Freelancer profile translated to English.

Description

Looking for a software engineer who can design and evolve reliable, high-performing, and maintainable applications?

I help companies and technical teams develop robust business applications, web platforms, and backend solutions, primarily using Java/JEE, JSF, Spring Boot, Angular, and Flutter.

I work on creating new applications as well as evolving or modernizing existing ones: designing REST APIs, full-stack development, performance improvement, implementing best practices, and DevOps support.

Accustomed to professional environments, I work with a results-oriented approach: understanding needs, pragmatic solutions, clean code, and actionable deliverables.

Types of projects supported: business applications, SaaS platforms, backend APIs, web and mobile applications, production deployment, and technical support.

Industry field of expertise

Languages

French
Native or bilingual

Workplace preferences

Can work on-site

Toulouse (up to 20km), Paris (up to 20km), Montpellier (up to 20km)

ENEDIS
Java / Angular Developer
ENERGY AND UTILITIES
June 2025 - December 2025 (6 months)
Lyon, France
Design / Analysis:
◼ Analysis of needs for the development of client-oriented features and internal tools.
◼ Participation in discussions on the evolution of the existing architecture.

Architecture:
◼ Involvement in a microservices architecture environment for internal and external applications.
◼ Integration of partner APIs.

Backend Development:
◼ Evolutionary maintenance of existing microservices (Batch, MapStruct, Java 17, Spring, Kafka).
◼ Development of new business features on the back-end.
◼ Use of Jooq for interaction with PostgreSQL databases.
◼ Use of REST API.

CI/CD:
◼ Continuous integration and deployments via Jenkins, Gitlab Pipelines, Kubernetes, and Nexus.
◼ Use of Git for source code management in an AWS / Linux environment.

Quality / Testing:
◼ Setup and maintenance of end-to-end tests with Cypress, unit tests, integration tests, and black-box tests.
◼ Monitoring of evolutions via AWS logs, Gatling (performance).

Production Deployment / Support:
◼ Participation in regular module deliveries.
◼ Corrective and evolutionary maintenance of applications.
Java Angular microservices-architecture CI/CD Apache Kafka
TESSI
Fullstack Java / Angular Developer
MEDICAL
April 2024 - April 2025 (1 year)
Toulouse, France
Client specializing in software publishing for mutual insurance and insurance companies.

Design / Analysis:
◼ Study of functional and technical slowdowns through fine analysis of application and database performance.
◼ Participation in the analysis of critical flows in a microservices architecture.
◼ Writing technical documentation and performance reports.

Architecture:
◼ Implementation and configuration of Linux VMs in a distributed architecture (database VM, application VM, dedicated VM for performance testing).
◼ Setup of a complete monitoring and load testing environment: Grafana, JProfiler, TKProf.

Backend Development:
◼ Optimization of Java / Spring Boot code (refactoring, metadata management, service processing improvement).
◼ Development and correction of stored procedures in PL/SQL.
Spring boot Angular Java Oracle PL/SQL Jenkins
WISEED
Java Spring Developer
PRIVATE EQUITY
February 2024 - April 2024 (2 months)
Toulouse, France
Client specializing in crowdfunding.

Design / Analysis:
◼ Analysis of needs for the development of client-oriented features and internal tools.
◼ Participation in discussions on the evolution of the existing architecture.

Architecture:
◼ Involvement in a microservices architecture environment for internal and external applications.
◼ Integration of partner APIs (Lemonway for payments, Universign for electronic signature).

Backend Development:
◼ Evolutionary maintenance of existing microservices (Spring Boot, Java 11 / 17, Kotlin).
◼ Development of new business features on the back-end.
◼ Use of JPA and JPQL queries for interaction with the PostgreSQL database.
◼ Use of the Play framework on certain backend services.

CI/CD:
◼ Continuous integration and deployments via Jenkins and Bitbucket Pipelines.
◼ Use of Git for version management in an AWS / Linux environment.

Quality / Testing:
◼ Setup and maintenance of unit and integration tests.
◼ Monitoring of evolutions via Jira.

Production Deployment / Support:
◼ Participation in regular module deliveries.
◼ Corrective and evolutionary maintenance of applications.

Security:
◼ Integration of secure APIs (Lemonway, Universign) but no direct management of authentication/authorization layers.

Data Management:
◼ Complex queries via JPQL and SQL.
◼ PostgreSQL 12 as the primary database.
Java Spring boot Kotlin Angular CI/CD

Check out Kokou E Constantin's experience

Be the first to recommend Kokou E Constantin

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

Master 2Expert
EPSI
2023
Master 2Expert
Bachelor's degree in Vision for Industrial Robotics.
University of Nîmes
2021
Licence en vision pour la robotique industrielle.

Check out Kokou E Constantin's education

Software Engineer

Kokou E Constantin Eyessi

Java Software Engineer | Spring | Angular | Flutter

About Kokou E Constantin

Experience

Recommendations

These freelancer profiles also match your criteria

Education

Skill set

Categories