We are seeking an exceptionally skilled, senior-level Senior Software Engineer for a strictly backend-focused role. Front-end-heavy candidates are not the target profile for this position. This role requires an expert engineer who can drive backend engineering initiatives for large-scale, complex applications. You will serve as a technical anchor, providing architectural direction and cross-domain troubleshooting expertise to ensure the successful delivery of highly scalable, distributed, cloud-native backend systems. Requirements & Qualifications (Must Have) • Expert-level Java programming experience, including hands-on development of testable code, a clear understanding of the SDLC, and the ability to write efficient unit test cases and automation test scripts. • Microservices experience with a strong backend focus. • Backend systems experience, including work on large-scale, complex applications. • Experience in the payments industry or building payment applications. • Distributed systems and scalable application development experience, including cloud-native applications, algorithms, logging frameworks, scaling, and UML principles. • Expert in SOAP/REST communication and the usage of test harnesses. • Experience working with and possessing knowledge of merge methodologies using version control systems like Git, GitLab, and BitBucket. • Familiarity or experience with test automation frameworks (such as Cypress.io, TestRail, Selenium, and Jenkins) as applied within a backend or full-cycle engineering context. Desirable Skills (Nice to Have) • AI experience. • Risk and compliance experience. • Database management and data migration experience, including work with specific database technologies like Oracle, RDS, and DynamoDB. • Cloud platform experience with AWS, Azure, or GCP. Interview Process • Two interview rounds are planned, with at least one live, shared-screen coding assessment. Major Duties & Responsibilities • Technical Direction & Architecture: Lead and give technical direction to fellow engineers while authoring extensive architecture and design documents utilizing distributed system design, algorithms, logging frameworks, scaling, and microservices principles. • Backend Code Development: Write high-quality, testable, expert-level Java code within a backend-focused full-cycle engineering framework, maintaining a clear understanding of the complete SDLC. • Cloud & Payments Application Engineering: Design, build, and deploy scalable cloud-native applications inside public cloud infrastructures, specifically optimizing core backend infrastructure for the payments industry. • Database & Migration Management: Administer and integrate applications with enterprise database technologies, supporting backend data migration initiatives and utilizing expert-level communication protocols. • Version Control Tracking: Oversee and manage codebase integration using precise merge methodologies across version control platforms like Git, GitLab, BitBucket, etc. • Cross-Domain Troubleshooting: Deliver excellent troubleshooting and issue resolution skills, demonstrating the capacity to quickly isolate and debug complex technical issues even when they occur in areas outside of your immediate domain.