Senior Software Engineer - Transaction Observability Platform

Senior Software Engineer – Transaction Observability Platform

Every day, billions of financial transactions move through the world's banking system. Fraud hides in that data. Compliance failures lurk in it. Operational risks surface in it — often too late.

Vyntra exists to change that.

We're a global leader in real-time transaction intelligence, trusted by over 130 financial institutions across 60+ countries — from retail and private banks to Central Securities Depositories. Our platform gives banks the power to see, secure, and optimise every transaction as it happens.

The work is consequential. The technology is genuinely hard. And we're looking for an engineer who wants both.

The Role

We're hiring a Senior Software Engineer to join our Transaction Observability product team — the engineering heart of a platform that centralises and makes searchable billions of financial messages in real time.

You'll work in a small, autonomous scrum team where ownership is real and decisions matter. This isn't a cog-in-the-machine role: you'll design and build core features, take on complex data engineering challenges, and have genuine influence over how the platform evolves.

If you care about writing high-quality Java, enjoy working at serious scale, and want your work to have a direct impact on financial crime prevention and operational resilience at major global institutions — this is worth reading on.

What You'll Do

• Design, develop, and optimise core features of our enterprise-grade transaction observability platform
• Tackle complex challenges in large-scale, real-time data ingestion, indexing, and search
• Build performant, high-quality components using advanced search engine technology (Elasticsearch / Apache Lucene)
• Collaborate closely with your scrum team to deliver meaningful product improvements with measurable customer impact
• Take ownership of technical decisions and contribute to architectural thinking across the platform
• Write clean, well-tested code and contribute to the engineering standards that the whole team lives by

About You

You're a well-rounded software engineer with deep Java expertise — someone who writes code that performs under pressure and holds up over time. You think beyond your ticket, care about the product you're building, and bring the same rigour to a design discussion as you do to a pull request.

You'll need:

• Strong, demonstrable Java experience (Java 11+ preferred) with a track record of building high-performance, production-grade systems
• Solid understanding of software design principles and the ability to own technical decisions end-to-end
• Experience working in agile environments, with clear communication and a collaborative team mindset
• A product-minded approach — you think about the customer, not just the code
• The right to work in Belgium — we're unable to sponsor visas for this role

You'll stand out if you have:

• Hands-on experience with Elasticsearch or Apache Lucene — given the nature of our platform, this is genuinely valuable
• Experience with high-volume, real-time data processing systems
• Familiarity with financial messaging formats or the fintech / regtech space

The Environment

Our team is based in Mechelen and we work in a hybrid model — three days a week in the office, two from home. We're right across the road from Mechelen station, which makes the commute as straightforward as it gets.

We're an international team and English is the working language. You'll also need French or Dutch to get the most out of day-to-day life here — we'd consider an exceptional candidate who's working on it, but it's important to be upfront that you'll struggle without one or the other.

Why Vyntra?

We're a company at an exciting inflection point — recognised as a Category Leader in our space, serving some of the world's most important financial institutions, and with a lot still to build.

You'll have real autonomy, be surrounded by people who care about their craft, and work on problems where the engineering complexity and the real-world stakes are both genuinely high.

The work you ship will be used by banks and institutions that millions of people depend on.

We welcome applications from strong candidates who have the right to work in Belgium. No visa sponsorship is available for this role.