Application Engineer II - Data Intelligence Products

Responsibilities

• What you'll ship
• Transform internal data into customer-facing products - shifting focus from internal operations to merchant-facing utilities that drive real business outcomes
• Build and launch features within Mollie's Insights product and expand into payment conversion optimisation, applying data-intensive engineering to core payment systems
• Design and deliver reliable, performant architectures capable of operating at high scale and high transaction intensity
• Contribute to the foundational platform that powers Mollie's data intelligence offering across fraud protection, benchmarking, and analytics
• Collaborate with engineers, product managers, and senior leadership to shape the product as you build it - from idea through to production

Requirements

• 5+ years of experience developing large-scale backend applications, with strong proficiency in Java (primary requirement); experience with PHP, Go, C#, or Python is also valued
• Proven experience designing systems that handle queuing, caching, concurrency, fault tolerance, and scalability in high-volume, high-intensity environments
• Experience working with data-intensive systems, ML infrastructure, or analytics platforms - you don't need to build models, but you understand data and how to engineer around it
• A product-first mindset - you think in terms of merchant outcomes like conversion, revenue, and protection, not just technical elegance
• Excellent communication skills and the ability to work effectively across engineering, product, and business stakeholders in a fast-moving, entrepreneurial environment
• An Always Be Shipping mentality - consistently delivering value where speed and quality go hand in hand
• Grow your way
• At Mollie, growth is personal. We believe everyone should have the chance to develop their skills, explore new challenges and shape their career on their own terms.
• You'll get regular feedback and performance reviews to support your development, with fair and transparent salary reviews along the way. Many Mollies move into new roles or take on new projects to stretch themselves, and we actively hire from within to help you take the next step.
• No matter if you're aiming for promotion, exploring a different career path or building new skills, you'll be supported with the tools, trust and opportunities to grow your way.
• Unlock your full potential and join us to eliminate financial bureaucracy. If you're excited by the idea of building what's next, for yourself and for thousands of businesses across Europe, we'd love to hear from you. Apply with your CV (in English) using the form below.
• Want a peek behind the scenes? Check out what life at Mollie is really like.
• AI at Mollie
• We believe in Always Be Shipping, and AI brings that philosophy to life across every team, every role, every day.
• AI is core to how we build. It helps us move faster, simplify work and make smarter decisions, creating real impact for the businesses we serve. We're looking for people who are excited to use AI to shape the future of finance with us.

Additional Information

Build with us Since 2004, we've had one clear goal: to make payments and money management effortless for every business in Europe. Today, more than 300,000 companies use Mollie to get paid, manage money and grow - with products designed to be simple, scalable, and dependable. With 950+ Mollies across 14+ locations, we care deeply about autonomy and craft. So we work in small teams, with real ownership, and we trust you to make the right decisions. We're building for the long term, so we provide the tools you need, processes you can rely on, and a balanced work environment to help you do work you're proud of. Sound like your kind of place? Let's build together.

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