Senior Software Developer

OverviewWELCOME TO SITAAt SITA, we keep airports moving, airlines flying smoothly, and borders open. Our technology and communication innovations power the success of the global air travel industry.
You'll find us in 95% of international airports, working closely with over 2,500 transportation and government clients. Each partnership brings unique challenges, and we thrive on delivering fresh solutions and cutting-edge tech to keep operations running like clockwork. We don't just move the world forward-we're proud to be recognized as a Great Place to Work® by 79% of our employees and certified in most of our growing locations. Here, we feel empowered, supported, and inspired to grow.
Are you ready to love your job?The adventure begins right here, with you, at SITA.
PURPOSESITA For Aircraft is looking for a talented Senior Software Developer to join a strategic modernization program focused on the next generation of Datalink observability, monitoring, provisioning, and configuration management systems. Based in Barcelona and collaborating with the Montreal engineering team, you will design, build, test, and maintain software applications that transform how Datalink services are monitored, configured, and operated across SITA's global infrastructure. Working on well-scoped components, you will collaborate with analysts, testers, and software engineers to write high-quality, maintainable code and ensure solutions meet functional and non-functional requirements. The ideal candidate brings solid software development experience, hands-on knowledge of observability tooling, and a drive to apply modern AI-powered techniques to system development challengesKEY RESPONSIBILITIESSystem Software Development Analyze and identify areas of improvement for legacy system software. Contribute to the development of new Datalink Monitoring, Observability, Provisioning, and Configuration Management applications. Write high-quality, maintainable code that meets functional and non-functional requirements and following SITA guidelines, including performance, scalability, and security policies. Apply AI-powered development tools to improve coding efficiency, code quality, and documentation generation. Testing & Quality Assurance Design and perform software tests for Datalink applications, monitor and diagnose performance issues. Monitor, identify, and correct software defects to maintain fully functioning applications. Respond to performance issues and contribute to the improvement of system reliability and maintainability. System Roadmap & Modernization Contribute to and help maintain the development backlog ensuring work is prioritized in line with business and operational requirements. Support the modernization of legacy monitoring and configuration management assets while maintaining operational continuity. Ensure developed components are resilient, scalable, and aligned with long-term system evolution goals. Collaboration & Communication Work closely with software engineers, architects, analysts, testers, product managers, and operations teams. Share information openly, stay in sync with team members, and contribute to a collaborative, ownership-driven team culture. Promptly communicate relevant updates, risks, and progress with the right level of detail for the audience. Security, Documentation & Compliance Implement required security measures and contribute to secure-by-design practices within system development. Create and maintain technical and user documentation to a high standard; leverage AI tools to support documentation quality and efficiency. Identify instances of non-compliance with SITA's policies and procedures and report or escalate appropriately. QualificationsEXPERIENCE10+ years experience as a Software Developer, Software Engineer, or equivalent in a professional software development environment, working on large scale real-time and/or critical systems.. Strong software development experience with .
NET 8, 10 and C# in Windows environment. Hands-on experience with container orchestration and modern observability ecosystems in Linux production environment, including Grafana Labs tools such as Alloy, Loki, Mimir (or Prometheus), Grafana, and OpenTelemetry Protocol. Experience in software integration, configuration management, APIs (REST, SNMP, TCP/IP, UDP), microservices, and backend systems in a distributed systems context. Solid understanding of software architecture principles, modern programming paradigms, and event-based systems (Kafka). Strong problem-solving skills and the ability to collaborate effectively in an international, distributed engineering environment. Experience writing high-quality, maintainable and testable code, and contributing to code and design reviews. Understanding SOLID and  Clean Code principles is an asset. Hands-on experience with AI-powered development tools for coding assistance, test automation, or documentation generation. Fluent in professional English EDUCATIONUniversity Degree i