Java Developer -

You will join our dynamic team, contributing to the development and optimization of backend solutions supporting omni-channel and e-commerce platforms. You will work closely with engineers, architects, DevOps, and analysts to deliver high-quality solutions aligned with business needs and technology standards.

Your missions:

• Analyze business and technical requirements to design and develop robust backend solutions supporting omni-channel retail and order management processes
• Develop, test, debug, and deploy Java-based microservices, ensuring scalability, reliability, and performance
• Design and implement integrations with Order Management Systems and retail platforms, supporting key flows such as order orchestration, inventory visibility, fulfilment, returns, and payment flows
• Maintain and improve existing services, ensuring high code quality, maintainability, and reliability
• Troubleshoot and resolve software defects, integration issues, and performance bottlenecks
• Collaborate with the Support team to investigate and resolve production incidents related to omni-retail and order management services
• Work with the DevOps team to implement and improve CI/CD pipelines, automation, and deployment processes
• Review functional specifications and translate them into scalable and maintainable technical solutions

• Experience as a Java Software Engineer, with strong expertise in Java and the Spring ecosystem (Spring Boot, Spring Data JPA, Hibernate, Spring Cloud)
• Experience developing microservices-based solutions using event-driven architectures and API-first principles
• Experience designing and implementing RESTful APIs (OpenAPI/Swagger) and working with JSON, XML, HTTP, and GraphQL
• Experience building omni-retail and e-commerce solutions, including order lifecycle, inventory visibility, fulfilment, returns, payment flows
• Proficiency with databases such as MySQL and MongoDB
• Hands-on experience with containerized and cloud-native environments, including Docker, Kubernetes, and CI/CD pipelines (GitLab)
• Experience working with event messaging systems and integration patterns (e.g., AWS SQS, Solace, Pub/Sub architectures)
• Familiarity with security best practices including OAuth2, OIDC, and IAM solutions such as Keycloak and Okta
• Experience with modern development and testing tooling, including IntelliJ, SonarQube, Datadog, Insomnia, and the Atlassian suite (Jira, Confluence)
• Bachelor’s or master’s degree in computer science, Software Engineering, or a related field
• English fluent. French is a plus.
• You demonstrate strong problem-solving and analytical skills
• You demonstrate excellent communication and the ability to work with multinational, cross-functional teams
• You are proactive, self-driven, and eager to learn new technologies
• You can work independently in a fast-paced Agile environment

What we offer:

• An international community bringing together 110+ different nationalities
• An environment where trust has a central place: 70% of our key leaders started their careers at the first level of responsibilities
• A robust training system with our internal Academy and 250+ available modules
• A vibrant workplace that frequently gathers for internal events (afterworks, team buildings, etc.)
• At Mantu, sustainability is part of everything we do. You’ll have the opportunity to turn your ideas into action and make a tangible impact. Every day, our teams bring our ESG commitments to life, from reducing our footprint to driving positive change within our communities. Through our WeCare Together program, you’ll be empowered to design and lead projects that create real social or environmental impact, with the company’s full support.
• Remote policy: Possibility to work fully remotely