Senior Backend Developer

Aliancers

full-time

Posted on: 9/17/2025

Origin: • 🇦🇷 Argentina

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Senior

AWSCloudDockerEC2JavaScriptKafkaMicroservicesNode.jsPostgresRabbitMQTerraformTypeScript

About the role

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

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)
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: Amazon EC2, Amazon RDS, AWS Lambda, Amazon S3, AWS CloudWatch
Infrastructure as Code experience (CloudFormation or Terraform)
Experience with microservices architecture
Strong debugging and systems troubleshooting skills
Candidate must be located in Argentina (Need only Argentina candidates who speak both fluent English and Spanish)
Bonus: Knowledge of financial services domain; CI/CD pipeline configuration; Docker; Message queue systems (RabbitMQ, Kafka); Backend observability tools