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Description

Expert Java Backend – REST API & critical systems

Java developer specializing in backend with experience on critical systems (DGFIP).

I work on:

Development of robust REST APIs with Spring Boot

Design of scalable backend architectures (microservices)

Performance optimization (multithreading, concurrency)

Processing large volumes of data

Concrete results

Optimization of backend processes (reduction of execution times)

Improvement of the stability of critical applications

Participation in large-scale systems

Main stack

Java 11/17 • Spring Boot • REST API • PostgreSQL • Docker

Available for Java backend missions (critical systems / performance)

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent
Arabic
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km)

Direction générale des Finances publiques
Java Fullstack Developer
PUBLIC SECTOR
May 2022 - Today (4 years and 1 month)
Noisy-le-Grand, France
Context

E-Contacts project: secure messaging platform between users and tax administration, with strong constraints on volume and availability.

Missions
Development of REST APIs with Spring Boot
Migration of a legacy base to Java 11 / Spring Boot
Implementation of a progressive microservices architecture
Development of a BFF (Back For Front) to interface modern front-end and historical backend
Processing large volumes of data (attachments, streams)
SQL Optimization (PostgreSQL / MongoDB)
Critical bug fixes in production

Results
Reduction of batch processing from several hours to less than 30 minutes
Significant improvement in backend performance
Contribution to the stability of a critical large-scale application

Stack

Java 11 • Spring Boot • REST • PostgreSQL • MongoDB • Docker
Spring boot Java REST API Backend Development Docker
BEYN
Fullstack Developer
BANKING AND INSURANCE
July 2021 - May 2022 (10 months)
Algiers [El Djazaïr], Algeria
Context

Corporate banking platform for Société Générale Algeria.

Missions
Migration of a monolithic architecture (EJB / JSF) to Spring Boot microservices
Development of REST APIs and SOAP web services
Redesign of the transfer workflow engine
Implementation of functionalities compliant with the ISO 20022 standard
Optimization of transfer processing and authorization management
Results
Reduction of the time to add 2000 beneficiaries from 60s to 0.6s
Simplification of complex transfer processing
Improvement of overall platform performance
Stack

Java • Spring Boot • REST • SOAP • PostgreSQL
Java Spring boot REST SOAP PostgreSQL
ELIT Eldjazair Information Technology
Design/Development Engineer
ENERGY AND UTILITIES
November 2019 - July 2021 (1 year and 8 months)
Algiers, AL, Algeria
Context

Development of an insurance management system for 80,000 users.

Missions
Data model design
Backend development (Java EE, JPA)
Creation of user interfaces (JSF / PrimeFaces)
Implementation of member management functionalities
Results
Implementation of a complete benefits management system
Improvement of listing process performance
Stack

Java EE • JPA • JSF • PostgreSQL
JAVA/JEE; JPA/Hibernate JSF PostgreSQL

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Master en ingénierie, Ingénierie logicielle
Université Badji Mokhtar de Annaba
2012
Master en ingénierie, Ingénierie logicielle
Licence, Intelligence artificielle
Universitaire de Souk-Ahras
2009
Licence, Intelligence artificielle

Check out Iskander's education

Iskander K.

Expert Java Spring Boot | REST API | Backend

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