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Issofa Ntieche MfoumIN

Issofa Ntieche Mfoum

Tech Lead Full Stack | Java, Spring, Angular, AWS

€525/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Issofa

I am passionate about new technologies and I enjoy sharing my knowledge while helping others. My technical expertise, combined with excellent interpersonal skills, allows me to interact effectively with clients and naturally integrate into teams. Always ready to step out of my comfort zone, I readily explore new technologies and enthusiastically take on new challenges to enrich and expand my IT skills.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 50km)

Experience

  • Bpifrance
    Technical Lead
    June 2024 - Today (2 years)
    Paris, France
    Achievements
    ● Design and implementation of a cross-application notification sending application for the train, adopting the BDD (Behavior Driven Design) approach:
    ○ Technical feasibility study and impact analysis of feature implementation
    ○ Load estimation
    ○ Participation in ticket costing workshops (grooming session and sprint planning).
    Technical design, implementation, and evolution of the technical foundation.
    ● Implementation of Spring Boot tools and starters for DEV teams
    ● Technical support for DEV teams for the implementation of their micro-application in their project
    ● Support: DEV/DevOps best practices
    ● Continuous Integration / Continuous Deployment (CI/CD)
    Technical environment
    ■ Architectures & Modeling: Monolith, Microservices, Event Message Driven, Event Sourcing, CQRS, Hexagonal,
    UML, Merise
    ■ Continuous Integration: Kubernetes Tanzu, Docker, Jenkins, GitLab, Ansible, Git, Maven
    ■ Netflix and Spring Cloud Stack: Spring Cloud Gateway, HashiCorp Consul, Zuul, Eureka, Spring
    Cloud Config-Server, Spring Cloud Admin
    ■ Languages and Frameworks: Java (8, 11, 17, 21), SQL, Spring Suite (Spring Boot, Spring Data, Spring
    Core, Spring Cloud), Maven, Liquibase, JUnit, Mockito, Open API v3, Vault, Lombok, MapStruct,
    AngularJs/Angular (8/12, 15, 18),
    ■ Application server: Tomcat server integrated in Spring Boot JAR
    ■ Database: Postgresql 10, ElasticSearch
    ■ Monitoring: Datadog, Log pool
    ■ Testing tools: JMeter, Postman
    ■ Others: Jira, Confluence, Lens
    Java Spring Kubernetes DevSecOps
  • GRDF
    Fullstack developer
    December 2021 - March 2024 (2 years and 3 months)
    Paris, France
    Achievements
    ● Study and analyze business needs adopting the BDD (Behavior Driven Design) approach:
    ○ Technical feasibility study and impact analysis of feature implementation
    ○ Load estimation
    ○ Participation in ticket costing workshops (grooming session and sprint planning)
    ● Integrate and develop the Frontend part:
    ○ Design the main module responsible for form management
    ○ Integration of UIs based on Angular Material and Flex Layout
    ○ Define the correct storage format for forms in a relational database: JSON
    Binary (PostgreSQL).
    ○ Develop the HMI as a PWA (Progressive Web App)
    ○ Develop Service Workers for background processing.
    ● Develop REST APIs for campaign and intervention management based on Spring Boot.
    ● Configure the user identification module, integrating the management of their roles and authorizations within the
    application, using OKTA as a base.
    ● Design and develop Spring Batch Jobs for the extraction, transformation, and export of large volumes of
    data.
    ○ Data extraction from the database via optimized SQL queries
    ○ Export files in CSV format using Chunks.
    ○ Compress generated files in ZIP format,
    ○ Transfer compressed files to an AWS S3 Bucket.
    ● Write unit tests for all business services and APIs using the tools: JUnit, Mockito
    ● Perform load and performance tests throughout the development phase using Apache
    JMeter.
    ● Write SQL scripts to analyze and clean corrupted data in the database.
    ● Apply the TDD approach during the development process
    ● Document APIs with Swagger
    Technical environment
    Java 11, Spring Boot, Spring (Security, Data, Web, Batch), JPA/Hibernate, Maven, OKTA, JMeter,
    JWT, Swagger, Postgresql, Docker, SonarQube, GitLab CI/CD, AWS.
    Java Spring Docker AWS CI/CD
  • LGL Transport
    Fullstack Developer Java, JEE,Spring,Angular
    September 2020 - October 2021 (1 year and 1 month)
    33A Grand-Rue, Roeser, Luxembourg
    Achievements
    ● Participate in Agile ceremonies
    ● Update and optimize the application by incorporating advanced Java 8 features, such as the Stream API,
    lambda expressions, and the new Datetime API, to improve performance and facilitate code maintenance.
    ● Optimize application loading time:
    ○ Apply lazy loading to *ToMany relationships at the JPA entity level.
    ○ Rewrite a large part of the JPQL queries to SQL (Native Query) to improve application performance.
    ○ Factorize Frontend source code to promote reuse of Angular components via a shared folder.
    ○ Develop a new Angular directive responsible for (i) destroying instantiated objects no longer used by the
    application and (ii) unsubscribing from observables.
    ● Develop a module for optimizing email sending based on JavaMail via SMTP (Simple Mail Transfer Protocol).
    ● Develop a generic module for importing and exporting data in PDF, XLS, and CSV formats.
    ● Document the various implemented APIs with Swagger API.
    ● Perform unit tests with JUnit.
    ● Version control database schema evolutions using Flyway
    ● Take charge of resolving and correcting production anomalies (TMA)
    ● Contribute to the technical documentation of the project.
    Technical environment
    Java 8, Spring Boot 2, Spring Security, Spring Data, Spring Web, Git, JWT, Apache JMeter, Swagger, JPA/Hibernate,
    Maven, Postgresql, Angular 8, PrimeNG, Docker
    Java Angular Spring Angular 17 Liquibase

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Education

  • Master
    CNAM
    2024
    Master Systèmes d'information et Business Intelligence

Certifications

Skill set (27)

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