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Sr SW Engineer - Seller Management at Visa. Location Information: Brazil. Company Description. Founded by experienced entrepreneurs and engineers in 2016, Pismo is a technology company that provides a comprehensive processing platform for banking, card issuing and financial market infrastructure and helps customers innovate and build the next generation of banking and payment solutions. Pismo joined Visa in 2024.. Leveraging Visa’s solutions, our core platform, and an expanding suite of capabilities, Pismo addresses the technological challenges that large banks, marketplaces, and fintech companies face in migrating from legacy systems to more advanced technology in the market. Pismo’s cloud-based platform empowers firms to build and launch financial products rapidly, scaling as they grow to have a broader audience while keeping high security and availability standards.. Pismo’s 500+ employees are located in more than 10 countries around the world.. Job Description. Summary. The Seller Management Platform is composed of services for managing sellers/merchants, from their registration to financial aspects such as payments scheduling and settlement. The product is contracted by clients, whether a financial institution or not, that requires a merchant management solution.. What you'll do. Own the development of efficient, readable, testable, and well-documented code aligned with the team’s technical direction.. Lead the design and execution of robust test strategies to ensure high coverage of business logic and overall system reliability.. Actively participate in all stages of the software development lifecycle — including technical planning, design, hands-on coding, testing, deployment, and production support.. Continuously improve existing codebases through in-depth code reviews, mentoring, and by driving engineering excellence.. Collaborate with cross-functional teams to evolve best practices, engineering standards, and development methodologies that boost team efficiency and product quality.. Ensure system stability and performance through proactive monitoring, incident response, and participation in on-call rotations.. Serve as a technical reference within the team, fostering a culture of quality, ownership, and continuous learning.. This is a remote position. A remote position does not require job duties be performed within proximity of a Visa office location. Remote positions may be required to be present at a Visa office with scheduled notice.. Qualifications.  . For this role, you must be based in Brazil. Language Skills:. Proficiency in English at B1 level (Intermediate). Technical Skills:. Proven experience working with GoLang in production environments. Strong background in designing, architecting, and developing high-availability, high-throughput systems using both Java and GoLang. Hands-on experience with AWS services like SQS, SNS, EventBridge, S3, Step Functions, and Lambda | building cloud-native, event-driven systems. Solid experience with microservices architecture, including cross-team governance and performance tuning. Proficiency with relational databases (MySQL) and non-relational databases (DynamoDB) at scale. Strong understanding of DevOps practices: CI/CD pipelines, infrastructure as code (e.g., Terraform, AWS CloudFormation), monitoring, and observability. Deep expertise in testing strategies: unit tests, integration tests, contract tests, and chaos testing in distributed systems. Desirable Qualifications. Familiarity with DevOps tools and practices like Terraform, Kubernetes, GitLab CI/CD, Codefresh, and ArgoCD. Understanding of cloud cost optimization strategies and application performance profiling. Additional Information. Visa is an EEO Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.