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BU Consultants

Job role - Golang Backend Developer Location - O'Fallon, Missouri, USA (Onsite) Experience - 10+ years Role Summary We are looking for a senior Golang Backend Developer to design and build high-availability, scalable services for a payments platform. You will own backend components across payment processing and transaction management, working in a PCI DSS-compliant environment with an event-driven, Kafka-based architecture.
 Key Responsibilities • Design, develop and maintain backend services and APIs in Go for payment processing and transaction management. • Build highly available, scalable and fault-tolerant systems that handle high transaction volumes. • Implement secure APIs using OAuth 2.0, JWT and encryption, in line with PCI DSS requirements. • Develop event-driven and asynchronous workflows using Kafka. • Write unit and integration tests and follow test-driven development (TDD) practices. • Maintain CI/CD pipelines with Jenkins and work with Git-based workflows on Linux. • Set up and use monitoring and logging tools to keep services observable and reliable in production. • Collaborate with architects, QA and product teams on design reviews and production support.
 Must-Have Skills &amp; Experience • 10+ years of software development experience, with strong hands-on Golang backend work. • Payments domain: payment processing, transaction management, high availability, scalability and PCI DSS compliance. • Tools: Git, Linux, Jenkins, monitoring and logging tools. • Testing: unit testing, integration testing, test-driven development (TDD). • Security: OAuth 2.0, JWT, encryption, secure API development. • Messaging: Kafka, event-driven architecture, asynchronous processing.
 Good to Have • Exposure to Python or Java. • Experience with AWS cloud services. • Familiarity with microservices and containerised deployments.