Publiée 20 juin 2026
INGENIEUR ETUDES ET DEVELOPPEMENT-Fullstack Developer
Worldline
Seclin, Hauts-de-France 59113, France
CDI
INGENIEUR ETUDES ET DEVELOPPEMENT-Fullstack Developer
Magellan is a Management Consulting and Technology Group. Our mission is to support SMEs, mid-caps, large corporations and public organizations throughout their strategic, technological and operational transformations.
The opportunity
Multi-agent architectures are no longer science fiction: they already handle millions of customer interactions (voice, email, chat, social media), automatically processing simple cases and intelligently escalating complex ones to human advisors.
In this fast-moving environment, We are expanding our Agentic AI platform to fully integrate voice, chat, and orchestration capabilities into our CCaaS solution. The ambition is clear: build a truly unified, AI-native contact center that elevates both customer experience and agent productivity, while positioning us at the forefront of the next wave of customer engagement.
Day-to-day responsibilities
Who are we looking for
We are looking for people capable of driving positive change, moving forward, and showing the way - passionate individuals with a positive attitude and a thirst to learn and progress. In practice, this means:
Perks & Benefits
Vous bénéficierez d'un large panel d'avantages, notamment :
VISION IN ACTION:
We help companies and public organizations to: Define the operating, business and technological models that will respond to the changes in their sector and activity in the long term Implement new business and IT organisations & their associated processes Deploy or create the technologies best suited to their new strategic and organizational plan, Secure and operate their applications and systems over time.
Information at a Glance
Magellan is a Management Consulting and Technology Group. Our mission is to support SMEs, mid-caps, large corporations and public organizations throughout their strategic, technological and operational transformations.
The opportunity
Multi-agent architectures are no longer science fiction: they already handle millions of customer interactions (voice, email, chat, social media), automatically processing simple cases and intelligently escalating complex ones to human advisors.
In this fast-moving environment, We are expanding our Agentic AI platform to fully integrate voice, chat, and orchestration capabilities into our CCaaS solution. The ambition is clear: build a truly unified, AI-native contact center that elevates both customer experience and agent productivity, while positioning us at the forefront of the next wave of customer engagement.
Day-to-day responsibilities
- You contribute to the full development and maintenance lifecycle of our Agentic Platform, actively participating in project delivery phases.
- You specify, design, and develop APIs and Web services, while writing and maintaining robust unit and functional tests.
- You identify, challenge, and analyze both functional and technical requirements to deliver value-driven solutions.
- You work on a microservices-based architecture deployed on our Sovereign Cloud or on the Google Cloud Platform, leveraging a modern and diverse tech stack - Java/ Kotlin, Angular, Spring, Docker, Kubernetes, and more - within a cutting-edge engineering environment built on Clean Architecture, design patterns, and dependency injection.
- You apply engineering best practices: code reviews, merge requests, automated testing, and continuous integration (GitLab CI).
- You build and extend the harness of our AI Agent, enhancing state-of-the-art LLMs with custom capabilities (connectors, RAG) to deliver high-quality support powered by internal knowledge base.
- You drive continuous improvement of our processes through an SRE-oriented approach, industrializing and scaling the solution.
Who are we looking for
We are looking for people capable of driving positive change, moving forward, and showing the way - passionate individuals with a positive attitude and a thirst to learn and progress. In practice, this means:
- You have a global vision and end-to-end technical understanding of an IT service: application, underlying infrastructure, and related dependencies.
- You have solid knowledge of Cloud computing and a strong sensitivity to DevOps and FinOps practices.
- You have hands-on experience with Agentic technologies, prompt engineering, or harness engineering.
- You demonstrate initiative, proactivity, rigor, and autonomy within your area of responsibility.
- You are curious and value teamwork and customer service.
- You are motivated and passionate about the Agentic revolution.
- You thrive in a diverse and challenging technical environment.
- You are fluent in spoken and written English.
Perks & Benefits
Vous bénéficierez d'un large panel d'avantages, notamment :
- Primes annuelles (fin d'année, vacances, participation et intéressement)
- 32 jours de congés payés
- Prise en charge transport en commun à hauteur de 50%
- Comité d'entreprise très actif (Soirées, Voyages, Subventions culture et loisirs ...)
- Participer à des évènements sportifs (Corporate Games, courses, ...)
- Accord de télétravail
- Restaurant d'entreprise subventionné
- Mutuelle et prévoyance
VISION IN ACTION:
We help companies and public organizations to: Define the operating, business and technological models that will respond to the changes in their sector and activity in the long term Implement new business and IT organisations & their associated processes Deploy or create the technologies best suited to their new strategic and organizational plan, Secure and operate their applications and systems over time.
Information at a Glance
