FreeHire

Aliancers

Sr. Backend Developer

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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

Originally posted on Himalayas