As a Sr.
Backend Engineer you will:Architect and develop high-performance backend services using NestJS, ensuring scalability and maintainabilityDesign and optimize PostgreSQL database schemas and query performanceImplement complex business logic and integration patterns for financial service workflowsCreate and maintain RESTful APIs with exceptional performance characteristicsDevelop robust data modeling strategies that support complex financial service configurationsLead backend system design and technical decision-makingLeverage AWS cloud services to build scalable and reliable infrastructureMentor junior engineers and contribute to the overall engineering team cultureImplement comprehensive testing strategies, including unit and integration testingEstablish and maintain backend observability and monitoring infrastructureCollaborate closely with frontend, product,



and design teams to ensure seamless system integrationYou'll be a great fit if you have:7+ years of professional JavaScript development experience7+ years of professional Node.js development experienceExtensive experience with NestJS framework6+ years of professional experience with PostgreSQL and relational database designFluency 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 systemsDeep understanding of TypeScript and advanced JavaScript patternsStrong experience with RESTful API design and implementationExpertise in database optimization and performance tuningComprehensive knowledge of backend testing methodologiesSubstantial AWS cloud services experience, including: Amazon EC2 Amazon RDS AWS Lambda Amazon S3 AWS CloudWatch Infrastructure as Code (CloudFormation or Terraform)Experience with microservices architectureStrong debugging and systems troubleshooting skillsBonus points if you have:Knowledge of the financial services domainCI/CD pipeline configuration experienceDocker experienceMessage queue systems (RabbitMQ, Kafka) experienceBackend observability tools experienceNeed only Argentina candidates who speak both fluent English and Spanish
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📌 Sr. Backend Developer (Rosario)
🏢 ALIANCERS
📍 Rosario