Jacer Sfar

• • Spearheaded the modernization of a mission-critical 64-module enterprise postal sorting system, migrating from Ant to Maven and upgrading from Java 8 to Java 21 (Jakarta EE 10) while maintaining 100% backward compatibility.

• • Engineered a configurable SFTP ingestion module that automatically polls and processes compressed archives containing critical logistics data. Implemented a memory-efficient streaming parser to read 18M+ records line-by-line, utilizing a dynamic SQL builder to generate optimized INSERT/UPDATE queries for seamless synchronization. Designed and implemented a application orchestration

Global & Insurance Software Vendor

• • Core contributor to the Palmyra Framework, the proprietary engine powering VERMEG's financial software suite serving Banque de France, Crédit Agricole, and Santander. Developed custom ORM layers, Spring context initialization modules, and backward compatibility systems.

• • Led the monolith-to-microservices architectural transformation for major banking clients by designing modular Spring Boot starters that encapsulated domain-specific business logic and enabled independent deployment.

• • Developed a MongoDB Persistence Connector enabling clients to migrate from HBase, implementing a custom data mapping and translation layer that preserved data integrity during transition.

• • Engineered a Massive Query Generator and SLA management solution that reduced complex query execution times from minutes to seconds, directly improving system responsiveness for end users.

• • Implemented a multitenancy layer supporting tenant-aware connection pooling and dynamic Hibernate configurations for SaaS deployments across multiple banking institutions.