Name: Backend Engineer
Price: 556 EUR
Availability: InStock

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Description

Senior backend engineer (8 years) — Java / Spring Boot

Secure REST API design (OAuth2/JWT)
API-First approach
Multi-API integration
Quality-driven development advocate: TDD/BDD
API testing strategies (JUnit 5, MockMvc, Bruno, REST Assured)
CI/CD with quality gates.
Proactive, code review and pair-programming.

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris (up to 50km)

Decathlon - CSP,
Java Developer
INTERNET OF THINGS (IOT)
January 2023 - Today (3 years and 5 months)
Paris, France
Ride Project (May 2024 – Present)
Design and development of the BFF backend for the Ride mobile application (connected bike): Secure REST APIs (OAuth2/JWT) with an API-First approach, including contracts and integration tests.
Integration of 8+ third-party APIs (STD, Zendesk, Strapi, Laka…), robust error handling, and retry strategies to improve resilience.
Implementation of a testing strategy: JUnit 5, ~650 Bruno API tests (comprehensive scenarios); JaCoCo coverage and SonarCloud quality gates to ensure quality and prevent regressions.
Data storage and processing on GCP (Cloud Storage) and performance optimization for scalability and low latency.
Responsibilities: client authentication design, code reviews, pair-programming, and technical mentoring.
Gaming Project (Jan 2023 - May 2024)
Design of the centralized backend for the online gaming platform (Java 21, Spring Boot) with large-scale real-time communication.
Player state architecture and orchestration via SQS + DynamoDB, statistical processing in AWS Lambda, event broadcasting via Kafka, and SNS notifications.
Implementation of a BFF (HomeDartsClub) optimizing front↔back communication and scalability.
Integration tests on BFF APIs and validation of SQS/Kafka flows to ensure player state consistency.
Environment: GCP, AWS, Java 21, Spring Boot, REST API, Kafka, PostgreSQL, GitHub Actions, OAuth2, Terraform, JUnit 5, Bruno, MockMvc – Scrum.
Java Spring Boot Amazon Web Services Google Cloud Platform (GCP) API
Société Générale, La Defense
Backend Engineer
BANKING AND INSURANCE
March 2021 - January 2023 (1 year and 10 months)
Paris, France
Design and development of business features on the Camunda engine to automate and ensure the reliability of critical workflows.
Creation of reusable UI components (SG-Widgets) to accelerate front-end development and ensure UX consistency.
Implementation of a reliable backend notification system, facilitating the broadcasting of application events.
Migration and integration of third-party widgets into SG-Workflow and development of the task-event module (event triggering based on tasks).
Implementation of unit and integration tests (JUnit, Mockito) on Camunda components and the task-event module, ensuring non-regression of business workflows.
Environment: Java 11, Kotlin, Spring Boot, Camunda, PostgreSQL, Kafka, ReactJS, Gitlab, Docker/Kubernetes — Scrum.
API TDD/BDD Spring Boot Java
SFEIR / Renault Digital,
Backend Engineer
AUTOMOBILE
April 2019 - March 2021 (1 year and 11 months)
Paris, France
Development of the Artemis application for GDPR request management, ensuring compliance and traceability of processing.
Implementation of asynchronous messaging (GCP Pub/Sub) to decouple components and improve resilience.
Design of a GDPR workflow engine and development of multiple integration APIs with the IS.
Continuous deployment on GKE with GitLab-CI pipelines to ensure frequent and stable deliveries.
Test coverage on IS integration APIs and the GDPR workflow engine (JUnit, Spring Test), with Sonar analysis to maintain code quality.
Environment: Java 11, Spring Boot, GCP (Pub/Sub, GKE), PostgreSQL, Angular, Sonar.
Java Spring Boot