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Omar SallahOS

Omar Sallah

Tech Lead Java

€890/day
Rueil-Malmaison, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Omar

Java & Cloud Architect with 11 years of experience, specializing in the design of complex software architectures, the migration of technical foundations, and cloud integration (AWS & Azure).

At SFR, I supported the modernization of strategic IS applications, led Java 8 → 17, Spring Boot migrations, and oversaw the implementation of containerized solutions under Docker/Kubernetes.

As Tech Lead at Club Med, I led the redesign of the Hotel Management System, migrating from an obsolete WYSIWYG Magic solution to a modern, centralized, and scalable Spring Boot architecture.

At SGCIB, I contributed to the creation of a document management platform based on a secure microservices architecture, deployed on Azure, with CI/CD integration and monitoring.

As the founder of MusafirGO, I designed a complete TAD and a cloud-native SaaS architecture deployed on Azure (AKS, APIM, PostgreSQL, CosmosDB, Redis), integrating CI/CD GitHub Actions, observability, Zero-Trust security, and an AI engine based on Hugging Face & Spring AI.

🔑 Key skills:
• Backend: Java 8→17, Spring Boot, Spring Batch, Hibernate/JPA, Node.js, Python FastAPI
• Frontend: Angular, React, TypeScript
• Cloud & DevOps: Azure, AWS, Docker, Kubernetes, GitHub Actions, GitLab CI, Terraform, Jenkins
• Architecture: Microservices, API-first, C4, DDD, 12-Factor, CI/CD, Observability, Application Security (OAuth2, Keycloak, Zero Trust)

I am looking for new missions where I can bring my expertise in software architecture, application modernization, and cloud transformation.
  • English

    Fluent

  • Arabic

    Native or bilingual

  • French

    Native or bilingual

Can work on-site
Rueil-Malmaison (up to 50km)

Experience

  • MisafirGo
    Technical Architect
    TRAVEL AND TOURISM
    March 2025 - Today (1 year and 5 months)
    Rueil-Malmaison, France
    Founder & Technical Architect of MusafirGO, a collaborative travel SaaS platform built on a cloud-native microservices architecture.
    • Design and writing of a Technical Architecture Document (complete TAD) based on the C4 approach.
    • Implementation of a polyglot backend (Java Spring Boot, Node.js, Python FastAPI) and a multilingual Angular frontend.
    • Deployment on Azure (AKS, APIM, PostgreSQL, CosmosDB, Redis, Blob Storage) with automated CI/CD via GitHub Actions.
    • Integration of an AI engine (Hugging Face + Spring AI) for intelligent route generation.
    • Implementation of a secure and scalable architecture: OAuth2/OIDC (Azure AD B2C), Zero-Trust, observability by design (App Insights, Prometheus, Grafana).
    • Management of the complete cycle: design, development, integration, observability, and industrialization of deployments (Terraform, Bicep, Helm, Argo CD).

    Key technologies: Java 17, Spring Boot 3, Angular, Node.js, Python, FastAPI, Redis, OpenSearch, Azure Cloud, Docker, Kubernetes, GitHub Actions.
    Java DevOps JavaScript Software architecture Cloud Azure
  • SFR
    Java Architect
    TELECOMMUNICATIONS
    October 2023 - March 2025 (1 year and 4 months)
    Paris, France
    As a Java Architect at SFR (2023–2025), I designed and implemented innovative software architectures to modernize critical IS applications.
    • Java 8 → 17 migration and adoption of Spring Boot v2/v3 to replace existing foundations.
    • Implementation of cloud-ready solutions with Docker, Kubernetes, and AWS.
    • Design of Proof of Concept (PoC) to validate strategic technology choices.
    • Contribution to La Guilde (internal architect committee) to define architecture standards and influence IS decisions.
    • Technical supervision, code reviews, and design validation to ensure quality, performance, and security.

    Key technologies: Java, Spring Boot, Docker, Kubernetes, Jenkins, GitLab CI/CD, AWS.
    Java Spring boot DevOps Software Craftsmanship Cloud AWS
  • Club Med
    TECH LEAD JAVA
    ENTERTAINMENT AND LEISURE
    January 2022 - July 2023 (1 year and 6 months)
    Paris, France
    As a Java Tech Lead at Club Med (2022–2023), I led the complete redesign of the Property Management System (PMS) to modernize and centralize the application architecture.
    • Migration from a WYSIWYG “Magic” solution to a new architecture based on Spring Boot and Docker.
    • Design of a new centralized data model to replace local databases scattered across resorts.
    • Management of a team of developers: backlog management, planning, code reviews, and dissemination of best practices (Software Craftsmanship, Clean Code, SOLID).
    • Significant improvement in system performance and maintainability through an agile and quality-oriented approach.
    • Writing of architecture and technical design documents to ensure the sustainability and scalability of the solution.

    Technologies: Java, Spring Boot, Docker, GitLab CI/CD, PostgreSQL.
    Java Spring boot DevOps Software Craftsmanship Agile method

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Education

  • Master in Geographic Information Systems
    Faculty of Sciences Casablanca
    2016
  • Bachelor's degree in Mathematical and Computer Sciences
    Faculty of Sciences Casablanca
    2013

Certifications

  • Scrum Foundations Professional Certificate
    Certiprof
    2020

Skill set

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