About Lorenzo
Senior Full-Stack Engineer | Java & React Ecosystems
With over 6 years of experience in software engineering, I specialize in designing, developing, and optimizing high-performance web applications and scalable microservices.
Throughout my career, including my recent job at Rakuten France, I have focused on driving engineering excellence, modernizing legacy systems, and resolving critical performance bottlenecks in high-traffic environments.
🏆 Key Achievements & Impact:
- Reduction of database load by 90% by engineering a custom Redis cache layer with stampede protection.
- Migration of complex enterprise architectures to Java 17 and Spring 3.0, alongside massive JavaScript to TypeScript transitions.
- Design of real-time synchronization systems handling millions of items using Akka, Kafka, and HTTP/2.
- Resolution of critical system vulnerabilities, blocking deadlocks, and Heap Out memory leaks using advanced profiling tools.
Core Technical Skills (Hard Skills):
- Languages: Java (8-17), TypeScript, JavaScript, SQL.
- Backend Frameworks: Spring Boot, Spring MVC, Spring Security, Hibernate, Node.js, Express, Quarkus.
- Frontend Frameworks: React, Angular 7, Bootstrap, Ant Design, HTML5, CSS3.
- Databases & Caching: PostgreSQL, MySQL, MongoDB, Redis, ElasticSearch.
- Architecture & Messaging: Microservices, RESTful APIs, GraphQL, Kafka, Akka.
- DevOps & Tools: Git, GitLab CI/CD, Webpack, Maven, Grafana, Prometheus, Micrometer.
Methodologies: Agile, SCRUM, TDD, Clean Architecture.
Open to Work (Call to Action):
I am currently open to new opportunities as a Senior Full-Stack Developer or Software Engineer (Freelance B2B or Permanent/CDI). I am looking for roles based in Aix-en-Provence, Hybrid, or Full-Remote.
If your team is looking for a dedicated engineer to build resilient software solutions, let's connect! Feel free to send me a direct message here on LinkedIn.
French
Native or bilingual
English
Fluent
Can work on-site
Aix-en-Provence (up to 50km)
Experience
- Rakuten FranceFull-Stack Developer Senior Java/ReactE-COMMERCEJanuary 2024 - Today (2 years and 6 months)Aix-en-Provence, FranceContext: Part of the "Catalog" team, responsible for managing the entirety of Rakuten France's product catalog through a highly available, distributed architecture composed of 8 microservices.- Development of frontend templating services (Velocity) and an automated pictogram generation system.- Modernization of the Front-End stack (React-script5, Antd4, Webpack5, PNPM, TypeScript) and standardization of code formatting (ESLint, Prettier) across 8 differents micro services.- Implementation of a custom Redis cache layer (Spring Data Redis, Lettuce) featuring stampede protection (double-checked locking) and Micrometer monitoring, reducing database calls on concerned table by 90%.- Migration of ORM from EclipseLink to Hibernate, resolving critical blocking deadlocks and deploying Grafana dashboards for database query monitoring.- Redesign of the application scheduling architecture, integrating advanced retry mechanisms and distributed locks.- Deployment of a real-time synchronization application (Akka, Reactor, HTTP/2) between the Elastic catalog and partners (e.g., Google Merchant Center), handling 56 million items.- Upgrade of the Back-End stack to Spring 3.0 and Java 17, alongside a massive codebase transition from JavaScript to TypeScript.- Optimization of application stability and resolution of critical Heap Out memory leaks using JDK Mission Control and Eclipse Memory Analyzer.Technical Stack: Java 17, React, SpringBoot, Hibernate, MariaDB, Oracle, Grafana, Github, Jenkins, Maven, Elasticsearch, Claude Code, Redis, Akka, Docker.
- Softway MedicalFull-Stack DeveloperMEDICALJanuary 2023 - January 2024 (1 year)Aix-en-Provence, FranceContext: Softway Medical is a software publisher in the medical sector, particularly for hospitals or radiology clinics. My team managed the heart of the product, the management of medical documents.Achievements:- Engineered & automated the entire deployment pipeline by implementing GitLab CI/CD from scratch, enabling seamless deployment of our applications onto Kubernetes clusters.- Integration of speech recognition services (Nuance) with OnlyOffice online word processing to streamline medical document management.- Implementation of Grafana dashboards connected to Graylog and Prometheus to monitor database performance and metrics.- Refactoring of legacy codebases, specifically optimizing complex SQL queries to reduce execution time by 70%.- Development of new RESTful APIs and utilization of specialized libraries for automated DOCX document merging.Technical Stack: Java 6 to 11, Stencil.js, Quarkus, Spring, Hibernate, MySQL, Grafana, GitLab.
- My Money BankFull-stack Developer Java/ReactBANKING AND INSURANCEMay 2021 - December 2021 (7 months)Nantes, France- Creation of new secure banking microservices to support business needs.- Securing of the technical infrastructure by updating and patching critical vulnerabilities across all active services.- Implementation of asynchronous event streams integrated with Kafka clusters to ensure reliable data transmission.Technical perimeter : JAVA 11, React, Graphql, Jira, SCRUM, kafka
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Education
- Engineer's degree, NetworksTélécom Physique Strasbourg2018Engineer's degree, Networks
- Dual-Degree Master of Science (M.Sc.)Strasbourg University2018Dual-Degree Master of Science (M.Sc.)
Certifications
- Oracle Certified Associate, Java SE 8 ProgrammerOracle2019
- Oracle Certified Professional, Java SE 8 ProgrammerOracle2019