Senior Java Backend Engineer (Fintech)

TL;DR

Senior Java Backend Engineer (Fintech): Rebuilding a mission-critical SaaS platform for a essential industry with an accent on resilience, auditability, and performance at scale. Focus on designing event-driven services, modeling complex business rules, and integrating AI for anomaly detection and smart automation.

Location: Hybrid, up to 3 days/week remote; flexible hours.

Salary: €75.000–€90.000 depending on experience and impact.

Company

Utrecht-based product company, a trusted name for decades, is rebuilding their flagship platform from the ground up.

What you will do

• Design and build event-driven services with RabbitMQ, resilient messaging, retries, and observability.
• Model complex business rules, making trade-offs between strong and eventual consistency, ensuring idempotency, and handling large-scale transactions.
• API-first development: stable contract design, versioning, and secure integrations.
• Operate what you build: Docker-based delivery, AWS-native infrastructure, zero-downtime deployments, monitoring, and tracing at scale.
• Migrate functionality from legacy to the new platform using strangler approaches.
• Integrate AI into the platform for anomaly detection, optimizing data flows, or smart automation.

Requirements

• At least 5 years of experience in Java backend development.
• Experience with Java 11+ (preferably Java 17 or 21) and Spring Boot.
• Knowledge of cloud environments (AWS is a plus) and containerisation (Docker).
• Understanding of architecture design (microservices, event-driven etc.).
• Experience with CI/CD and test automation.
• Solid understanding of API-first design and security practices.

Nice to have

• Interest in AI applications.
• Experience in mentoring or coaching colleagues.
• Affinity with DDD and working within complex, rule-heavy domains.
• Experience with migration strategies, strangler patterns or mentoring.

Culture & Benefits

• Premium-free pension (100% employer contribution).
• 27 vacation days + travel allowance.
• Annual workation abroad.
• MacBook or Lenovo of your choice.
• Training budget & conference attendance; active internal knowledge sharing.
• Daily healthy office lunch.