Senior Java Developer - E-Commerce + Accounting & Marketplaces - remote in EU

At p athway Solutions GmbH , we're on a mission to automate accounting for E-Commerce and SaaS companies. Our goal is to free 10,000 entrepreneurs from the burden of manual bookkeeping so they can focus on what they do best: growing their business. We are a fast-paced, fully remote company experiencing significant customer growth, and we're looking for passionate builders to join us. The Opportunity: own the domain of infrastructure We are looking for a highly motivated Senior Java Developer to join our team at Pathway. You will be responsible for the development and maintenance of our core application, specifically focusing on our billing and invoice generation systems. We need someone who is not only a strong coder but also proactive, eager to master new technologies, and capable of solving complex infrastructure and concurrency challenges. Tasks Application Development: Design, develop, and maintain robust billing applications and features (e.g., invoice generation systems) using Java 25. Concurrency & Performance: Architect and manage highly concurrent, multi-threaded application logic to ensure memory efficiency and system stability. Infrastructure & DevOps: Take ownership of infrastructure tasks, ensuring our systems are scalable, reliable, and well-maintained. Database Management: Utilize and optimize both SQL and NoSQL databases (e.g., Bigtable) to handle our evolving data requirements. Integrations: Design and maintain high-quality API integrations, utilizing modern