Mike Hall

Owned enterprise assessment workflows, leading correctness and platform security in a high-concurrency environment.

• Critical assessment calculation errors were addressed by analyzing and optimizing complex PostgreSQL queries, improving accuracy and reducing response times.
• Vulnerable submission pipelines were addressed by implementing JWT-based response verification, preventing tampering and enforcing once-only processing.
• Unsafe third-party integrations were addressed by designing a secure cross-origin API for embedded clients, establishing explicit trust boundaries.
• High-concurrency performance bottlenecks were addressed by optimizing database interactions, reducing operational risk under heavy load.
• Rework and unclear requirements were addressed by introducing lightweight team practices, improving delivery reliability.

Skills: Ruby, Ruby on Rails, PostgreSQL, JWT Authentication, Backend System Architecture, Secure API Design, Database Performance Optimization, Observability and Logging