Senior Full-Stack MERN Engineer - Remote, High-Impact

Workana LLC; Buenos Aires; A distancia; ARS 181.094.000 - 271.641.000; Jornada completa

Descripción de la vacante

OurOffice is seeking a Senior Full Stack MERN Developer to own complex production systems and collaborate with the hands‑on CTO. You will design secure, multi‑tenant APIs and data‑export workflows, working across React, Redux, Node.js, Express, MongoDB, and AWS. Remote Latin America candidates must align with U.S.

West Coast hours and communicate fluently in English. The role covers building scalable features, optimizing performance, and integrating third‑party services while maintaining

Formación

• 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.

Responsabilidades

• 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 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.

Conocimientos

MERN stack

MongoDB

Express.js

React

Node.js

REST APIs

Auth & multi-tenant

AWS

Data export APIs

MongoDB Atlas

CI/CD

Herramientas

S3

CI/CD tooling

Descripción del empleo

OurOffice is seeking a Senior Full Stack MERN Developer to own complex production systems and collaborate with the hands‑on CTO. You will design secure, multi‑tenant APIs and data‑export workflows, working across React, Redux, Node.js, Express, MongoDB, and AWS. Remote Latin America candidates must align with U.S.

West Coast hours and communicate fluently in English. The role covers building scalable features, optimizing performance, and integrating third‑party services while maintaining