Senior AI-Driven Backend Engineer – NestJS & AWS

Webflow, Inc.; Buenos Aires; On-site; ARS 1,800,000 - 3,600,000; Full time

Job summary

AgileEngine in Argentina is seeking a senior backend engineer to architect and develop scalable services using NestJS and PostgreSQL. You will drive complex financial workflows, design robust APIs, and optimize data models while mentoring peers.

Fluency in English and Spanish is required as the team communicates primarily in Spanish. The role focuses on cloud-based infrastructure in AWS and collaboration with frontend, product, and design teams.

Qualifications

• 7+ years of professional Node.js development experience.
• Extensive experience with NestJS framework.
• 6+ years of professional experience with PostgreSQL and relational design.
• Fluency in English and Spanish (must).
• Proven track record designing scalable, high-performance backend systems.
• Strong RESTful API design and implementation.
• Expertise in database optimization and performance tuning.
• Comprehensive knowledge of backend testing methodologies.
• Experience with AWS services and IaC tooling.
• Experience with microservices architectures.

Responsibilities

• Architect and develop high-performance backend services using NestJS.
• Design and optimize PostgreSQL schemas and queries.
• Implement complex business logic and integration patterns for financial workflows.
• Create and maintain RESTful APIs with performance focus.
• Develop data modeling strategies for financial configurations.
• Lead backend system design and technical decision-making.
• Leverage AWS to build scalable, reliable infrastructure.
• Mentor junior engineers and contribute to team culture.
• Establish testing strategies including unit and integration tests.
• Maintain observability and monitoring for backend systems.
• Collaborate with frontend, product, and design teams for integration.

Skills

Node.js

RESTful API design

Software architecture

Data modeling

English & Spanish fluency

Testing methodologies

Debugging & troubleshooting

Mentoring

Team collaboration

Tools

NestJS

PostgreSQL

AWS

EC2

RDS

Lambda

S3

CloudFormation / Terraform

Job description

AgileEngine in Argentina is seeking a senior backend engineer to architect and develop scalable services using NestJS and PostgreSQL. You will drive complex financial workflows, design robust APIs, and optimize data models while mentoring peers.

Fluency in English and Spanish is required as the team communicates primarily in Spanish. The role focuses on cloud-based infrastructure in AWS and collaboration with frontend, product, and design teams.