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Sr. SW Engineer - Seller Management at Pismo. Location Information: Brazil. 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.. Minimum Qualifications. 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. Core Benefits. Remote work. Flexible hours. Meal & Food vouchers . Remote work financial support. Life Insurance. Medical and Dental. Assistance Employee child care benefit: daycare. Private Pension (2x1). Vidalink partnership. Support for studying languages. Incentive for AWS and GCP certifications. Sesc Partnership. Performance Incentive Plan