Meisam Sabzi

I've built backend services for IranKish's digital Rial wallet platform, supporting real-time balance management, transaction processing, and wallet operations at scale.

I use Java, Spring Boot, Spring WebFlux, Redis, Keycloak, and Spring Security to deliver secure, non-blocking financial services. I led a full wallet and transaction database migration with zero data loss and minimal downtime, while caching balance data to reduce database load and improve response times.

As a freelance backend developer, I delivered end-to-end Java and Spring Boot solutions, from requirements gathering and API design through deployment. I built REST and SOAP services, JWT and RBAC security, PostgreSQL schemas, and Dockerized multi-container environments.

Across Scooba and APA, I've developed distributed microservices, improved API performance by about 30%, and created a QR code-based cross-device login solution. I care about maintainable software built with SOLID principles, Clean Architecture, and practical microservice patterns.