Backend Staff Engineer

About DEUNA 🧡 DEUNA is a rapidly growing startup revolutionizing global commerce with ATHIA, our AI-powered orchestration and payments platform that helps large enterprises boost approval rates, reduce costs, and unlock new revenue. Built by the team behind DEUNA—the fastest-growing Commerce OS in Latin America—ATHIA combines payment intelligence, checkout optimization, and data orchestration in one powerful solution. With deep integrations across 300+ PSPs and alternative payment methods, and over 20% of Mexico’s digital economy running through our platform, we simplify global payments through a single integration and centralized reconciliation. We are a rapidly growing startup expanding into the U.S. to meet the urgent needs of large retailers, marketplaces, airlines, and QSRs. Join us to shape the future of payments! 🚀 Visit https://www.deuna.com/ to learn more about us! Role Overview We are looking for a Backend Staff Engineer to lead the design and development of scalable backend systems. This role is focused on building high-quality, reliable services, improving system performance, and guiding engineering teams through technical decisions. You will work closely with Engineering Managers and Product teams to deliver robust backend solutions. Key Responsibilities Backend Development & Architecture Design, build, and maintain backend services and APIs. Develop scalable and secure distributed systems. Define and implement best practices for performance and reliability. Technical Leadership Provide technical guidance to engineering teams. Participate in architecture discussions and design decisions. Improve development standards and documentation. System Optimization Identify and resolve performance bottlenecks. Implement improvements in scalability, monitoring, and reliability. Design data models, caching strategies, and asynchronous processes. Collaboration Work closely with Product and Engineering teams. Support the delivery of new features and system improvements. Ensure alignment between technical solutions and business needs. Requirements 8+ years of experience in backend development. Strong experience with: Golang and/or Python Experience working with: Distributed systems REST or GraphQL APIs Event-driven architectures Experience with AWS or similar cloud platforms. Knowledge of: SQL and NoSQL databases Caching (Redis or similar) Messaging systems Understanding of security best practices. Strong problem-solving skills. Good communication skills. English is a plus. Nice to Have Experience in fintech, payments, or e-commerce platforms. Experience with high-traffic systems. Knowledge of compliance and security standards.