HELMI HASSINE

• Developed and maintained critical microservices for the Goods Vehicle Movement system, enabling real-time logistics tracking for post-Brexit trade.
• Led the migration from Spring Boot 2 to 3 with minimal downtime; introduced new features and ensured compatibility with updated dependencies.
• Implemented resilience patterns using Resilience4J (circuit breaker, retry) to improve system stability and reduce failures by ~30%.
• Mentored junior engineers in best coding practices, leading to a 20% decrease in defect rates.
• Collaborated with cross-functional teams (1 SM, 1 BA, 3 QA, 8 Devs) in an agile (Scrum) environment

Technologies: Java 11/17, Spring Boot, Docker, Kubernetes, AWS, Resilience4J, Maven, Git, JUnit, Mockito, Cucumber, PostgreSQL

• Enhanced SAAS microservices to streamline automotive dealership operations, improving data flow and cutting error rates by ~15%.
• Built RESTful APIs and integrated them with React frontends, boosting system performance and end-user satisfaction.
• Contributed to architectural discussions and code reviews, emphasizing performance, reliability, and security best practices.
• Provided technical mentorship and onboarding for new developers, helping the team adopt TDD/BDD effectively.

Technologies: Java 8/11, Spring Boot, ReactJS, Docker, Kubernetes, MongoDB, GCP, Keycloak, Maven, Git

• Participated in designing and developing DLE (Datalake Explorer) and ONE TD, focusing on microservice architecture and REST APIs.
• Led authentication process implementations using OAuth2 (Authorization Code Flow).
• Oversaw DevOps setup (GitLab CI, Docker, Kubernetes), reducing deployment times by ~40%.
• Conducted pair-programming and refactoring sessions to maintain high code quality

Technologies: Java 8, Spring Boot, Docker, Kubernetes, GitLab, PostgreSQL, MongoDB, Angular, GCP, Keycloak

Designed and implemented a multi-channel push platform to serve both business and private banking customers.

• Collaborated with architects to define technical direction and produce operational documentation.
• Managed pair-programming and refactoring initiatives, improving code coverage and quality metrics.

Technologies: Java 8, Spring (Batch, Data, Security), Hibernate, Oracle, MongoDB, Maven, Git, Jenkins

• Built an application for referential management panelist, using Java/J2EE, JSF (Primefaces), Spring Batch, and AWS for test automation.

• Led design and implementation of a collateral management system; assigned coding modules, ensured CI with Jenkins, introduced pair-programming.

• Migrated a banking web portal from WAS 6.1 to WAS 7; developed JSF frontends and integrated CORBA services.

• Developed a banking web portal for bond processing; utilized Java EE, XML/XSL, and Tomcat.

• Implemented a web portal for auto warranty management in a SOA context, using JSF/RichFaces and Spring/Hibernate.

• Developed features for a J2EE multi-B2B back-office module; implemented real-time order integration with Spring Batch.