Senior Java Backend Engineer – Digital Platforms & Integration

Our client is looking for a professional to design and evolve the backend foundations of a next-generation digital platform. The project involves building scalable APIs and Backend-for-Frontend capabilities to bridge digital channels and enterprise systems.

• Design, develop, and maintain platform APIs, backend services, and integration components.
• Build scalable and maintainable Backend-for-Frontend (BFF) services to support multiple digital channels.
• Contribute to the evolution of the integration layer between digital platforms and partner ecosystems.
• Implement security protocols and authentication mechanisms including OAuth2 and JWT.
• Define API lifecycle management and versioning strategies to ensure consistency and reliability.
• Apply software engineering best practices and participate in code reviews and architecture design.

• 8+ years backend development with Java and Spring Framework.
• 8+ years experience with Object Oriented design and architectural patterns.
• 5+ years working in an IBM Environment utilizing IBM MQ Series.
• 5+ years of experience in Quality Assurance and Software Testing.
• 5+ years with Web Services, REST APIs, and API lifecycle management.
• You bring expertise in Backend-for-Frontend (BFF) and cloud-based distributed architectures.
• You possess knowledge of security standards such as OAuth2, OpenID Connect, and JWT.
• You have experience in Agile workflows and design support tools such as SPARX.
• You're proactive, analytical, and comfortable challenging technical decisions constructively.
• You are fluent in English with professional proficiency in French or Dutch.

Nice to Haves

• Knowledge of monitoring, observability, and operational practices.
• Experience participating in architecture spikes and MVP development.

• Start date: ASAP
• Duration: 6 months
• Work regime: Full-time
• Location: Anderlecht
• Working model: Hybrid (minimum 2 days/week onsite)
• Contract: open to both permanent employees and freelancers