Overview: Expleo is a trusted partner for your innovation journey. As a global engineering, technology and consulting service provider, we are ideally positioned to help you achieve your ambitions and future\-proof your business. With a smart blend of bold thinking and reliable execution, we’re able to fast\-track innovation through each step of your value chain. We are strategically positioned to build value, with a global footprint across 30 countries. We are as global and local as you need us to be, with strong best\-in\-class pan\-European technological centres and unique best\-shoring capabilities. We leverage a network of high value\-adding affiliates in consulting and industrial excellence, and leading partners across multiple sectors to provide you with the most comprehensive services and solutions in an ever\-changing environment. Responsibilities: * Design, develop, and maintain **web applications using Ruby on Rails**. * Collaborate with product managers, designers, and other developers to define and deliver features. * Ensure high standards of code quality, performance, and security. * Lead code reviews, provide technical guidance, and mentor junior developers. * Integrate applications with third\-party APIs and services. * Contribute to architectural decisions and best practices across the team. * Support CI/CD pipelines and agile delivery practices. Essential skills: * 5\+ years of professional experience with **Ruby on Rails**. * Strong knowledge of **relational databases** (PostgreSQL, MySQL) and ORM frameworks. * Experience with **frontend technologies** (JavaScript, React, or similar). * Familiarity with **cloud platforms** (AWS, Azure, or GCP). * Solid understanding of **REST APIs, microservices, and system integrations**. * Experience with **testing frameworks** (RSpec, Capybara, etc.). * Strong problem\-solving skills and ability to work in agile teams. * Excellent communication skills and fluency in English. What do I need before I apply: * The candidate must already be living in Portugal.