Backend Engineer – SaaS platform

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Marrina Decisions

WebsiteLinkedInAll Job Openings

11 - 50 employees

🤝 B2B

B2B • Marketing

Marrina Decisions is a marketing services company that specializes in managed services for marketing campaigns, particularly those involving Marketo. They offer a wide range of services including Marketo optimization, migration, and quick launch, as well as email marketing services. The company acts as an extended team to offload marketing campaign execution work, allowing businesses to focus on their core activities. With expertise in marketing automation and operations, Marrina Decisions prides itself on delivering high-quality, efficient, and empathetic services that make a measurable impact on their clients' campaigns. Clients commend their ability to seamlessly integrate and manage multi-channel and multi-product customer journeys.

📋 Description

• 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

🎯 Requirements

• 3–5 years in backend development • 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 • Knowledge of authentication & authorization (JWT, OAuth2, role-based access) • Unit & integration testing experience (Jest, Mocha, Vitest)