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Mohamed J.MJ

Mohamed J.

Senior Java React Software Engineer

€656/day
Paris, FR
8-15 years

Average response time: 1 hour

About Mohamed

Senior Fullstack Software Engineer with 9 years of experience building high-performance backend systems and product-facing frontend interfaces in high-stakes environments (Amundi, SG CIB, BNP Paribas CIB, Crédit Agricole CIB). Strong Java / Spring Boot backend combined with consistent frontend delivery (React, TypeScript). Product-minded engineer who owns features end-to-end — from architecture decisions to production monitoring. Currently building a full-stack crypto trading platform from scratch, applying modern architecture independently.
  • French

    Native or bilingual

  • English

    Fluent

  • Arabic

    Native or bilingual

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

Experience

  • Crédit Agricole CIB (CACIB)
    Senior Java Software Engineer
    October 2022 - Today (3 years and 8 months)
    Paris, France
    • • Designed and developed a Derivatives & Repo contract repository (TCL — Trade Contract Link): daily batch processing and real-time API calls with sub-10ms SLA.
    • • Full-stack delivery: React 18 frontend (AG Grid, React Query, Redux) + Spring Boot 3 backend — owned the complete feature lifecycle
    • • Implemented a generic NRT (Non-Regression Testing) framework for before/after comparison on critical processes — significantly reduced production regressions.
    • • Deep SQL (PostgreSQL) and Java performance optimisation: query tuning, batch processing on high-volume pipelines.
    Stack: Java 11/21, Spring Boot Spring Rest, JWT, OAuth2, Spring Data JPA, Kafka, Spring Batch, PostgreSQL 12, TDD, JUnit 5, ReactJS (React 18), React Query, Redux, AG Grid. Docker the infrastructure team (ArgoCD/GitOps) pipeline
    Java PostgreSQL Spring boot React.js Spring Batch
  • BNP Paribas CIB
    Java Software Engineer
    March 2022 - October 2022 (7 months)
    Paris, France
    • • Maintenance and feature evolution of the secondary market trading platform (CQRS architecture). Boot Data, MySQL
  • Société Générale CIB (SGCIB)
    Java Software Engineer
    March 2019 - March 2022 (3 years)
    Paris, France
    • • Maintenance and feature evolution of the Initial Margin calculation engine (ActivePivot) and Variation Margin certification tools for regulatory compliance.
    Stack: Java 8, Spring Boot 2, Spring REST/Batch/Data, Angular, Oracle 12c, BDD

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Education

  • National Engineering Degree
    INSAT
    2017
    National Engineering Degree

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