Freelancer profile translated to English.

Description

I am a Java / Spring Boot backend developer, specializing in designing clean, robust, and scalable REST APIs. I work on backend projects with a professional approach focused on best practices, code readability, and production reliability.

I have worked on concrete projects including user management, authentication (login / register, JWT preparation), setting up JPA / Hibernate relationships, using DTOs, data validation, and unit and integration tests (JUnit, Mockito).

Main technologies: Java, Spring Boot, Spring Data JPA, Spring Security, PostgreSQL, MySQL, Git, Docker (basics).

What I bring to my clients:

A structured and maintainable backend

Clear communication and genuine listening to needs

A serious, involved, and reliable developer

Features designed to evolve over time

I can assist you with creating or improving backend APIs, adding new features, securing your application, or taking over an existing project.

🎯 Goal: to deliver a stable, clear, and production-ready backend.

Industry field of expertise

Languages

French
Native or bilingual
English
Conversational

Workplace preferences

Can work on-site

Lyon (up to 50km), Ambérieu-en-Bugey (up to 50km), Genève (up to 50km), Oyonnax (up to 50km)

lesbonsservices
Web Developer Back-end / Front-end
January 2026 - Today (7 months)
Creation of a service platform between individuals and professionals. Backend development Java Spring-Boot and frontend development Angular.

Development of a REST API
Conceptual Data Model, Logical Data Model, Physical Data Model
JPA/Hibernate, DTO, validation
PostgreSQL database
Unit tests
Integration tests
Back-End Development Front-End Development REST API Spring boot Angular
Formatech
Java / Spring Boot Back-end Developer
EDUCATION AND E-LEARNING
May 2024 - July 2025 (1 year and 2 months)
Development of a backend platform for managing training centers.
Design and implementation of a REST API with Spring Boot, enabling the management of users, trainers, students, modules, sessions, and institutions.
Complete database modeling (entities, JPA relationships, inheritance), implementation of DTOs to secure exchanges, and structuring of a maintainable and scalable architecture.
Java Spring boot Back-End Development REST API Relational database
D&co
PHP Symfony Web Developer
DIGITAL AND IT
October 2024 - February 2025 (4 months)
Lyon, France
Design and development of a training center management platform:
Creation of UI/UX mockups on Figma, database modeling (Conceptual, Logical, Physical), backend and frontend development.
PHP Symfony HTML/CSS/JS Database creation figma mockup

Check out Karim's experience

Be the first to recommend Karim

Help this freelancer shine by sharing your experience working together.

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

Baptiste Duhen

Fullstack developer

4.6

(4)

Amed Hamou

Senior Lead Developer

(2)

Audrey Champion

Web developer

4.3

(3)

Signup to reveal

Web & Mobile Web Developer
onlineformapro
2024
Formation professionnalisante en développement web et web mobile. Développement back-end avec PHP / Symfony et gestion de bases de données MySQL. Développement front-end avec JavaScript et Vue.js. Création de sites web et de thèmes personnalisés avec WordPress. Conception d’interfaces responsives, intégration web et application des bonnes pratiques de développement.

Karim R.

Full-stack Developer REST API Spring & Angular

About Karim

Experience

Recommendations

These freelancer profiles also match your criteria

Education

Skill set

Categories