Freelancer profile translated to English.

Description

Full-Stack Developer with 2 years of experience on missions for major national players — Adeo (Leroy Merlin, Bricoman) and Norauto. I primarily work on Java Spring Boot APIs and Vue.js frontends, in demanding contexts: hexagonal architecture, micro frontends, Kubernetes, Kafka event-driven systems.

What sets me apart: I deliver code that improves business metrics, not just features. 50% reduction in support tickets, improved supplier response times, creation of shared libraries, automation of repetitive tasks using AI — I enjoy digging into problems to their root cause and proposing sustainable solutions.

What I bring to your missions:

Development of robust APIs — Spring Boot, hexagonal architecture/DDD, testing, CI/CD
Vue.js & React Frontends — micro-frontends, shared components, API integration
IT System Modernization & Stabilization — migration, technical debt reduction, root cause analysis
Event-Driven Architecture — Kafka, asynchronous flows, multi-product ecosystems

Key Achievements:

50% RUN tickets — resolution of critical bugs and stabilization of an Adeo product in production
Reduced supplier incident resolution time — feature for creating supplier incidents directly within Adeo portals, eliminating off-platform back-and-forth
AI script for release notes — automation and standardization of product communications at Adeo
Error management library — at Norauto, reduction of unjustified support requests for teams
Data-backed product decisions — integration of analytics on a tablet kiosk application at Norauto to guide strategic product team decisions

JUNIA ISEN Lille Engineer · Available for missions in the Lille region or remotely · Open to large accounts, scale-ups, and IT consulting firm contexts.

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Lille (up to 50km)

ADEO Services
Full-Stack Developer
September 2025 - Today (11 months)
Villeneuve-d'Ascq, France
I contributed to the evolution of supplier and employee portals for various Business Units of the group, within a complex and interconnected product environment, handling critical applications for business performance.

✅ Development of APIs in hexagonal architecture, micro frontends integrated into a multi-product ecosystem, implementation of Kafka event-based flows
✅ Lead on the technical and functional architecture of a project to create incident tickets directly within Adeo portals
✅ Resolution of major bugs, complex root cause analysis, improvement of overall product stability: 50% reduction in RUN tickets
✅ Implementation of an AI-based automatic release note generation script, aiming to standardize product communication
✅ Guarantee of consistency and user experience quality across different integrated products
Java Spring Boot Vue.js PostgreSQL Apache Kafka Hexagonal Architecture
Norauto
Full-Stack Developer
April 2024 - September 2025 (1 year and 5 months)
Villeneuve-d'Ascq, France
As part of a team of 8 developers, 1 Product Owner, and 1 Tech Lead, I contributed to the availability and presentation of the Norauto catalog (products, prices, stocks) in both B2C and B2B contexts.

✅ Development and maintenance of APIs exposing the group's catalog
✅ Creation of a shared error management library (reduction of RUN tickets)
✅ Addition of analytics to a tablet kiosk application to guide product decisions
✅ Refactoring of back-end services (hexagonal architecture, micro-services, Gherkin tests)
Java Spring Boot Elasticsearch Apache Kafka Hexagonal Architecture Docker