Freelancer profile translated to English.

Description

Need to develop, optimize, or modernize your Java / Spring Boot backend? I am a freelance developer specializing in Java & Spring Boot with over 4 years of experience in critical business applications, high-performance APIs, and robust architectures. I handle the entire backend lifecycle: needs analysis, design, development, optimization, security, testing, deployment, and support. I rely on solid and proven technical expertise:

- REST & GraphQL API Design: structured, performant, easy to integrate.

- Microservices Architecture: business decomposition, inter-service communication, resilience, and scalability.

- Advanced Security: OAuth2, JWT, Keycloak, fine-grained access management.

- Automation & High-Volume Processing: Spring Batch, Excel file management (Apache-POI), JSON, XML.

- Performance & Quality: SQL/Hibernate optimization, PDF/Excel reporting (JasperReports).

- DevOps: Docker, Nginx, CI/CD with GitLab, GitHub Actions, or Jenkins.

- SaaS Applications: multi-tenant, multi-database.

What you gain: a reliable, maintainable, scalable backend, built to last and perfectly aligned with your business challenges.

Languages

French
Fluent
English
Conversational
Arabic
Native or bilingual

Workplace preferences

Remote only

Primarily works remotely

ENAGEO – Entreprise Nationale de Géophysique
Java / Spring Boot Back-End Developer
ENERGY AND UTILITIES
February 2023 - Today (3 years and 4 months)
Alger, Algeria
📌 Fixed Assets Inventory Application:

Needs analysis, design, and complete backend development (Spring Boot).

Implementation of REST APIs (missions, discrepancies, assignments, PDA synchronization).

Setup of authentication via Keycloak + fine-grained management of business roles (AOP/RBAC).

Direct collaboration with the Android team (PDA), end-users, and application support.

📌 FDU/DSU Integration Module – Spring Batch

Design and development of an automatic file import and processing module for laboratory data.

Extraction and identification of FDU/DSU equipment + automatic assignment to structures.

Optimization of the batch workflow and continuous improvement of SQL performance.

📌 Asset Application

Corrective and evolutionary maintenance: refactoring, SQL query optimization, and backend stabilization.

Development of complete business modules (equipment management, depreciation, internal automations).

📌 Purchasing Application

Development of a Purchasing data import/validation module (Excel → business processing).

Creation of advanced PDF/Excel reporting via JasperReports.

📌 Other Contributions

Technical support and maintenance on other projects (bug fixing, stabilization).
Spring boot Spring MVC Spring Batch Front-End Development Git/GitLab
CM Consulting
Java / Web Developer
DIGITAL AND IT
June 2021 - April 2023 (1 year and 10 months)
Alger, Algeria
📌 CarOptiPro Solution – Automotive Fleet Management

Business needs analysis, specification writing, and technical design.

Java / Spring Boot Back-End Development for key solution modules.

Participation in Front-End development with Thymeleaf and UX improvement.

📌 Multi-tenant / Multi-database SaaS Version

Design and implementation of a multi-tenant SaaS architecture (client data isolation).

Dynamic data source configuration and automated provisioning management.

Advanced management of client contexts to improve scalability and maintainability.

📌 License Management – TrueLicense

Integration of the software licensing system (activation, validation, renewal).

Securing platform access according to the adopted business model.

📌 Deployment and Administration (On-premise & VPS)

Production deployment via Docker, Docker Compose, and Nginx reverse proxy.

Deployment on local servers and VPS, server performance optimization.

Environment and log management, and technical support.

📌 Collaboration & Methodology

Close collaboration with functional teams, support, and end-users.

Project organization and task tracking in Agile mode via OpenProject.

📌 Technical Stack
Java, Spring Boot, Spring Security, JPA/Hibernate, Thymeleaf, MySQL, Docker, Docker Compose, Nginx, Git, JUnit, OpenProject
Spring boot Docker JPA VPS Spring Security