Senior Software Engineer

Senior Backend Developer PayPlus is looking for a self-motivated Senior Backend Developer to help build and scale our payments and commerce platform using Node.js and Go (Golang) . Strong Node.js expertise is required; hands-on Go experience is a significant advantage. You will take a leading technical role in developing new products and enhancing existing systems, combining hands-on development with architectural ownership. The ideal candidate has experience with large-scale applications, takes responsibility for production outcomes, and brings strong communication and collaboration skills. Responsibilities Design, develop, and maintain scalable backend services using Node.js, TypeScript, and Go . Write clean, efficient, well-tested, and maintainable code. Own features from technical design through implementation, deployment, and production support. Develop APIs, database integrations, third-party interfaces, and event-driven workflows. Improve application performance, database efficiency, and system resilience. Collaborate with product, frontend, QA, and infrastructure teams to meet business, security, and compliance requirements. Troubleshoot production issues, investigate root causes, and implement lasting solutions. Contribute to architectural decisions, lead code reviews, and mentor other developers. Improve automated testing, deployment processes, and engineering standards. Required Qualifications Bachelor’s degree in Computer Science, Software Engineering, or a related field. 6+ years of relevant backend development experience, with demonstrated ownership of complex production services. Strong hands-on expertise in Node.js, JavaScript, and TypeScript . Deep understanding of asynchronous programming, the Node.js event loop, error handling, and performance optimization. Strong knowledge of software design principles, object-oriented design, and database design. Experience designing REST APIs and integrating with external services. Understanding of data consistency and reliable service communication, including timeouts, retries, and idempotency. Experience with automated testing, Git, and collaborative development practices. Understanding of application security, authentication, authorization, and secure data handling. Experience working with Agile or Scrum methodologies. Ability to work independently, prioritize work, and communicate technical decisions clearly. Strong teamwork, problem-solving, and mentoring skills. Good written and spoken English. Preferred Qualifications Production experience with Go (Golang), including goroutines, channels, context cancellation, and building concurrent services a significant advantage. Experience designing and operating microservices-based architectures. Experience with relational, NoSQL, or graph databases, including PostgreSQL Experience with message brokers and event-streaming platforms, such as RabbitMQ or Kafka. Experience building and maintaining CI/CD pipelines. Hands-on experience with Docker, Kubernetes, and cloud infrastructure, preferably AWS. Familiarity with GraphQL or gRPC. Working knowledge of Vue.js or React . Experience with Redis, caching strategies, or workflow orchestration platforms such as Temporal. Experience in payments, fintech, billing, subscriptions, or high-volume transaction processing. Show more Show less