Senior React/Typescript Fullstack Engineer – Ai-Driven

Bairesdev; Ciudad de Mendoza; On-site; ARS 92,983,000 - 154,971,000; Full time

Job summary

BairesDev in Mendoza, Argentina is seeking a Full Stack Engineer to join its Cloud Platform Engineering Team. You will build and scale end-to-end web apps, tying React front-ends to robust back-end services, PostgreSQL databases, and secure authentication workflows.

You will design schemas, build REST APIs, containerize with OCI images, integrate Keycloak with OIDC/OAuth 2.0 and JWT, ensure security via CORS and token storage, and contribute to automated testing and GitHub Actions workflows.

Qualifications

• 3+ years of professional software development experience.
• Proficiency in React, PostgreSQL, and REST APIs.
• Experience with Keycloak and modern web authentication (OIDC/OAuth 2.0/JWT).
• Strong understanding of token storage, CORS, and stateless sessions.
• Experience with containerized apps and CI/CD, preferably GitHub Actions.
• Ability to write secure, scalable, and maintainable software.

Responsibilities

• Build and scale end-to-end web applications connecting frontends to backend services.
• Design, optimize, and query PostgreSQL schemas for performance and scalability.
• Create, test, and maintain RESTful APIs and OCI container images.
• Integrate Keycloak with React frontends and backend services using OIDC/OAuth 2.0/JWT.
• Ensure secure API endpoints with token validation and proper security practices.
• Contribute to automated testing and CI/CD pipelines (GitHub Actions).
• Collaborate with the engineering team to deliver reliable cloud-based applications.

Skills

React

PostgreSQL

REST APIs

Keycloak

OIDC/OAuth 2.0/JWT

CORS

Containerization

GitHub Actions

Security best practices

Software engineering best practices

Tools

GitHub Actions

OCI container images

Job description

The Role: We are looking for a Full Stack Engineer to join our Cloud Platform Engineering Team.

In this role, you will be responsible for building and scaling end-to-end web applications, connecting modern and responsive user interfaces with robust backend services, database architecture, and secure authentication workflows.

Design, optimize, and query PostgreSQL database schemas with a strong focus on performance and scalability.

Build and consume RESTful APIs , packaging application logic as stateless OCI container images .

Integrate OIDC/OAuth 2.0 authorization code flows into React frontends and backend services using Keycloak .

Secure API endpoints through JWT verification, token exchange policies, and scope validation .

Implement modern web security practices, including appropriate token storage, CORS , and stateless session management.

Write and maintain unit, integration, and contract tests .

Integrate automated testing into GitHub Actions , ensuring tests are executed on every pull request.

Collaborate with the engineering team to build reliable, maintainable, and scalable cloud-based applications.

Requirements:

3+ years of professional software development experience , with strong hands-on experience in:

• React
• Relational databases, particularly PostgreSQL
• Experience designing and consuming REST APIs .
• Direct experience with Keycloak , including client libraries such as keycloak-js.
• Solid understanding of OIDC, OAuth 2.0, JWT, and modern web authentication and authorization practices .
• Understanding of token storage best practices, CORS , and stateless session management.
• Experience working with containerized applications and workflows .
• Experience with automated CI/CD environments , preferably GitHub Actions .
• Strong understanding of software engineering best practices and the ability to build secure, scalable, and maintainable applications.

Core Tech Stack