Freelancer profile translated to English.

Description

Senior API Solution Designer & Integration Consultant specialized in critical information systems. API design (OpenAPI/Swagger), flow urbanization (Mainframe–ESB–Azure APIM), and security of interfaces exposed to external partners.

Strong RUN culture: major incident management, SLA monitoring, and cross-functional coordination. Dual BUILD/RUN expertise, enabling continuity between design, delivery, and operation.

Industry field of expertise

Languages

French
Native or bilingual
English
Conversational

Workplace preferences

Can work on-site

Lille (up to 50km), Paris (up to 50km)

Oney
Senior API Solution Designer & Integration Consultant
BANKING AND INSURANCE
July 2023 - Today (3 years and 1 month)
Lille, France
Mission
Intervention on critical banking information systems within Oney bank, with a cross-functional role in API design, SI integration, and production flow reliability.

Key Responsibilities

Design and scoping of critical integration flows (Mainframe CICS → ESB STAMBIA → APIM)

API design and governance: OpenAPI/Swagger contracts, standards, and versioning strategy

Urbanization and rationalization of the API/ESB interface portfolio (reduction of "pass-through" flows)

Security of exchanges exposed to external partners

Operational production management: major incidents, TMA coordination, SLA monitoring

Cross-functional interface between business, development, operations, and architecture teams

Environment

Java, Spring Boot, REST/SOAP APIs, OpenAPI, STAMBIA ESB, APIM, Git, Sonar, Eventhub
Java Eventhub REST APIs ESB Stambia
Imprimerie Nationale SA
Tech Lead Migration & Security (Java / IAM)
PUBLIC SECTOR
November 2022 - July 2023 (8 months)
Lille, France
Mission

Intervention on the modernization of a critical biometric certification platform (Crew Member Certificate – CMC) for the Ministry of Transport / DGAC, within a demanding regulatory and security context.

Key Responsibilities

Technical leadership of application migration (Java 8 → 11, Spring Boot 1.5 → 2.7)

Modernization of the identity and authentication foundation (LDAP, Keycloak 3 → 18)

Impact analysis, risk management, and preparation of migration/rollback plans

Contribution to the security of exchanges and continuity of service in production

Technical coordination with project teams and validation of design choices

Environment

Java 11, Spring Boot, Keycloak, LDAP, PostgreSQL, REST/SOAP, Angular, Git, Sonar
Java Spring boot Keycloak LDAP PostgreSQL
ADEO Services
Solution Designer – API & Integration Retail
RETAIL (LARGE RETAILERS)
December 2021 - November 2022 (11 months)
Lille, France
Mission

Participation in the redesign of the international checkout system (Core Model) in a high-volume retail context, with a focus on API design and integration of billing, loyalty, and customer relationship journeys.

Key Responsibilities

Technical and functional scoping of business needs (pricing, billing, loyalty)

Design and specification of microservice-oriented REST APIs for core checkout services

Contribution to the structuring of the Core Model and integration of different countries / business units

Impact studies and feeding the technical backlog in an agile context

Development and integration of dedicated services (e.g., Delivery Certificates, Invoice, Credit Note)

Environment

Kotlin, Spring Boot, REST, Microservices, Kafka, MongoDB, GCP, Git, Sonar
Kotlin Spring boot REST APIs Microservices Kafka