WHY JOIN EXADEL  We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks. From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next. What powers it all? Our people are ambitious, collaborative, and constantly evolving. ABOUT THE CLIENT   The company has been building solutions for mobile apps, effortless payment, business travel, and advertising since 1992. The customer is developing a mobility platform that allows operators to manage their vehicles and drivers efficiently, regulators to be informed and establish guidelines, service providers to deliver sustainable solutions, and riders to have an effortless transit experience. PROJECT TEAM  The project is a taxi ordering service. The user can hail a taxi, monitor an ordered taxi, pay for a ride, and see trip history. The system contains the following components: * Ride server (all data processing); * Payment server (PCI DSS-compliant), which performs a transaction with the passenger's digital wallet and payment gateways; * Mobile application (hail taxi, geocoding, map, payments); * Taxi terminal (3rd party). The project integrates with 3rd party services, including PayPal, MasterPass, Stripe, and Twilio. Team: 1 Team Lead, 1 UI Developers, 6 Back-End Developers, 9 Mobile Developers, 5 QA, 2 BA and 2 Designer. WHAT YOU’LL DO   * Hands-on Development & Automation: Write real code for autoscaling, internal tooling, and operational automation * Application Performance & Reliability: Improve the overall performance, scalability, and reliability of our applications * Database & Infrastructure Optimization: Work directly on database optimization, containerized environments, and continuous delivery * CI Automation: Enhance automated CI processes and development pipelines * AWS & Container Management: Maintain, optimize, and manage applications across our Docker, Kubernetes, and AWS stack  WHAT YOU BRING * Strong Ruby Development Skills: Experienced Ruby developer with a solid background in software development * Containers & Orchestration: Strong, practical experience with Kubernetes and Docker * Cloud Infrastructure: Hands-on experience working with the AWS stack * Database Expertise: Proven experience with database optimization * CI/CD Automation: Experience with CI automation and infrastructure processes * Mindset: Enjoys working on performance, reliability, and infrastructure, rather than building standard product features ENGLISH LEVEL  Upper-Intermediate LEGAL & HIRING INFORMATION * Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more. * Reasonable accommodations are available to enable individuals with disabilities to perform essential functions. * Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs. * Compensation details are shared with candidates at the early stage of the recruitment process. * The offer is not binding until a signed contract is in place. YOUR BENEFITS AT EXADEL  Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details. * International projects * In-office, hybrid, or remote flexibility * Medical healthcare * Recognition program * Ongoing learning & reimbursement  * Well-being program * Team events & local benefits  * Sports compensation  * Referral bonuses  * Top-tier equipment provision EXADEL CULTURE We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.