REMOTE (INDIA): Backend Engineer- SaaS platform

Marrina Decisions is hiring a REMOTE Backend Engineer for their SaaS platform. Responsibilities: * Maintain and enhance backend services (Node.js/Express/NestJS with TypeScript). * Ensure uptime, scalability, and performance of APIs for campaign generation, template storage, and credit-based billing. * Optimize MongoDB queries, indexes, and caching strategies. * Implement and manage Redis, job queues, and async workflows. * Monitor and maintain AWS infrastructure (EC2, S3, CloudWatch, Lambda, SES). * Implement security measures.