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.
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What We Do
WE ARE MARRINA One of the most time-consuming yet highly-valuable aspects of the marketer’s role is Email Production. Our dedicated team of experienced email and landing page professionals, along with our well-tested development and QA processes, creates high impacting responsive email campaigns. As a leading Email Marketing Agency, let us help you achieve excellent results with quicker execution for those much needed Flawless Emails, empowering you to achieve your goals. OUR PROVEN PROCESS Over 54% of companies have six or more emails in production at one time, with 31% having less than half a week of work going into each one. With so many balls in the air at once, it’s crucial to have a tried and true process for getting emails planned, created, and launched on time. STRATEGY: FULLY EQUIPPING YOU FOR THE VOYAGE Thoroughly defining your email marketing campaign strategy and goals helps guide the direction of your campaign and makes it easier to measure the success of your efforts. We bring expertise to the table to ask the right questions, collect all the requirements in an organized way, and proceed with skilled and efficient execution and campaign management. DEVELOPMENT: ASSURING QUALITY & SMOOTH SAILING Our experts create custom, scalable, and responsive email and landing page templates for optimal performance. But all this work is wasted if there are mistakes, so our foolproof QA process is vital to illuminate any issues. Configuration details, campaign members, email tests, and schedule information are presented to you for final pre-launch approvals. LAUNCH: SETTING SAIL AND STAYING ON COURSE Once approved, email launch monitoring ensures things went off as scheduled and anticipated, on time, and flawless. Post-launch email performance reporting and analysis of A/B testing, within a day after sending and updating after several days, highlights testing results, tweaks, successes, and ROI.
