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.

📌 Senior Node.js Engineer (Buenos Aires)
🏢 avenga
📍 Buenos Aires