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Thierno BarryTB

Thierno Barry

FullStack Developer (JAVA, ANGULAR, PHP/SYMFONY)

€600/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Thierno

Full Stack Developer with 7 years of experience, specializing in Java and Angular, I design robust, secure, and scalable web applications.

I am involved in the entire project lifecycle: from requirements analysis to production deployment, including the design of microservices architectures and the implementation of CI/CD pipelines.

Accustomed to demanding environments (public sector, critical systems), I place a strong emphasis on code quality, security, and performance.

What I can bring you

✔ Design and develop robust REST APIs
✔ Implement microservices architectures
✔ Secure your applications (Keycloak, MFA, OAuth2, role management)
✔ Modernize your applications (Angular migration, Java version upgrades)
✔ Improve quality (tests, coverage, SonarQube)
✔ Industrialize your deployments (CI/CD, Jenkins, Ansible)
✔ Integrate external systems (APIs, equipment, business tools)

💼 Key Experiences
🔹 IN Groupe (International project – secure documents)
Migration of a critical application from Angular 8 to Angular 21
Development of a packaging and shipping application
Implementation of security via Keycloak (authentication, tokens, roles)
Integration of Zebra terminals (scanning) and thermal printers
Implementation of reusable Angular components (Material)
Participation in deployments (Jenkins, Ansible, Bitbucket)

👉 Critical environment with high demands for traceability, security, and performance

🔹 CNAV / Assurance Retraite (high national traffic)
Development of APIs and microservices in Spring Boot
Implementation of MFA authentication
Migration to Java 21
Quality improvement (automated tests, coverage)
CI/CD with Jenkins + quality with SonarQube
Development of batch jobs (Spring Batch, Data Flow)
Technical supervision of developers

👉 Applications used on a large scale with performance and data security challenges
  • French

    Native or bilingual

  • English

    Basic

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

Experience

  • in groupe
    Software Development Engineer Consultant
    PUBLIC SECTOR
    November 2025 - Today (7 months)
    Vélizy-Villacoublay, France
    As part of an international project for the production of secure documents (passports, driver's licenses), I work on critical applications related to manufacturing tracking, packaging, and shipping.

    My main contributions:

    Migration and modernization of a front-end application
    Complete redesign of a legacy application (Angular 8 → Angular 21) with improvements in performance, maintainability, and user experience.
    Development of a strategic business application
    Design and development of a management system for packaging and shipping produced documents, incorporating strong traceability and reliability constraints.
    Implementation of application security
    Implementation of authentication via Keycloak (token, role, and session management), ensuring secure access to sensitive functionalities.
    Integration of industrial systems (hardware)
    Connection with Zebra terminals for document reading (passports, packages) and integration of thermal printers for shipping label printing.
    Industrialization and deployment
    Participation in the setup and execution of CI/CD pipelines (Jenkins, Ansible, Bitbucket), in collaboration with DevOps teams.
    International documentation and collaboration
    Writing technical documentation in English (Confluence) and working in a multi-team environment.

    👉 Critical environment with strong requirements in:

    data security
    operation traceability
    performance and reliability

    👉 Added value: ability to work on complex systems combining modern front-end, secure back-end, and hardware integration.
    Angular Typescript Gitlab CI/CD Bitbucket Jira/Confluence
  • RATP
    Development Engineer Consultant
    TRANSPORTATION
    July 2025 - October 2025 (3 months)
    Paris, France
    As part of an assignment for the maintenance teams of RER lines A and B, I participated in the development of internal applications aimed at improving operational management and intervention tracking.

    My main contributions:

    Development of business applications
    Design and development of Node.js tools (AdonisJS) to optimize maintenance processes and field activity tracking.
    Implementation of access security
    Implementation of authentication via Okta, with session management and secure communication.
    User and rights management
    Implementation of a role-based access control (RBAC) system linked to PostgreSQL and KeyDB (Redis cache).
    Backend design and data management
    Database structuring and API development to ensure application consistency and performance.
    Technical documentation
    Writing documentation to facilitate maintenance and knowledge transfer.

    👉 Demanding business context with challenges in:

    reliability of operational tools
    access security
    performance of applications used by field teams

    👉 Added value: ability to rapidly develop secure backend solutions tailored to business needs, in a constrained environment.
    JavaScript Adonis.js Vue.js PostgreSQL Okta
  • La Carsat centre ouest
    Fullstack Java & Angular Developer
    BANKING AND INSURANCE
    September 2021 - July 2025 (3 years and 10 months)
    Limoges, France
    🔹 CNAV / Assurance Retraite (high national traffic)
    Development of APIs and microservices in Spring Boot
    Implementation of MFA authentication
    Migration to Java 21
    Quality improvement (automated tests, coverage)
    CI/CD with Jenkins + quality with SonarQube
    Development of batch jobs (Spring Batch, Data Flow)
    Technical supervision of developers

    👉 Applications used on a large scale with performance and data security challenges
    Java Angular JavaScript Typescript Spring boot

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Education

  • Master 1 & 2
    Aden Formartion
    2019
    Master 1 & 2
  • Computer Science Degree
    University of Caen - Sciences
    2019
    Licence informatique

Skill set

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