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Lamine SefaceneLS

Lamine Sefacene

Supermalter

Lead Fullstack Developer

€478/day
3 projects
Rennes, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Lamine

Fullstack Developer and Tech Lead with 7 years of experience, I am involved from design to deployment on Java / Spring Boot / Angular / Elasticsearch / PostgreSQL / Oracle stacks, in microservices architecture.
I have led development teams on critical projects: modernization of Orange's IS, redesign for the Ministry of Labor, ship management for the Directorate of Maritime Affairs.
What I bring: technical leadership, quality culture (CI/CD, SonarQube, test coverage), and the ability to bridge the gap between technical and business teams.
Available for remote or on-site work.
  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Rennes (up to 50km), Nantes (up to 10km), Paris (up to 10km), Bordeaux (up to 10km), Lille (up to 10km)

Experience

  • Klee Group
    Fullstack Developer
    DIGITAL AND IT
    November 2025 - Today (7 months)
    Nantes, France
    • Migration of the Java 11 application to Java 21 (LTS), ensuring the modernization of the technical stack and compatibility with the latest language features
    • Development and optimization of Elasticsearch searches to improve performance and relevance of results
    • Estimation of new client requirements, contributing to workload assessment and sprint planning
    • Design and development of all integration tests, bringing code coverage to 75% and ensuring reliability and non-regression of features
    Elasticsearch Integration Test Spring boot PostgreSQL Java 21
  • Vite loué Location de voiture
    Freelance Fullstack Developer
    AUTOMOBILE
    January 2025 - August 2025 (7 months)
    Rennes, France
    • Design and implementation of a web management application (vehicles, clients, reservations) based on a microservices architecture.
    • Definition and integration of REST APIs ensuring the consistency, security, and performance of inter-service exchanges.
    • Front-end development using Angular, in compliance with the client's design system and UX/UI standards.
    • Application of best development practices: unit tests (JUnit), code reviews, optimization, and continuous improvement.
    • Close collaboration with the client to prioritize functional evolutions and adjust deliverables according to business needs.
    • Monitoring of the development cycle via a dedicated dashboard and contribution to technical documentation.
    Java17 Angular 17 Microservices PostgreSQL Spring boot
  • Orange
    Technical Manager
    TELECOMMUNICATIONS
    February 2024 - November 2024 (10 months)
    Rennes, France
    • Technical leadership of a team of 5 developers, including deliverable tracking, code reviews, and pair programming.
    • Fullstack development and evolution of features in a microservices architecture, using GitLab Copilot.
    • Management of TMA (Third-Party Maintenance Agreement) for the application scope.
    • Architectural work to modernize and secure critical IS components.
    • Facilitation of project rituals, steering committees, and client discussions.
    • Estimation of new business needs.
    Java 17 Angular 17 Gitlab CI/CD Microservices Oracle

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Education

  • Master 2 (M2), Software Engineering
    University of Rennes I
    2019
    Master 2 (M2), Ingénierie logicielle

Skill set

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