Software Development Engineer

Let’s shape the future of finance - together

At Isabel, we believe that real innovation happens when people and ideas connect 

That’s why we’re building more than technology, we’re building an ecosystem. 

One where every voice counts, and where your work can truly make a difference. 

We’re looking for curious minds and collaborative builders. People who believe success means growing together, learning from each other, and challenging the status quo.

If that sounds like you, keep reading. 

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

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.

What you’ll do

• 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.

What makes you a great fit 

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.

Must Have Expertise

• 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 Tech we use

Java (8 – 21) - Spring Framework - Oracle DB - Gitlab - Jenkins - IntelliJ - Ansible - WebSphere - Kustomize - OpenShift

Why join us

At Isabel, we offer more than a job, we offer a place to grow, contribute, and thrive. 

• A human-sized Belgian company (250 people) where your ideas and impact matter 

• 50% hybrid work, flexible hours, and autonomy to manage your time 

• Coaching, training, and tailored development paths for every career stage 

• A flat, collaborative structure with real ownership and cross-functional work 

• Competitive rewards: Flex Income Plan, annual bonus, insurance, meal vouchers 

• A strong engagement culture and inclusive mindset 

• Easy mobility options: our MOBI strategy supports flexible, low-footprint commuting, whether by bike, public transport, or electric car

• Professional gatherings that encourage collaboration and networking, as well as fun and purposeful activities led by our BeFun team

• A certified Top Employer with 30 years of tech leadership and ambition 

Ready to join us? 

Your voice, your vision, and your impact all have a place here. 

Let’s shape smarter solutions and a stronger digital economy. Together.