We are seeking a Middle NodeJS Developer to join our team and contribute to the development of a complex, high-load payment processing platform for our U.S.-based client. The product supports subscription management, real-time reporting, chargeback resolution, and integrations with popular platforms such as Shopify, WordPress, QuickBooks, and more. 

Tech stack:
Node.js, React.js, SQL/NoSQL, AWS, Payment service integrations 

Responsibilities: 

• Build and maintain backend APIs and services using NodeJS
• Design database schemas and optimize queries (PostgreSQL, MySQL) 
• Implement authentication and authorization (JWT, OAuth) 
• Integrate with external APIs and payment services 
• Work with AWS services (S3, Lambda, DynamoDB, etc.) 
• Set up CI/CD pipelines and automate deployments 
• Use RabbitMQ, Kafka, or similar tools for background processing 
• Write unit and integration tests (Jest, Mocha) 
• Manage API versioning and ensure backward compatibility 
• Monitor and debug using tools like Prometheus, ELK, OpenTelemetry 
• Refactor code and apply SOLID principles 
• Participate in technical discussions and code reviews 

Requirements: 

• 2+ years of commercial experience with NodeJS  
• Strong knowledge of SQL/NoSQL databases and REST API development 
• Experience with AWS and cloud-native application design 
• Proficiency in writing automated tests and debugging production issues 
• Good communication skills and ability to work independently 
• Upper Intermediate English or higher 

Nice to have: 

• Experience in fintech or high-risk payment platforms 
• Experience with React 
• Familiarity with Python or Java as a secondary backend language 
• Exposure to DevOps practices and microservices architecture 

If you are a skilled NodeJS Developer who enjoys solving complex problems and working on impactful products, we would love to hear from you. Apply now and become part of a team that values ownership, innovation, and quality engineering.