Mike Hall

Took broad ownership of stabilizing and modernizing a shared Ruby on Rails platform supporting multiple business lines. Operated as a high-leverage individual contributor addressing architectural complexity, operational blind spots, and performance constraints while making system behavior legible, expanding observability, improving delivery reliability, and increasing insight into system and business behavior. Portions of this work supported preparation of platform-backed assets for external transition, alongside ongoing operational demands.

• Modernized and upgraded large portions of the Ruby and Rails stack across multiple applications, reducing technical debt, addressing security vulnerabilities, and improving long-term maintainability.
• Expanded operational visibility by introducing centralized logging and monitoring, working with hosting providers to interpret metrics and establish actionable insight into system behavior and capacity.
• Designed and built data pipelines synchronizing millions of records between internal systems and third-party services, enabling reliable high-volume operations and new business initiatives.
• Led data-layer remediation efforts by replacing expensive dynamic queries with Materialized Views, materially reducing load on high-traffic reporting and analytics workloads.
• Migrated session and cache workloads from MySQL to Redis, isolating transactional databases from non-critical load and improving response times under peak traffic.
• Optimized CI pipelines by reordering and parallelizing test execution, materially reducing feedback cycle time and improving delivery throughput.

Skills: Platform Modernization, Backend System Architecture, Ruby on Rails, System Observability and Monitoring, CI/CD Optimization, Data Pipelines (ETL), Data Analytics, Database Performance Optimization, Full-Text Search (PostgreSQL), Cache Layer Design (Redis), PostgreSQL, MySQL, Prometheus, Logentries, SendGrid