Fabio Stefani

I am a Staff Backend Engineer and Individual Contributor specializing in high-availability and mission-critical systems across the financial and public sectors. My focus is hands-on technical execution: analyzing legacy code, debugging complex production issues, and ensuring architectural stability. I have extensive experience modernizing legacy architectures, including Mainframe, C++, and early Java, into modern Java (11/17+) and Spring Boot environments under strict uptime and reliability requirements. My background includes high-stakes platforms such as T2S (SIA/Monte Titoli) and large-scale public services like Poupatempo. I am often the go-to engineer for unexplained errors, critical production bottlenecks, and root-cause analysis. Technical stack: Java (11/17+), Spring Boot, microservices, Elasticsearch, SQL, stored procedures, ETL, and legacy modernization.