Summary: Seeking a highly motivated Senior JavaScript Developer to build scalable, high-performance solutions and collaborate with cross-functional teams in a fast-paced environment. Highlights: 1. Design and develop scalable backend services and APIs using Node.js 2. Architect and implement cloud-native solutions on AWS 3. Build and maintain microservices with seamless integration We are seeking a highly motivated and skilled **Senior JavaScript Developer** with a strong focus on AWS and Node.js. In this role, you will work on building scalable, high\-performance solutions for complex business needs. You will collaborate with cross\-functional teams to deliver robust applications in a dynamic and fast\-paced environment. **Responsibilities** * Design and develop scalable backend services and APIs using JavaScript and Node.js * Collaborate with team members to architect and implement cloud\-native solutions on AWS * Build and maintain microservices, ensuring seamless integration and communication between components * Optimize application performance for high availability and low latency * Participate in code reviews and contribute to best practices for software development * Implement and manage CI/CD pipelines for automated deployments and testing * Troubleshoot and resolve issues in production and development environments * Work closely with stakeholders to gather requirements and deliver solutions that meet business objectives **Requirements** * At least 3 years of hands\-on experience with Node.js in a production environment * Experience with deployment processes, CI/CD pipelines, and managing microservices both with and without containers * Proven ability to build and maintain REST APIs for scalable applications * Experience developing systems that require high availability and low latency * Practical knowledge of payment systems, especially in acquiring or issuing domains * Previous experience working with promotions or acquiring processors in a financial context * Strong background in AWS services, including Lambda, EKS, ECS, SQS, SNS, EventBridge, DynamoDB, API Gateway, CloudWatch, and DMS tools * Proficiency in integration patterns and microservices architecture for distributed systems * Active use of AI agents and development assistants for solution design, code generation, and continuous improvement * Fluent English skills (written and spoken) at a B2\+ level or higher **Nice to have** * Experience with Apache JMeter for performance testing * Familiarity with Atlassian Jira for project tracking and management * Knowledge of contract testing tools and PactumJS for API validation * Experience with Datadog and Grafana k6 for monitoring and performance analysis * Background in FinTech and understanding of financial technology solutions * Proficiency in Java, Python, and JavaScript for multi\-language development * Experience with NoSQL databases for flexible data storage * Familiarity with Postman, REST Assured, SoapUI, and SwaggerHub for API testing and documentation * Experience using the Zephyr plug\-in for JIRA for test management