Senior Node.js Engineer

In Argentina (Buenos Aires), we are seeking a Senior Node.js Engineer to join our engineering team and lead backend development for BFF (Backend-for-Frontend) services and microservice-based systems. You will design, build, and maintain scalable, reliable services, collaborate with product and frontend teams, and drive technical improvements across the stack. The role involves full-lifecycle delivery - from technical scoping and prototyping to implementation, testing, deployment, and support.

This is you

• 5+ years with Node.js (v18+); experience building BFF/back-end services with NestJS or Express;
• Strong RESTful API design and NoSQL integration;
• Experience with microservices and event-driven/asynchronous architectures;
• Cloud deployment and management experience; familiarity with Serverless Framework or IaC tools;
• Proficient with GitLab workflows and setting up monitoring/alerting (e.g., Datadog, OpsGenie);
• Solid technical scoping, requirements translation, and full SDLC ownership;
• Excellent collaboration and communication; works closely with TL and PO to meet deadlines;
• Languages: Spanish (native), English (intermediate);
• Location: Buenos Aires (CABA or AMBA).

Nice-to-have skills

• Experience with AWS serverless (Lambda, API Gateway, SQS/SNS, Step Functions, EventBridge, DynamoDB;
• TypeScript proficiency;
• Frontend (React) experience;
• Familiar with agile SDLC.

This is your role

• Design and maintain BFF and backend services with Node.js (18+) and NestJS;
• Build and document versioned RESTful APIs; integrate within microservices and event-driven systems;
• Translate requirements into prototypes and production-ready technical solutions;
• Ensure code quality: unit tests, code reviews, and defect fixes;
• Deploy and manage cloud applications using IaC or Serverless approaches; ensure production reliability with monitoring, alerting (e.g., DataDog, OpsGenie), and incident response;
• Improve performance, scalability, and availability;
• Maintain functional, architectural, and in-code documentation;
• Collaborate with frontend, product, and tech leads; support team OKRs and mentor juniors.