Backend Engineer

Air Apps

Backend Software Engineer designing and building Node.js applications at Air Apps. Working closely with cross-functional teams to create scalable backend services.

Posted 4/28/2026full-timeRemote • 🇪🇸 SpainMid-LevelSenior💰 €52,000 - €65,000 per yearWebsite

Tech Stack

Tools & technologies

AWSAzureCloudGoogle Cloud PlatformGraphQLJavaScriptJestMicroservicesNode.jsPostgresTypeScript

About the role

Key responsibilities & impact

Design and build RESTful or GraphQL APIs, microservices, and business logic using Node.js and TypeScript.
Model data and manage queries using Supabase and PostgreSQL, including functions, row-level security, and real-time features.
Deploy and manage services on Google Cloud Platform (GCP), particularly with Cloud Run, Cloud Functions, IAM, and Pub/Sub.
Write clean, testable code using unit, integration, and end-to-end testing frameworks (e.g., Jest). Contribute to code reviews and quality assurance practices.
Implement secure-by-default solutions for authentication, authorization, and data protection, following Clean Code and Clean Architecture principles.
Set up logging, monitoring, and alerting for backend services. Own incident response and uptime improvements.
Participate in architecture discussions, mentor team members, and document your decisions and systems for internal knowledge sharing.

Requirements

What you’ll need

5+ years in backend engineering roles;
Proficiency in Node.js and TypeScript;
Strong experience with Supabase or equivalent PostgreSQL-based backend services;
Hands-on experience with cloud platforms (e.g., GCP, AWS, Azure), including deploying and managing services using serverless compute (e.g., Cloud Run, AWS Lambda, Azure Functions);
Solid knowledge of Clean Code and Clean Architecture practices;
Experience with API design (REST) and cloud-native application development;
Familiarity with CI/CD pipelines, testing tools, and Git workflows;
Strong grasp of security principles, data protection, and compliance best practices;
Effective communicator and proactive team contributor;

Benefits

Comp & perks

Apple hardware ecosystem for work.
Annual Bonus
Top-tier Health and Life Insurance for peace of mind.
Transportation Budget to support your commute needs.
Coverflex benefits package for meal allowances, well-being, and more.
Childcare support.
Air Conference - an opportunity to meet the team, collaborate, and grow together.
Pension Fund to support your long-term financial planning.
Urban Sports Club membership to keep you active.
Meals 100% free at the hub.

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Hard Skills & Tools

Node.jsTypeScriptRESTful APIsGraphQL APIsSupabasePostgreSQLGoogle Cloud PlatformCloud RunCloud FunctionsClean Code

Soft Skills

effective communicatorproactive team contributormentoringarchitecture discussions