I build and modernize the enterprise tax systems governments run on.

Led the complete redesign of a taxpayer registration system, replacing mail-based verification that took up to 10 days with real-time authentication.

• Ran 300+ test scenarios across 10+ coordinated testers for a clean rollout
• Drove user satisfaction from 3 stars to over 4.5 post-launch
• Demoed the system to multiple tax commission departments and delivered on schedule

Attacked throughput and load problems across batch and real-time paths.

• Raised batch processing from 1,300 to over 4,000 items per minute with caching
• Cut real-time load times 30% through SQL query optimization
• Reduced peak-hour server strain 20% by moving 20+ queries to an overnight batch

Led fraud detection enhancements improving accuracy across hundreds of thousands of tax returns, and aligned updates with three stakeholder departments on compliance and security.

• Mentored a new developer over a year to independently own the subsystem
• Ran on-site discussions to align system changes with regulatory requirements

Converted 40+ VB applications into C# across the fraud, e-services, and returns subsystems, improving performance and maintainability.

• Documented previously undocumented VB logic to reduce technical debt
• Worked in an agile team with weekly production deployments