This is us At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX, and UI design, managed services, product development, and software development.
This is the job 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-read

📌 Senior Node.js Engineer (Rincón de los Sauces)
🏢 avenga
📍 Rincón de los Sauces