Senior Java Software Engineer (Remote - Colombia) - CO121-DV

OKTO PAYMENTS' continuous growth demands high-caliber candidates who embody professionalism, passion, and creativity. For those who join us, we offer significant career advancement, stimulating challenges, and a clear runway for growth. OKTO PAYMENTS is the next-generation Payment Service Provider - AI-native, precision-engineered, and relentlessly merchant-obsessed. Built for merchants operating in the most complex and demanding eCommerce sectors, our platform goes far beyond transaction processing. We solve for scale, compliance, and performance with one unshakable focus: delivering outcomes that power merchant growth. From payments and banking to treasury and settlement, we engineer the financial infrastructure that gives our partners a competitive edge. The result? Faster onboarding, smarter operations, and resilient, real-time performance. At OKTO PAYMENTS, we enable merchants to Play Differently, transforming payments from routine transactions into true differentiators that deliver personalized, frictionless experiences. Our AI-native innovation harnesses data and insight to power every decision, while our proprietary in-house engineering ensures precision and control. Combined with deep, trust-based relationships worldwide, we’re redefining what it means to build, scale, and win in complex digital commerce. Summary As a Senior Software Engineer, you will play a key role in designing, developing, and maintaining our next-generation payment platform. This position requires strong hands-on experience with distributed systems, Java-based microservices, and high-volume transaction processing. You will be responsible for building scalable, secure, and reliable software solutions while collaborating closely with product, infrastructure, security, and other engineering teams. Key Responsibilities 1. Software Development Design, architect, and develop backend software solutions for high-volume payment processing. Create and maintain high-quality, optimized code with robust unit tests and appropriate test coverage. Develop scalable, secure, and reliable software solutions using Java and Spring technologies. Contribute to the evolution of the payment platform and its underlying architecture. 2. Software Architecture & Distributed Systems Lead the design and architecture of complex distributed systems that handle real-time financial transactions at scale. Take a lead role in the transition to a microservices-based architecture for payments. Design and implement solutions based on Event-Driven Software Design Patterns. Ensure systems meet high standards of scalability, security, and reliability. 3. Payments & Integrations Lead the integration of payment gateways, banks, card networks, and alternative payment methods. Work with payment flows, settlement, reconciliation, and fraud detection mechanisms. Contribute to the development of solutions supporting high-volume financial transactions. 4. APIs & Security Design and…