Senior Fullstack Engineer - Madrid - Aircall

Job Title: Senior Fullstack Engineer - Madrid
Job Location: Madrid
Job Listing URL: https://jobs.lever.co/aircall/efe0d7ee-3f9b-47ae-8f2d-5506bc64e26e
Job Description: Aircall is the world’s leading integrated customer communications and intelligence platform for growing businesses. Trusted by over 20,000 companies worldwide, Aircall unifies voice and digital channels into one seamless platform, offering one-click integrations with leading CRMs and over 100 business tools. With real-time, AI-powered insights and feedback, AI agents, and automation, we help sales and support teams save time on routine tasks, uncover opportunities, and deliver exceptional customer experiences. With a global team of 600+ across nine offices, Paris, New York, San Francisco, Sydney, Madrid, London, Berlin, Seattle, Mexico City, Aircall is transforming how businesses connect with their customers, driving smarter conversations, deeper relationships, and measurable success.

How We Work at Aircall: At Aircall, we believe in customer obsession, continuous learning, and delivering extraordinary outcomes. We value open collaboration, taking ownership, and making smart, informed decisions with speed and precision. If you thrive in a fast-paced, team-driven environment where curiosity, trust, and impact matter, you'll fit right in

We are looking for an engaged and passionate Senior Software Engineer to join our growing Engineering Team.
As a Senior Software Engineer, you will be responsible for the design, development, deployment, and operation of business-critical features that add customer value on top of Voice.
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 a variety of back-end stacks, appropriate for each requirement, but always hosted on AWS, we build added value and resilient services on top of voice and AI capabilities, and fully integrated with our customers’ business critical tools (CRM, Helpdesk, E-Commerce, …).

Your mission @ Aircall:
Participate in requirements analysis to help with providing the right technical and business solutions for our customers
Have key responsibilities within the design, architecture, and end-to-end delivery of key modules
Write clean scalable code and test and deploy applications and systems
Revise, update, refactor, and debug code
Be part of an engineering organization delivering high quality, secure, voice solutions to Aircall clients
Involvement in product and platform performance optimization and live site monitoring
Participate in an on-call rotation to respond to critical system issues and ensure continuous system reliability
Mentor team members
A little about you:
You have at least 5+ years of experience in backend development with preferably a typed language (Typescript/Node.js, Java, Scala) with a focus on delivering for security, scalability, availability, and performance
You have at least 2+ years of experience working on frontend applications, preferably with React, but experience with Angular is also valued.
You have experience with distributed systems, microservices or serverless architectures.
You have worked extensively with AWS in a production environment and understand how to design for, deploy on and get the best out of, the environment and services provided by Amazon
You can talk easily and spontaneously about most of the offerings on AWS, when to use them, and how, and can explain to junior engineers
Security is at the forefront of your mind in everything that you do