[Hiring] Full Stack MERN Developer @Workana

Role Description

As a Full Stack MERN Developer, you will maintain and scale an established MERN application while building new features and improving the platform’s security, performance, reliability, and observability.

You will be responsible for:

• Designing and implementing secure multi-tenant APIs, large-data processing workflows, integrations with third-party services, and end-to-end product features using React, Redux, Node.js, Express, MongoDB, and AWS.

This is a long-term remote opportunity for a senior or expert engineer based in Latin America who can work during U.S. West Coast business hours and communicate fluently in English.

Qualifications

• 5+ years of professional experience developing full stack applications with the MERN stack.
• Advanced experience with MongoDB, Express, React, and Node.js.
• Strong experience designing and developing backend systems and production-grade APIs.
• Proven experience building data-access, reporting, analytics, or data-export APIs.
• Strong knowledge of REST APIs, API design, and API versioning.
• Solid understanding of authentication, authorization, and multi-tenant application security.
• Practical experience with Node.js streams, backpressure, batching, and processing large datasets without loading everything into memory.
• Strong knowledge of concurrency, retries, idempotency, timeouts, failure recovery, and asynchronous processing.
• Deep experience with MongoDB indexes, aggregation pipelines, query optimization, explain(), and Mongoose.
• Strong AWS experience, particularly with EC2, S3, IAM, CloudFront, and WAF.
• Strong React and Redux experience in established production codebases.
• Availability to work in alignment with U.S. West Coast / Los Angeles business hours.

Requirements

• Maintain, debug, and scale a production MERN application.
• Build secure Data Export and Analytics APIs for Microsoft Power BI and other external systems.
• Design large-data workflows using MongoDB cursors, batching, Node.js streams, CSV exports, and Amazon S3.
• Implement secure multi-tenant access with authentication, authorization, API credentials, rate limiting, and strict organization-level data isolation.
• Design and optimize MongoDB and Mongoose schemas, indexes, aggregation pipelines, Atlas Search configurations, and database queries.
• Analyze query performance using tools such as explain() and implement appropriate optimization strategies.
• Build reliable asynchronous workflows with concurrency controls, retries, idempotency, leases, locks, timeouts, and failure recovery.
• Develop new features end-to-end across React, Redux, Node.js, and Express.
• Integrate and maintain third-party services, including AI/NLP tools, Twilio, SendGrid, Stripe, Microsoft services, Slack, and AWS services.
• Improve application performance, security, reliability, logging, monitoring, and observability.
• Investigate and resolve production issues in a large, established application.
• Collaborate directly with the CTO to define technical solutions, prioritize work, and deliver reliable production features.
• Contribute to technical documentation, development standards, and continuous improvement of the platform.

Benefits

• Compensation in USD.
• Fully remote, long-term opportunity.
• Work directly with a technical founder and CTO.
• Professional growth toward a technical lead position.