REMOTE (INDIA): Backend Engineer- SaaS platform

Marrina Decisions

21h • Remote

About The Position

The Backend Engineer will maintain and enhance backend services for a SaaS platform. The role focuses on reliable, scalable, high-performance APIs for campaign generation, template storage, and credit-based billing. It also involves maintaining AWS infrastructure, applying security and email-data practices, documenting APIs, testing code, and resolving production issues.

Requirements

• 3–5 years of backend development experience.
• Strong proficiency in Node.js with TypeScript and Express.js or NestJS.
• Experience with MongoDB, schema design, and ORMs such as Mongoose or Prisma.
• Experience with Redis, including pub/sub and caching, and job queues such as BullMQ or RabbitMQ.
• Familiarity with AWS services including EC2, S3, CloudWatch, SES, and Lambda.
• Experience with Dockerized microservices and CI/CD pipelines such as GitHub Actions or similar.
• Knowledge of authentication and authorization, including JWT, OAuth2, and role-based access.
• Basic logging and monitoring experience with tools such as Winston, Pino, Prometheus, or Grafana.
• Unit and integration testing experience with Jest, Mocha, or Vitest.

Nice To Haves

• Knowledge of email compliance tools and standards such as SpamAssassin and DKIM/SPF/DMARC.
• Prior experience with SaaS applications, high-traffic APIs, or campaign/marketing platforms.

Responsibilities

• Maintain and enhance backend services powering the SaaS platform, built with Node.js, TypeScript, and frameworks such as Express or NestJS.
• Ensure uptime, scalability, and performance of APIs handling campaign generation, template storage, and credit-based billing.
• Optimize MongoDB queries, indexes, and caching strategies.
• Implement and manage Redis, job queues, and asynchronous workflows.
• Monitor and maintain AWS infrastructure, including EC2, S3, CloudWatch, Lambda, and SES.
• Implement security best practices, including API authentication, rate limiting, GDPR compliance, and email data handling.
• Maintain API versioning and documentation using OpenAPI or Swagger.
• Write unit and integration tests to support code quality and reliability.
• Debug and resolve complex production issues efficiently.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed