Senior Front-End Engineer (React/Node) - Lead Full-Stack

Avenga; Argentina; Hybrid; ARS 1,800,000 - 3,000,000; Full time

Job summary

Avenga, an international engineering firm, is hiring a Senior Front-end Engineer in Argentina (Buenos Aires preferred) to lead a strategic financial-services project. You will work across the full software lifecycle, from discovery to deployment, building cloud-native solutions and collaborating with product and technology stakeholders.

You will craft modern frontend experiences with React.js and Node.js, contribute to BFF services using Express.js or NestJS, and design scalable architectures in

Qualifications

• 5+ years of commercial experience with React.js and frontend practices.
• Hands-on Node.js experience (v18+), Express.js and/or NestJS.
• Experience with RESTful APIs and NoSQL databases.
• Cloud deployment and IaC familiarity; GitLab workflows.
• Fluent Spanish and intermediate English.

Responsibilities

• Design, develop, and maintain frontend with React.js emphasis.
• Build BFF services using Node.js, Express.js, and NestJS.
• Create intuitive, user-centric interfaces focused on usability and performance.
• Develop, integrate, and optimize RESTful APIs and backend services.
• Write unit tests and conduct code reviews to ensure quality.
• Maintain and enhance production applications with new features.
• Collaborate with Product Owners and stakeholders to translate requirements.
• Build prototypes during discovery and project scoping.
• Share knowledge to strengthen team practices and tech capabilities.
• Align technical initiatives with OKRs and business goals.

Skills

React.js

Node.js

Microservices

REST APIs

NoSQL

Cloud deployment

IaC

GitLab

Datadog

Opsgenie

Communication

Spanish

English

Express.js

NestJS

Tools

Express.js

NestJS

GitLab

Datadog

Opsgenie

AWS (Nice-to-have)

Job description

Avenga, an international engineering firm, is hiring a Senior Front-end Engineer in Argentina (Buenos Aires preferred) to lead a strategic financial-services project. You will work across the full software lifecycle, from discovery to deployment, building cloud-native solutions and collaborating with product and technology stakeholders.

You will craft modern frontend experiences with React.js and Node.js, contribute to BFF services using Express.js or NestJS, and design scalable architectures in