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Ghassen Khalil AtiGK

Ghassen Khalil Ati

Supermalter

Java | Angular | Full Stack | Generative AI | RAG

€644/day
9 projects
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Ghassen Khalil

Full StackSenior Developer+10 years of experienceJava Tech Lead/Spring BootAngularGenerative AILLMsRAGMCPCloud AWS/AzureMicroservicesDevSecOps

I help companies integrateAIinto their applications: automation, business assistants, natural language search, document analysis, workflow optimization. Expertise: Java, Spring Boot, Angular, **LangChain4j**, **OpenAI**, **Mistral**, **Ollama**, **HuggingFace**, **CI/CD**, **MCP**. Scalable, secure, performance & product-oriented solutions.
  • English

    Fluent

  • Arabic

    Native or bilingual

Can work on-site
Paris (up to 50km), Paris (up to 10km)

Experience

  • Haute Autorité de Santé - IT
    Malt logoOn Malt
    Implementation of an API Gateway (Gravitee) and a micro-service for access security
    HEALTH AND WELLNESS
    October 2025 - December 2025 (2 months)
    Paris, France
    • - Benchmarking of API Gateway solutions and identification of the solution that meets the High Health Authority's requirements.
    • - Development and deployment of a micro-service providing secure access to EVAMED ecosystem data
    • - Implementation of Keycloak
    Microservices Java Spring Boot Keycloak API Gateway
  • AXA Group Operations SAS
    Generative AI Developer
    BANKING AND INSURANCE
    March 2025 - Today (1 year and 3 months)
    Paris, France
    Project:CMX AI Studio

    Context:Development of CMX AI Studio which integrates GenAI through use cases such as sensitive data detection and anonymization in CMX (DMS).

    Realization:
    Development of a secure REST API**, built on **Spring BootandLangChain4J**, ensuring real-time communication between the user interface and **LLMmodels (**Mistral**,OpenAI**), via the **ModelHubmiddleware, guaranteeing compliance, traceability, and control ofAIusage within theAXAgroup.
    Design and delivery of an intuitive user interface**, inspired by the standards of tools like **ChatGPTand **DeepSeek**, facilitating the adoption of the platform by non-technical business users.
    Implementation of key AI functionalitiesto industrialize the use of LLMs in the context of document management:
    • **Intelligent memorization of responses**, accessible at any time in the chat via the @response{i} syntax, improving the efficiency and consistency of interactions.
    Storage and reuse of files (PDF, images)during chat sessions with the @file{i} syntax, eliminating re-upload constraints and streamlining exchanges.
    • **Automation of prompt sequences**, allowing users to easily replay recurring scenarios and dynamically enrich them with new documents.
    • **Identification and prioritization of industrializable AI use cases**, through the facilitation of collaborative workshops with technical and business stakeholders spread across 5 continents.
    • **Contribution to the AI maturity of the CMX product**, by integrating scenarios such as sensitive data detection, natural language document search, and automatic anonymization, thereby strengthening the product's added value for all AXA entities.
    Artificial Intelligence (AI) Java Angular Spring Boot LLM
  • Vinci Energies
    Technical Lead Full Stack
    SOFTWARE PUBLISHING
    July 2024 - February 2025 (7 months)
    Nanterre, France
    **Project**: Next Generation City App



    **Context**: SaaS refactoring of a CMMS platform for the global management of smart urban infrastructure.



    **Realization**:
    • Study and challenge of technical and architectural choices for the various incoming and outgoing flows of components / micro-services
    • Market Back-Office: Application dedicated to the initialization of new markets and contracts
    • Design and development of UML diagrams for modeling objects and scenarios.
    • Implementation of a micro-services architecture with business breakdown.
    • Development and documentation of APIs via OpenAPI (Swagger).
    • Implementation of a mechanism that allows sending a payload (request) to an endpoint (Api-of-Apps) provided by the "Infra" team to prepare the provisioning of resources (DB, keycloak access, etc.) for a new tenant (also called market).
    • BIM: Hypervisor for equipment asset management
    • Analysis and understanding of the maintenance business (corrective, evolutionary, preventive) for equipment asset management.
    • Coordination with the BIM-CORE team to identify integration points and achieve BIM-CityApp sharing.
    • Collaboration with the OPS team for the implementation of the CI/CD chain and deployment automation.
    • Development and integration of the "Maintenance" module into the hypervisor (management of reports, intervention workflow).
    • Development of the "Repository" to feed microservices with business data (types of defects, lists of actions, etc.).
    • Integration of the maintenance domain into BIM-CORE using the FORSE graphical tool (relationships between DefectReport, Interventions, PerformedActions, etc.)

    Technical Environment:Java 21, Spring 6, Spring Boot 3.3, Spring Security, RabbitMQ, Keycloak, OpenAPI, microservices, Node.js, Vue.js 3, GitLab CI, Docker, Docker-Compose, Shell scripts, PostgreSQL.
    Spring Boot Microservices Java RabbitMQ Vue.js

Reviews

5.0

Out of 1 rating

M

Morgan

Consultant Data – Modélisation et Gouvernance des Données - Haute Autorité de Santé - IT

Several months project

-

Reviewed on 12/30/2025

Ghassen was involved in a development and API security mission to expose and exchange evaluation data from the HAS IT system of the High Health Authority, in a context with strong constraints regarding security, GDPR compliance, and performance. He joined a task force dedicated to setting up the connector, with the objective of securely exposing read-only data and preparing controlled write endpoints, particularly for feeding dashboards. Ghassen worked on integration aspects, securing data flows, and ensuring compliance with authentication, role-based authorization, and access logging requirements, in close collaboration with technical and functional teams. He demonstrated a good understanding of the challenges related to API Management, exposing sensitive data via an API Gateway, as well as the specific constraints of an IT system in the public and health sectors. His professionalism, rigor, and ability to effectively integrate into a collective and structuring framework were appreciated throughout the mission. I recommend Ghassen for any mission involving secure API architectures, integration via API Gateway, and environments with high compliance requirements.

Recommendations

Soufiane FhiyilSF
FU
Soufiane Fhiyil and 1 other person have recommended Ghassen Khalil

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Education

  • Master 2 in Embedded, Mobile, and Secure Systems
    National Conservatory of Arts and Crafts, Paris
    2017
  • National Engineering Diploma in Software Engineering
    North American Private University: International Institute of Technology, Sfax, TUNISIA
    2014

Certifications

  • Cisco CCNA 1
    Cisco
    2014

Skill set

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