Summary: Join a FinTech leader as a Backend Developer to design, develop, and maintain software features within a microservice architecture, focusing on secure payment solutions. Highlights: 1. Design and develop new software features within a microservice architecture 2. Work on payment method integrations with platforms like PayPal and Klarna 3. Implement secure data handling and robust encryption standards MultiSafepay is a leading payment service provider, offering omnichannel and advanced payment solutions to businesses across Europe. We are innovative and fast\-growing, building powerful solutions that transform the way our clients do business. We focus on delivering real solutions to their challenges and always stay ahead of the curve. In short, we are a true FinTech. We're on a mission to make payments simple, secure, and accessible for every business. With powerful in\-house technology and deep expertise, our modular platform brings online, in\-person, and cross\-border payments together in one place — giving merchants the flexibility to scale on their own terms. Through a partnership\-first approach, we tackle complexity head\-on, keep payments running smoothly, and boost success rates. It's how we level the playing field for businesses of all sizes and ambitions. **About the role** Our Technology team is organized into multiple specialized departments including Backend, Frontend, Plugins, Verticals, and DBA \& Reporting. The Backend team operates within a microservice architecture, working with sensitive financial data and delivering production\-grade code that meets strict quality and security requirements. We are looking for a Backend Developer to join this team. In this role, you will design and develop new software features while continuously maintaining, improving, and refactoring legacy code to ensure long\-term stability and performance. You will work on payment method integrations including platforms such as PayPal and Klarna, credit card processing, and bank transfer solutions, implementing secure data handling practices and robust encryption standards to ensure seamless, secure, and scalable transaction processing. **What you'll be doing:** * Designing and developing new software features within a microservice architecture, delivering highly reliable production\-grade code * Maintaining and resolving production issues to ensure system stability and uptime * Refactoring legacy code to improve performance, maintainability, and long\-term stability * Contributing to both new and existing payment method integrations including platforms such as PayPal and Klarna, as well as credit card processing and bank transfer solutions * Implementing secure data handling practices and robust encryption standards when working with sensitive financial data **What you'll need:** * 3\+ years of experience in backend development * Strong proficiency in Perl or Java * Solid experience with PostgreSQL and Elasticsearch * A clean architecture mindset with a focus on building maintainable, scalable systems * Strong soft skills including communication, collaboration, and problem\-solving abilities * Fluency in English **Nice to have:** * A team player mindset with experience collaborating in cross\-functional teams * Experience with Domain\-Driven Design (DDD) * Experience with Test\-Driven Development (TDD) **What you'll get from us:** * A competitive salary and benefits package * Opportunities for professional growth * A diverse role within a dedicated international team of enthusiastic colleagues * Office with an amazing view of the beach * Health insurance * Free Spanish classes and optional afterwork sports activities