Sr. Backend Engineer

As a Sr. Backend Engineer you will :

Architect and develop high-performance backend services using NestJS, ensuring scalability and maintainability

Design and optimize PostgreSQL database schemas and query performance

Implement complex business logic and integration patterns for financial service workflows

Create and maintain RESTful APIs with exceptional performance characteristics

Develop robust data modeling strategies that support complex financial service configurations

Lead backend system design and technical decision-making

Leverage AWS cloud services to build scalable and reliable infrastructure

Mentor junior engineers and contribute to the overall engineering team culture

Implement comprehensive testing strategies, including unit and integration testing

Establish and maintain backend observability and monitoring infrastructure

Collaborate closely with frontend, product, and design teams to ensure seamless system integration

You'll be a great fit if you have :

7+ years of professional JavaScript development experience

7+ years of professional Node.js development experience

Extensive experience with NestJS framework

6+ years of professional experience with PostgreSQL and relational database design

Fluency in English & Spanish (Must).  The team primarily communicates in Spanish, so strong written and verbal Spanish skills are essential.

Proven track record of designing scalable, high-performance backend systems

Deep understanding of TypeScript and advanced JavaScript patterns

Strong experience with RESTful API design and implementation

Expertise in database optimization and performance tuning

Comprehensive knowledge of backend testing methodologies

Substantial AWS cloud services experience, including :

Amazon EC2

Amazon RDS

AWS Lambda

Amazon S3

AWS CloudWatch

Infrastructure as Code (CloudFormation or Terraform)

Experience with microservices architecture

Strong debugging and systems troubleshooting skills

Bonus points if you have :

Knowledge of the financial services domain

CI / CD pipeline configuration experience

Docker experience

Message queue systems (RabbitMQ, Kafka) experience

Backend observability tools experience

Need only Argentina candidates who speak both fluent English and Spanish