3-4 years of experience building backend or full-stack web applications, including at least 2 years working with Kotlin in a commercial setup Some experience with frontend development with JavaScript/Typescript and any modern framework (React.js, Vue.js, Angular) Willingness to work with PHP when needed Strong object-oriented programming skills with a focus on clean architecture and maintainable design Solid experience working with relational databases Hands-on experience with automated testing (unit, integration, component or UI) Hands-on experience deploying applications to production environments using CI/CD pipelines Clear written and spoken English communication skills A collaborative, team-first mindset Containerization and orchestration tools such as Docker and k8s Familiarity with event-driven architectures and messaging systems (e.g., Kafka) Exposure to AWS or other cloud platforms

As a Full-stack Engineer with a strong backend focus (Kotlin) you will help us build the future of payments for green and smart mobility. You’ll join our Payments Team - the heart of our checkout experience - as part of our Demand Division. Your work will directly impact how millions of people pay, how quickly their transactions are processed, and how much revenue we generate. We continuously work to improve payment authorization and conversion rates, increase payment efficiency and revenue protection, and ensure data reliability. At the same time, we’re integrating local payment methods across different markets and tackling complex engineering challenges along the way. About the Role Build the systems that move money fast, safely, and at scale Design and ship features used by millions of users Write clean, tested, production-ready code Own features from idea to release Work closely with business, UX, frontend, and backend engineers Review code, pair program, and ship often Improve existing systems and clean up legacy code