Ingenieur Etudes et Developpement-Fullstack Developer Noyelles les Seclin 59 Fr H/F Worldline

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.