Freelancer profile translated to English.
Back to original languageAbout Guillaume
Developer for 6 years now, I am committed to developing and designing high-performance applications with a particular focus on their quality. Primarily interested in backend issues, I have deepened my knowledge in mastering Java and the Spring framework while keeping a close eye on other issues in our profession (pipeline/deployment solutions, frontend, ...). Curious, I enjoy learning and discussing architectural patterns, programming paradigms, or new languages.
French
Native or bilingual
Can work on-site
Lyon (up to 50km)
Experience
- IT Solutions FactoryTechnical LeadTELECOMMUNICATIONSSeptember 2018 - January 2024 (5 years and 4 months)Lyon, FranceDevelopment of a telecom billing system
- Technological and architectural migration of the application to allow for better adoption by dev/devops teams
- Implementation of B2C billing
- Architectural migration to make the tool multi-brand/country
- Monitoring and tracking of production incidents and application performance
Java, Spring, JPA, mariaDB, maven, Polling, mybatis, PDFBox, docker, tomcat, gitlabCIDevelopment of a multi-brand/country telecom CRM solution- Support for existing systems
- Development of new features
Java, Spring, JPA, mariaDB, Liquibase, Microservice, Maven, Event-driven, Rabbit MQ, keycloakDevelopment of a telecommunications surveillance solutionJava, Spring, JPA, postgresql (partitioned), mybatis, Maven - Ippon TechnologiesDevelopment EngineerDIGITAL AND ITJune 2017 - August 2018 (1 year and 2 months)Paris, FranceMarch 2018 – August 2018**Development of a multi-model and multi-brand car configurator.Java 8, Microservices, gradle, React, Mockito,May 2017 – March 2018Complete overhaul of a tool (V1 in 2005) for estimating/valuing financial provisions intended to cover future costs related to the redevelopment, closure, and long-term monitoring (30 years) of over 350 storage centers (CDS). The tool thus manages over 500 ME in compliance with current standards and regulations.• Implementation of a historization system;• Management of different environments;• Migration of data from Oracle to MSSQL;• Adaptation of the calculation engine to the new data model;• Financial report export functionalitiesJava8, Jhipster (Spring boot/Angular4), Maven, Hibernate (Core, Envers), MSSQL, Azure, Redis, LiquibaseApril - May 2017Pilot allowing reporting and logging of incidents and events occurring within a building. This web application communicates with field agents via a 2D map with the security PC, as well as an interface conveying information.• Comparative study of the two main map API leaders• Implementation of the mapping system:◦ Loading of layers provided via private geoserveurs◦ Creation, movement, and deletion of geometric shapes, icons, and text areasJava, Jhipster (Spring boot/Angular2), Hibernate, OpenLayer4, Gradle
- EkinoJava Intern EngineerApril 2016 - September 2016 (5 months)Vehicle rental and sharing solution in B2B and B2B2C. The project relies on two mobile applications, a customer website, and an administration website, all connected to a microservices API consisting of 6 services and 3 gateways.• Development of the API part in REST microservices;• Development of various features; Java8, REST, Microservices, Spring boot, Hibernate, JavaRX, ElasticSearch, Gradle, Postgresql, Mockito, Swagger
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Education
- Master Software EngineerEFREI2017➜Majeure : Software Engineering langue d'enseignement : Anglais APIIT-UCTI : Asian Pacific Institute of Information Technology - University College of Technology & innovation | Kuala Lumpur, Malaisie