Mollie was founded in 2004 in Amsterdam. Since then, Mollie has grown exponentially and has become a trusted payment service provider for over 130,000 merchants and counting. With over 50 nationalities working together from all over the world, Mollie is a diverse and dynamic company. With a workforce of over 800 Mollies spread across the Netherlands, Germany, Belgium, France, the UK, Portugal and Italy the company continues to deliver innovative and reliable payment solutions to businesses across Europe.
The company challenges and supports its employees to become better , offering growth opportunities, listening to ideas, and rewarding fairly. Mollie embraces uniqueness, encourages a sense of belonging, and fosters a fun environment. Be Bold, Be Loved, Be Authentic are our core values.
Mollie is seeking a passionate and driven Senior Software Engineer to join our newly formed Onboarding Activation team. This team is dedicated to supercharging our customer acquisition and activation efforts by building solutions that enhance the onboarding experience and drive product adoption.
This role sits at the intersection of product, marketing, and engineering, shaping the customer experience across multiple Mollie products. You’ll work directly with designers, marketers, and data analysts to identify opportunities and bring solutions to life. We value creative problem-solving and empower you to contribute to feature design and development.

WHAT YOU BRING

• Strong backend development experience: You have at least 4 years of experience developing web applications, preferably with PHP or Java. Experience with other languages React is a plus.
• Product mindset: You are passionate about building products that solve real user problems and have a strong understanding of user experience principles.
• Strong communication and collaboration skills: You are able to effectively communicate your ideas and technical solutions to both technical and non-technical audiences. You are also a strong team player and enjoy working in a collaborative environment.
• Data-driven approach: You are comfortable working with data and using it to inform your decisions and improve your work.
• Passion for learning and growth: You are eager to learn new technologies and are always looking for ways to improve your skills.

WHAT YOU’LL DO

• Build and maintain robust and scalable backend systems: You’ll be working primarily with PHP, but experience with Java and React is a plus. You’ll be responsible for designing, developing, and deploying APIs and other backend components that support our marketing automation platform.
• Implement and optimise marketing automation workflows: You’ll work closely with the Growth Marketer to implement and optimise automated email campaigns, in-app messaging, and other marketing automation initiatives. You’ll ensure these workflows are efficient, reliable, and deliver the desired results.
• Conduct A/B testing and data analysis: You’ll help design and conduct A/B tests to measure the impact of new features and improvements. You’ll partner with our data analysts to identify areas for optimization and improvement.
• Develop user-facing features: You’ll collaborate with marketers, engineers, and designers to translate user needs into functional and engaging features that improve the onboarding experience and drive product adoption. You’ll be working with React and TypeScript to build interactive and user-friendly interfaces.
• Collaborate with cross-functional teams: You’ll work closely with product managers, designers, marketers, and other engineers to ensure your work aligns with the overall product strategy and business goals.