Job Summary: We are looking for a Senior Backend Developer to design, develop, and lead complex server-side architectures while mentoring other developers. Key Highlights: 1. Designs and develops complex server-side architectures. 2. Leads the implementation of new technologies and makes key technical decisions. 3. Mentors and advises other developers through code reviews. **Company Description** **We are an international, agile digital consultancy.** In the era of post-digital transformation, we strive to enable each of our 28,000 professionals to continuously renew themselves. Each professional can design their own career path according to their preferences, partner with clients to practically build a more positive world, innovate across all 19 countries, and balance their professional careers with personal well-being. Our 28,000 digital athletes are proud to have been certified **Top Employer Europe 2025**. **Job Description** We are seeking a Senior Backend Developer to perform the following responsibilities: * Designs and develops complex server-side architectures. * Makes key technical decisions and leads the implementation of new technologies. * Conducts code reviews, mentors, and advises other developers. **Requirements** * Primary language: Ruby (Ruby on Rails). * * Databases: PostgreSQL, MySQL, knowledge of NoSQL (MongoDB). * * Version control: Git, GitHub, GitLab. * * Web services and APIs: RESTful APIs, GraphQL. * * Development tools: Docker. * * Testing: RSpec, Minitest. * * Continuous integration: Jenkins. * * Cloud services: AWS. * * 5–6 years of experience working with Ruby on Rails. **Additional Information** **What do we offer?** ‍ Company training program to support your continued development and advancement within your personalized career plan. ✍ Permanent contract and job stability. Flexible compensation and additional benefits. Flexible working hours. Hybrid and/or remote work arrangements. We offer you a dynamic environment where your career path and growth are our top priorities. A positive, open, and inclusive work atmosphere. * ️ You will join a large team of professionals passionate and motivated by technology.