.

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