Senior Backend Engineer – Java & AI Platform

Location: Zwijnaarde, East Flanders, Belgium

Department: Platform Delivery - PLD

What you'll do...

• Build and evolve Java/Quarkus backend services and REST APIs that expose Miles business capabilities to our AI and automation platforms.
• Design reliable multi-step business workflows, including validation, transactional behaviour, error handling and recovery.
• Integrate Miles with our Agentic AI platform, Temporal and other enterprise systems.
• Turn complex business requirements into clean, maintainable and well-tested backend solutions.
• Work closely with Backend, AI and Workflow Engineers, Business Analysts and Test Automation Engineers to build new capabilities end-to-end.

What you bring...

• Strong professional experience building backend applications in Java.
• Solid experience designing and implementing REST APIs, microservices and enterprise integrations.
• Strong understanding of automated testing, including unit and integration testing.
• Experience building backend systems involving business rules, transactions and complex workflows.
• Experience or genuine interest in AI-assisted software engineering: at SOFICO, we actively encourage engineers to bring AI tools (e.g. Claude Code, GitHub Copilot) into every step of the product and software development lifecycle, from specification and planning through implementation and testing, and you should be eager to grow that practice with us

Earn bonus points for...

• Experience with Quarkus, Temporal, saga patterns or workflow orchestration.
• Experience with distributed systems or event-driven architectures.
• Experience building backend capabilities for AI, automation or machine-to-machine integrations.

• Competitive salary package;
• Meal allowance provided per working day;
• Company car or mobility budget
• Group and hospitalization insurance
• Hybrid working and flexible hours, giving you the freedom to shape your workday;
• A modern co-working space offering a comfortable working environment;
• From day one, you’ll be supported through a structured onboarding program, with guidance from a dedicated coach to help you get up to speed and grow in your role;
• And because strong teams go beyond day-to-day work, we regularly create opportunities to connect — from casual drinks to team activities and company-wide events.