Aaron User

I am a senior software engineer with deep experience building and operating fintech platforms and high-throughput microservices. I focus on transaction integrity, risk controls, and architecting resilient systems that serve millions of users.

At Chime, I led development of core SpotMe transaction integrity components, implemented audit logging for SOC 2 and PCI compliance, and contributed to decomposing legacy modules into event-driven microservices—improving iteration velocity and uptime.

I design idempotent transaction handling and real-time risk evaluation systems, integrate AI-assisted risk scoring, and drive observability and deployment improvements to minimize production errors and operational cost. My work has reduced overdraft errors, sped dispute resolution, and prevented significant annual financial losses.

I mentor engineers on secure engineering and architecture best practices and have a strong background in payment systems, CI/CD, compliance, and cloud infrastructure. I seek roles where I can lead reliability, risk, and platform initiatives that scale securely.