Fullstack SR – ID #00370

Werben HR; Buenos Aires; Hybrid; ARS 900,000 - 1,500,000; Full time

Job summary

Werben HR in Buenos Aires is seeking a versatile developer to build and maintain web applications using React.js and Node.js, and to design secure RESTful APIs. You will optimize performance, deliver responsive multilingual interfaces, and integrate with enterprise systems.

You will also provide Level 2/3 production support, troubleshoot complex issues, and apply technical modernization practices including secure coding and event-driven batch workflows.

Qualifications

• Fluent Spanish and professional English (written and verbal)
• Strong problem-solving abilities with attention to detail
• Excellent communication skills for interacting with business stakeholders
• Ability to work independently and manage multiple priorities
• Collaborative mindset with experience in Agile methodologies
• Experience with Azure services (App Service, SQL Database, Key Vault, Blob Storage, AKS)
• Knowledge of Redis or similar caching solutions
• Familiarity with authentication protocols (OAuth 2.0, SAML, OpenID Connect)
• Experience with monitoring tools (Application Insights, Splunk, AppDynamics)
• Understanding of financial/procurement processes in enterprise environments
• Experience with Angular or Vue.js frameworks
• Knowledge of message queuing systems (Service Bus, RabbitMQ)
• Exposure to Infrastructure as Code (Terraform, ARM templates)
• Professional Portuguese (written and verbal)

Responsibilities

• Develop, maintain, and enhance features for web applications using React.js, Node.js, and JavaScript
• Design and implement RESTful APIs and microservices following best practices and security standards
• Optimize application performance, including database queries, caching strategies, and frontend rendering
• Implement responsive, accessible user interfaces supporting multiple languages (Spanish, Portuguese, English)
• Integrate applications with enterprise systems and third-party services
• Provide Level 2/3 support for production applications
• Troubleshoot and resolve complex technical issues across the full application stack
• Perform root cause analysis and implement permanent fixes to prevent recurring incidents
• Monitor application health using APM tools and proactively address performance degradation
• Collaborate with business users to understand and resolve functional issues
• Implement security best practices including OWASP standards, secure coding, and vulnerability remediation
• Modernize batch processing workflows to event-driven architectures
• Contribute to technical debt reduction and architectural improvements
• Document technical designs, APIs, and operational procedures

Skills

Fluent Spanish

Professional English

Strong problem-solving

Excellent communication

Agile methodologies

Independent work

Prioritization

Collaborative mindset

Tools

Azure App Service

Azure SQL Database

Azure Key Vault

Azure Blob Storage

Azure Kubernetes Service

Redis

OAuth 2.0

SAML

OpenID Connect

Application Insights

Splunk

AppDynamics

Terraform

ARM templates

Service Bus

RabbitMQ

Angular

Vue.js

CI/CD

Job description

30 September, 2026

Application Development & Maintenance (60%)

• Develop, maintain, and enhance features for web applications using React.js, Node.js, and Java Script.
• Design and implement RESTful APIs and microservices following best practices and security standards
• Optimize application performance, including database queries, caching strategies, and frontend rendering
• Implement responsive, accessible user interfaces supporting multiple languages (Spanish, Portuguese, English)
• Integrate applications with enterprise systems and third-party services

Production Support & Incident Management (25%)

• Provide Level 2/3 support for production applications
• Troubleshoot and resolve complex technical issues across the full application stack
• Perform root cause analysis and implement permanent fixes to prevent recurring incidents
• Monitor application health using APM tools and proactively address performance degradation
• Collaborate with business users to understand and resolve functional issues

Technical Modernization & Innovation (15%)

• Implement security best practices including OWASP standards, secure coding, and vulnerability remediation
• Modernize batch processing workflows to event-driven architectures
• Contribute to technical debt reduction and architectural improvements
• Document technical designs, APIs, and operational procedures

Required Qualifications

Soft Skills

• Fluent Spanish and professional English (written and verbal)
• Strong problem-solving abilities with attention to detail
• Excellent communication skills for interacting with business stakeholders
• Ability to work independently and manage multiple priorities
• Collaborative mindset with experience in Agile methodologies

Preferred Qualifications

• Experience with Azure services (App Service, SQL Database, Key Vault, Blob Storage, Azure Kubernetes Service)
• Knowledge of Redis or similar caching solutions
• Familiarity with authentication protocols (OAuth 2.0, SAML, OpenID Connect)
• Experience with monitoring tools (Application Insights, Splunk, AppDynamics)
• Understanding of financial/procurement processes in enterprise environments
• Experience with Angular or Vue.js frameworks
• Knowledge of message queuing systems (Service Bus, RabbitMQ)
• Exposure to Infrastructure as Code (Terraform, ARM templates)
• Professional Portuguese (written and verbal)