Qu is looking for a Senior Software Engineer to join our Payments team. This role is central to building and maintaining high-performance, secure payment processing systems that power restaurant chains globally. You will work on scalable cloud services, ensuring reliability and security for millions of transactions. At Qu you will: • Design and develop scalable, secure, and reliable payment processing services. • Collaborate with cross-functional teams to integrate payment gateways and financial services. • Optimize system performance and troubleshoot complex issues in production environments. • Ensure PCI compliance and implement industry-standard security practices. What we're looking for: • 5+ years of software engineering experience with a focus on backend systems. • Strong proficiency in Java, Go, or Python. • Experience with cloud platforms like AWS or Google Cloud. • Solid understanding of microservices architecture and RESTful APIs. • Deep understanding of payment flows, including authorization, tokenization, settlement, and reconciliation, within secure, distributed backend architecture. • Strong knowledge of Payment Card Industry (PCI) considerations and experience in designing systems for secure handling of sensitive financial data, consistency, and auditability. Desired Qualifications: • Previous experience in fintech or payments industry. • Knowledge of Kubernetes and containerization. • Familiarity with SQL and NoSQL database technologies. • Background in restaurant, retail, or POS ecosystems and familiarity with store group hierarchies, check data, or tag-based filtering. • Familiarity with Azure DevOps tools, in conjunction with the Atlassian product suite (Jira, Confluence, Rovo, etc.)