Senior Software Engineer

Senior Software Engineer

Mechelen (Hybrid)

Every day, billions of financial transactions move through the banking system — and within that flow are fraud signals, compliance risks, and operational issues.

Vyntra helps banks understand and act on that data in real time.

We’re a global leader in transaction intelligence, trusted by over 130 financial institutions across 60+ countries. Our platform helps banks see, secure, and optimise transactions as they happen.

The role

We’re hiring a Senior Software Engineer to join our core Transaction Observability team in Mechelen. You’ll work in a small, autonomous scrum team building the engine that ingests, indexes, and makes large volumes of transaction data searchable in real time.

This is hands-on backend engineering at scale. You’ll design and build core features, optimise performance, and contribute to architectural decisions that directly impact global banks.

If you enjoy solving complex data problems and care about writing clean, efficient Java — you’ll feel at home here.

Stack: Java, Spring Boot, Elasticsearch, Gradle, Kubernetes/Helm

What you’ll do

• Design and build high-performance backend components in Java
• Work on real-time ingestion and indexing of large-scale data
• Develop advanced search capabilities using Elasticsearch
• Improve performance, scalability, and reliability
• Contribute to technical design and architecture decisions
• Write clean, well-tested, production-ready code

What we’re looking for

• Strong experience building backend systems in Java
• Solid understanding of software design and ability to own solutions end-to-end
• Experience working with scalable, high-throughput systems
• A product mindset — you think beyond the code

Nice to have

• Experience with Elasticsearch or Apache Lucene
• Background in fintech, regtech, or financial systems
• Experience working with real-time or high-volume data

Why Vyntra

Your work will run in production at some of the world’s largest financial institutions — this is not internal tooling. You’ll be working on real-time systems, processing large volumes of data, where performance and reliability matter.

The team is small and collaborative, with real ownership and the ability to influence technical decisions.

We use modern tooling and continuous delivery practices, so you can ship and see the impact of your work quickly.

📍 Mechelen (hybrid, office opposite the station)

🌍 International, English-speaking engineering team

🚗 Mobility budget or company car

📄 Permanent role

We welcome applications from candidates who have the right to work in Belgium. Visa sponsorship is not available for this role.