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.