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.Originally posted on Himalayas