Senior Software Engineer - Madrid

This position is posted by Jobgether on behalf of Aircall. We are currently looking for a Senior Software Engineer in Madrid.

Join a fast-growing, international tech environment where you’ll play a key role in designing and deploying scalable and secure back-end systems. This position involves high-impact work on a critical team responsible for Authentication and Authorization, leveraging cutting-edge tools like TypeScript, Node.js, AWS, and GraphQL. You’ll contribute to performance optimization, guide architecture decisions, and mentor junior developers — all while thriving in a collaborative, fast-paced atmosphere that values innovation, autonomy, and continuous learning.

Accountabilities:

• Design, build, and maintain scalable back-end services using TypeScript and Node.js within a serverless AWS environment.
• Develop and maintain features related to authentication and authorization (SAML, SSO, OAuth 2.0).
• Utilize GraphQL as Backend-for-Frontend (BFF) architecture to improve integration with customer-facing applications.
• Monitor and optimize platform performance and contribute to the reliability of mission-critical systems.
• Participate in the full software development lifecycle — from requirements gathering and architecture through testing, deployment, and maintenance.
• Take part in on-call rotations to ensure system reliability and address incidents promptly.

Mentor junior engineers and advocate for engineering best practices across teams.

• 7+ years of experience in back-end development with expertise in TypeScript and Node.js.
• Strong hands-on experience with AWS services (Lambda, Cognito, SNS, SQS, DynamoDB, API Gateway) in production environments.
• Solid understanding of secure, scalable, and high-performance systems and architectures.
• Strong grasp of software engineering principles including Clean Code, Test Driven Development (TDD), and Continuous Integration/Deployment.
• Familiarity with collaboration and version control tools (Jira, Confluence, GitHub, GitLab).
• Experience with Domain-Driven Design (DDD) is a plus.
• Strong communication skills with the ability to work cross-functionally in a multicultural team.

• 🚀 Join at a key moment of rapid growth and innovation.
• 💆 Work-life balance is a priority with a supportive and flexible culture.
• 📚 Access to a fast-learning environment with an entrepreneurial spirit.
• 🌍 Work with a team from 45+ nationalities in a diverse, inclusive workplace.
• 💶 Competitive salary and comprehensive benefits package.

Jobgether is a Talent Matching Platform that partners with companies worldwide to efficiently connect top talent with the right opportunities through AI-driven job matching.
When you apply, your profile goes through our AI-powered screening process designed to identify top talent efficiently and fairly.

🔍 Our AI evaluates your CV and LinkedIn profile thoroughly, analyzing your skills, experience and achievements.
📊 It compares your profile to the job’s core requirements and past success factors to determine your match score.
🎯 Based on this analysis, we automatically shortlist the 3 candidates with the highest match to the role.
🧠 When necessary, our human team may perform an additional manual review to ensure no strong profile is missed.

This process is transparent, skills-based, and free of bias — focusing solely on your fit for the role.
Once the shortlist is completed, we share it directly with the company that owns the job opening. The final decision and next steps (such as interviews or additional assessments) are then made by their internal hiring team.

Thank you for your interest!

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