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Urgent! Sr. Backend Developer Job Opening In Rosario – Now Hiring Aliancers

Sr. Backend Developer



Job description

Formamos parte de una organización dinámica y flexible con gran capacidad de adaptación y compromiso.

Valoramos las competencias, habilidades, experiencia y potencial de las personas, así como sus cualidades personales, aplicando dichos valores tanto a nuestro trato con los clientes como entre nosotros.



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


Required Skill Profession

Computer Occupations



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