Senior Full Stack Developer - GEN AI - Finance Sector - Leuven

Our client is looking for an experienced Senior Full Stack Developer to join a multidisciplinary product team responsible for developing and enhancing a leading digital assistant platform used by customers across a large-scale enterprise environment.

You will work within an Agile "Use Case Team", contributing to the design, development, and expansion of AI-driven conversational solutions. The team continuously introduces new capabilities and customer-facing functionalities, leveraging modern software engineering practices, cloud-native architectures, and Generative AI technologies.

This role offers the opportunity to work on innovative AI and chatbot initiatives, ranging from incremental product improvements to large-scale strategic developments., As a Senior Full Stack Developer, you will:

• Design, develop, and maintain full-stack applications from frontend to backend.
• Create scalable web architectures and responsive user experiences.
• Develop and maintain backend services, APIs, databases, and integrations.
• Design and implement RESTful APIs and microservice-driven solutions.
• Translate functional requirements into robust technical designs.
• Ensure high-quality, maintainable, and secure code through best development practices.
• Participate in the complete software lifecycle, from analysis and design through deployment and support.
• Contribute to AI-driven solutions, chatbot capabilities, and conversational experiences.
• Leverage AI agents and agentic workflows to improve automation and development efficiency.
• Collaborate closely with Product Owners, Scrum Masters, developers, and other stakeholders.
• Support the evolution of existing solutions through continuous improvement and innovation.

Technical Environment

Backend Development

• Python
• Java (Spring Boot preferred)
• REST APIs
• Cloud-native application development
• Microservices architecture
• Backend system integrations

AI & Emerging Technologies

• Generative AI (GenAI)
• Large Language Models (LLMs)
• AI agents and agentic workflows
• Conversational AI and chatbot development

Development & DevOps

• Git (GitHub / BitBucket)
• CI/CD pipelines
• Continuous Integration & Continuous Delivery principles

Nice-to-Have Technologies

• Docker
• Kubernetes
• Podman
• AWS tooling and cloud services
• AWS CI/CD tooling

• Minimum 5 years of professional software development experience.
• Proven experience as a Full Stack Developer in enterprise environments.
• Strong experience with Python development.
• Experience with Java development (Spring Boot preferred).
• Experience designing and integrating APIs and backend systems.
• Experience working with LLMs and Generative AI solutions.
• Good understanding of cloud-native architectures and RESTful services.
• Experience with version control systems and modern development workflows., * Strong analytical and problem-solving skills.
• Ownership and accountability for delivered solutions.
• Ability to work independently while contributing effectively within a team.
• Proactive and creative mindset.
• Strong communication and collaboration skills.
• Ability to manage multiple initiatives simultaneously.
• Eagerness to learn and explore new technologies.
• Results-oriented attitude.
• Adaptability and flexibility in a fast-changing environment.
• Experience working within Agile/Scrum teams.

Work Environment

• Hybrid working model.
• Candidates must be locally available in Belgium.
• On-site presence is required approximately 50% of the time.
• Regular collaboration is expected across multiple office locations.