Job Description

Avenga is an international engineering firm helping businesses operate with AI at the core. With 6,000+ experts worldwide, we combine engineering expertise with AI-native thinking to turn ambitious ideas into real-world impact across industries, technologies, and markets.

At the core of the role

In Argentina, we are looking for a Senior Full Stack (Node.js + React.js) Developer to lead a strategic financial-services project. You will work across the entire software development lifecycle, from technical discovery and solution design to implementation, testing, deployment, and production support.

You will have the opportunity to build modern cloud-native solutions, collaborate with product and technology stakeholders, and influence architectural decisions while working in an agile, innovation-driven environment.

As part of the team, you will join a multidisciplinary squad composed of Software Engineers, Technical Leads, Product Owners, and UX specialists.

This role is open to candidates in Argentina, preferably Buenos Aires, for occasional in-person collaboration.

Core skills you’ll bring

• 5+ years of experience developing applications with Node.js and ReactJS.
• Expertise with NestJS, ExpressJS, and RESTful API development.
• Proficiency in designing and developing microservices and/or event-driven architectures.
• Hands-on experience deploying and managing applications in cloud environments.
• Knowledge of NoSQL databases and scalable backend solutions.
• Experience with GitLab, including branching strategies, feature development, and hotfix management.
• Understanding of Infrastructure as Code (IaC) concepts and modern software delivery practices.
• Strong communication, collaboration, and problem-solving skills.
• Native Spanish proficiency and Intermediate English.

Nice-to-have

• Experience working with AWS cloud services such as Lambda, API Gateway, SQS, SNS, EventBridge, Step Functions, and DynamoDB.
• Proficiency with Serverless Framework, Terraform, or other IaC tools.
• Strong knowledge of TypeScript.
• Familiarity with monitoring and observability platforms such as Datadog and Opsgenie.
• Background working in Agile environments and cross-functional product teams.
• Proven ability to design highly available, scalable, and resilient architectures.

The impact you'll create

• Develop and maintain scalable full-stack applications that support key business initiatives and customer experiences.
• Design, build, and optimize APIs, services, and user interfaces with a focus on performance, quality, and usability.
• Collaborate with Technical Leads, Product Owners, and engineering teams to transform business requirements into effective technical solutions.
• Contribute to architectural decisions, continuous improvement initiatives, and the adoption of engineering best practices.
• Enhance application reliability through monitoring, troubleshooting, and proactive optimization efforts.
• Drive innovation by evaluating new technologies and sharing knowledge across teams.

People are at the core of Avenga. We provide equal opportunities regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to a respectful environment where everyone can be themselves, share their ideas, and feel that they belong.