REMOTE (INDIA): Backend Engineer- SaaS platform

Responsibilities: - Maintain and enhance the backend services powering the SaaS platform (Node.js/Express/NestJS with TypeScript). - Ensure uptime, scalability, and performance of APIs handling campaign generation, template storage, and credit-based billing. - Optimize MongoDB queries, indexes, and caching strategies for high-performance APIs. - Implement and manage Redis, job queues, and async workflows. - Monitor and maintain AWS infrastructure: EC2, S3, CloudWatch, Lambda, SES. - Implement security best practices: API authentication, rate-limiting, GDPR compliance, email data handling. - Maintain API versioning and documentation (OpenAPI/Swagger). - Write unit and integration tests to ensure code quality and reliability. - Debug and resolve complex production issues efficiently. Required Skills: - Strong proficiency in Node.js with TypeScript (Express.js or NestJS). - Experience with MongoDB, schema design, and ORMs (Mongoose, Prisma). - Experience with Redis (pub/sub, caching) and job queues (BullMQ/RabbitMQ). - Familiarity with AWS services: EC2, S3, CloudWatch, SES, Lambda. - Dockerized microservices and CI/CD pipelines (GitHub Actions, or similar). - Knowledge of authentication & authorization (JWT, OAuth2, role-based access). - Basic Logging & monitoring experience (Winston, Pino, Prometheus/Grafana). - Unit & integration testing experience (Jest, Mocha, Vitest). - Knowledge of email compliance tools (SpamAssassin, DKIM/SPF/DMARC) is a plus. Experience: - 3–5 years in backend development. Prior experience in SaaS applications, high-traffic APIs, or campaign/marketing platforms is preferred.