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.