.Aircall is a place where voices are valued. Backed by over $220 million of investment since 2015, we create technology that fuels accessible, transparent and collaborative communication to empower our base of 18,000+ customers (and growing) to make authentic, human connections. Conversation is a cornerstone of our culture. Wherever our people find themselves in the Aircall world – Paris, New York, San Francisco, Sydney, Madrid, London, Berlin, or at home – everyone has a voice that is valued. Whatever your background, wherever you're from – we want you to join the conversation. Let's talk. We are looking for engaged and passionate Senior Software Engineer to join our growing engineering department and be part of our Core Platform team in EMEA. As a Senior Software Engineer , you will be responsible for the design, development, deployment, and operation of business-critical features that add customer value. Operational excellence, metrics, observability and best practices, evangelization, and mentoring in your team and across the whole of Engineering will be part of your day to day job. Quality, excellence, and agility drive our delivery processes and you will help us level these up. Using Ruby and Typescripts back-end stacks, appropriate for each requirement, but always hosted on AWS, we build added value and resilient services on top of voice and fully integrate with our customers' business critical tools (CRM, Helpdesk, E-Commerce, …). Your mission @ Aircall: Be part of an engineering organization delivering high quality, secure, and scalable solutions to Aircall clients Write clean scalable code using Ruby and Typescript / Node.Js, test and deploy applications and systems Have key responsibilities within the requirements analysis, solution design, architecture, and end-to-end delivery of key modules in order to provide business solutions Involvement in product and platform performance optimization and live site monitoring Mentor junior team members A little about you: You have at least 5+ years of experience in back-end development, using Ruby / Ruby On Rails , with a focus on delivering for security, scalability, availability, and performance. Experience with Typescript/Node.Js is a plus You have worked extensively with AWS in a production environment , preferably for high volume / high availability services and understand how to design for, deploy on and get the best out of, the environment and services provided by Amazon. You are rigorous with code quality and other engineering best practices (testability, maintainability), and are accustomed to using systems such as Jira, Confluence, GitLab, GitHub, etc. Clean Code, Clean Architecture, Test Driven Development, Behaviour Driven Development and Continuous Integration/Deployment are the way you design, develop and release software. You possess effective and proactive communication skills, and can collaborate with different profiles and roles