Software Development Engineer (Senior)

Isabel's technical landscape has evolved significantly, bringing exciting challenges for those who thrive on innovation.

We are looking for a Senior Developer who not only understands the theory and design patterns behind modern software architecture, but also knows how to apply them pragmatically—always keeping an eye on ROI and real-world impact. Just as important, we’re seeking someone who brings enthusiasm and energy in a collaborative way, inspiring and supporting their teammates while driving projects forward.

One of our key strategic initiatives is improving the software delivery performance of our Multibanking solution. To achieve this, we are investing in component coupling and cohesion, breaking down monolithic applications into well-defined domains using hexagonal architecture. This requires a thoughtful approach - balancing long-term maintainability with short-term business value - while working closely with colleagues to ensure smooth integration and knowledge sharing.

If you thrive on tackling complex technical challenges, shaping a forward-thinking technical roadmap, and bringing a positive, team-oriented mindset, we’d love to meet you. You could be the next valuable addition to our team.

• Write high-quality, clean, and maintainable code following best practices and coding standards.

• Refactor and improve existing codebases, ensuring long-term sustainability and minimizing technical debt.

• Apply design patterns and architectural principles to create robust, scalable, and testable software solutions.

• Advocate for test-driven development (TDD) and automated testing to ensure software reliability and performance.

• Actively participate in code reviews, providing constructive feedback and fostering a culture of learning and improvement.

• Encourage a DevOps mindset, focusing on CI/CD, observability, and automation to streamline software delivery.

• Engage actively with all relevant parties to gather comprehensive requirements — encompassing user, technical, and performance specifications — and synthesize these into unified solution designs.

• Champion your proposals, striving to achieve excellence in fulfilling stakeholders’ needs and maximizing the value of project outcomes.

• Where necessary, validate the practicality of proposed solution designs through the development of proof-of-concept work.

• Ensure that the proposed solutions are aligned with the overarching technology strategy and comply with corporate governance standards.

• Cultivate a practice of thorough documentation, guaranteeing that it is a true and clear reflection of active operations and is readily understandable and available to stakeholders.

• Mentor and support team members, sharing knowledge and fostering a culture of craftsmanship and technical excellence.

• Engage in continuous learning and self-improvement, staying up to date with industry trends, new technologies, and best practices.

• Report regularly to the initiative lead, providing updates on progress, challenges, and solutions. Ensure clear and transparent communication regarding timelines, deliverables, and any potential risks to project success.

Soft Skills

• Ability to think strategically but balance the strategic with tactical goals: Must have the ability to see the "big picture" and plan accordingly. You need to anticipate future challenges and opportunities, aligning IT architecture with business goals. At the same time, you need to balance this with more tactical goals and immediate needs.

• You Must be able to effectively communicate complex technical concepts to non-technical people and work with various departments to understand their needs and constraints.

• Whether it's Agile, Scrum, Waterfall, or DevOps. You must be flexible and pragmatic in applying the best practices from these frameworks to suit the unique needs of the project, ensuring the architecture’s effectiveness and the team’s efficiency.

• Must be adept at solving complex problems, often requiring innovative solutions. You need to be adaptable, able to learn and apply new technologies, and make decisions that balance immediate needs with long-term strategy.

• Professional proficiency in English AND Dutch or English AND French.

Some of the technologies being used

• Java 8 – 21

• Spring Framework

• Oracle DB

• Gitlab

• Jenkins

• IntelliJ

• Ansible

• WebSphere

• Kustomize

• OpenShift

What kind of company would you be joining?

Isabel's products – Isabel 6 (multi-bank payment platform), Ponto (open banking), Kube (verified corporate data) and IntelliSuite (fraud monitoring) – enable seamless, secure, and reliable data and money flows. Trusted by more than 50,000 companies to access a network of more than 2,000 banks, Isabel processes more than 2,300 billion euros annually and the company will celebrate its 30th anniversary in 2025.

At the heart of the Isabel brand lies a distinctive commitment to unify the banking sector, software providers and our customers to build community-powered banking solutions. Isabel is a Belgian regulated company, headquartered in Brussels and acting under the supervision of the National Bank of Belgium, and focuses primarily on the Benelux market. At Isabel, we want to be the cornerstone of trust in an era defined by rapid technological advancement and, as such, contribute to a stronger, more efficient, and secure digital economy.

To keep up with what we are doing at Isabel, visit our website or our LinkedIn page.

You absolutely deserve this

• Flex Income Plan: you have a say in your salary package; you choose the benefits that suit you best

• Laptop, phone and subscription, group and health insurance, and meal vouchers

• An annual corporate bonus

• By train, bus, electric car or bike; we fix the right compensation

• We’d love to see you at least two days in the office. You don’t want to miss fresh fruit and chair massages, do you? That – and more - is our BeFun!

• We invest in your personal growth by training and coaching

• You work with experienced (fin)tech leaders and solid software tools

• A certified Top Employer bringing together hundreds of driven colleagues