REMOTE (INDIA): Backend Engineer- SaaS platform

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.

3–5 years in backend development.

Prior experience in SaaS applications, high-traffic APIs, or campaign/marketing platforms is preferred.