IT Systems Architect Principal
BT GroupBudapest, Hungary • Budapest, Hungary
Posted January 9, 2026
Full Time
About the Company
BT Group is the world's first telco, with a heritage in the sector unrivalled. The company is undergoing a transformation of its business, with a focus on digital infrastructure and 5G.
Job Description
BT International is looking for an IT Systems Architect Principal to define and lead the architectural strategy for IT systems and BSS modernization across BT International. The ideal candidate will have a strong engineering background, hands-on experience in software development or systems engineering, and experience leading IT systems and BSS architecture in telecommunications or complex B2B environments.
Requirements
- Define and lead the architectural strategy for IT systems and BSS modernization across BT International
- Establish API-first integration architecture that decouples BSS systems from each other and from product applications
- Lead vendor rationalization strategy across SaaS platforms, on-premise systems, and cloud-based solutions
- Champion modern architecture patterns including microservices, event-driven integration, and API gateways
- Collaborate with Data and AI architects to ensure IT systems generate high-quality data with proper lineage and governance
- Drive architectural governance through design reviews and architecture conformance processes
- Participate in technical spike work and proof-of-concepts to validate architectural decisions
- Provide technical thought leadership on emerging platform architecture trends
Benefits
- Attractive salary
- Cafeteria package - HUF 600,000/year
- Company car / car allowance
- Performance-based bonus
- Comprehensive private health care package
- Nursery support for mothers returning from maternity
- Extended paternity leave: 10+10 day fully paid days
- Commuting allowance
- Home office allowance
- Employee discount opportunities
- Highly affordable mobile packages for the family