Senior Software Engineer – Backend/Cloud

Aircall.Io, Inc.; Madrid; On-site; EUR 60,000 - 100,000; Full time

Benefits offered by this job

Competitive salary package

Job summary

Aircall, a unicorn AI-powered customer communications platform, is hiring a Senior Backend Engineer in Madrid. You will design, build, test, and deploy backend systems using TypeScript/Node.js with a strong emphasis on security, scalability, and performance.

Collaborate with product managers, designers, and engineers to deliver end-to-end solutions, mentor teammates, and stay current with evolving architectures and technologies.

Qualifications

• 7+ years in back-end development with TypeScript/Node.js, Python, Ruby or Rails.
• Extensive AWS production experience for high-volume services.
• Experience with React frontend is a plus.
• Ability to design scalable, secure architectures.
• Strong communication and collaboration skills.

Responsibilities

• Create, design, develop, test, and monitor code in production autonomously.
• Collaborate with product managers, designers and engineers to implement end-to-end solutions.
• Design high-quality, secure, scalable solutions and own their execution.
• Understand business needs to provide solutions to users and clients.
• Mentor and promote tech growth within teams.
• Stay up-to-date on new technologies and architectures.

Skills

Backend development

AWS

Node.js/TypeScript

REST/GraphQL APIs

React (frontend)

Communication

Tools

PostgreSQL

DynamoDB

OpenSearch

Redis

Job description

Madrid Office

Aircall is a unicorn, AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, resolve issues faster, and scale customer-facing teams. We're redefining customer communications by bringing voice, SMS, WhatsApp, and AI together into one seamless workspace.

Our momentum comes from a simple idea: help teams work smarter, not harder. Aircall's AI Voice Agent automates routine calls, AI Assist streamlines post-call work, and AI Assist Pro delivers real-time guidance so people can do their best work. The result is higher revenue, faster resolutions, and teams that scale with confidence.

Aircall is headquartered in Paris, our European HQ, with a strong North American presence anchored in Seattle, our North American HQ, and teams across Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. We've built a product customers love and a business that’s scaling quickly, backed by world-class investors and driven by rapid AI innovation across multiple product lines.

At Aircall, you'll join a company in motion. We're ambitious, product-driven, and execution-focused, with visible impact, fast decisions, and real growth.

How we work at Aircall:We're customer-obsessed, data-driven, and focused on delivering meaningful outcomes. We value ownership, continuous learning, and thoughtful speed. If you thrive in a collaborative, fast-moving environment where trust and impact matter, you'll feel at home here.

Key moment to join Aircall in terms of growth and opportunities

Our people matter, work-life balance is important at Aircall

Fast-learning environment, entrepreneurial and strong team spirit

Competitive salary package & benefits

DE&I Statement:

At Aircall, we believe diversity, equity and inclusion - irrespective of origins, identity, background and orientations - are core to our journey.

We pride ourselves on promoting active inclusion within our business to foster a strong sense of belonging for all. We're working to create a place filled with diverse people who can enrich and learn from one another. We're committed to ensuring that everyone not only has a seat at the table but is valued and respected at it by providing equal opportunities to develop and thrive.

We will constantly challenge ourselves to make sure that we live up to our ambitions around diversity, equity and inclusion, and keep this conversation open. Above all else, we understand and acknowledge that we have work to do and much to learn.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

Key Responsibilities:

• Create, design, develop, test, and monitor your code in production autonomously and reliably
• Collaboratewith product managers, designers and other engineers to offer pragmatic solutions to real world problems and implement them end to end
• Work with your team to design high quality, secure, and scalablesolutions and be accountable for their execution
• Obtain a good understanding of the business to provide relevant solutions to users and clients
• Mentor and promote tech growthwithin the teams
• Stay up-to-date on new technologies and architectures, demonstrate good judgment in their potential applications

Qualifications:

A little about you:

• You have at least 7+ experience in back-end development, using TypeScript & NodeJS/Python/Ruby/Rails or other languages, with a focus on delivering for security, scalability, availability, and performance.
• 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).
• Experience working on frontend applications is a big plus, preferably with React.
• Value code simplicity, quality, performance and maintainability.
• Can design pragmatic & simple architectures to solve problems at scale.
• You possess effective and proactive communication skills, and can collaborate with different profiles and roles.
• You do not need to be familiar with all of our technical stack or any specific functional area, but you have a strong willingness to learn and adapt quickly.
• Typescript/Node.js, Python, REST API/GraphQL APIs, Ruby/Rails, ReactAWS/Serverless or EKS, PostgreSQL, DynamoDB, OpenSearch, Redis