This list contains only the countries for which job offers have been published in the selected language (e.g., in the French version, only job offers written in French are displayed, and in the English version, only those in English).
The Business Systems Architect Principal is central to BT International’s transformation from traditional telco operations to asset-light service delivery excellence. This role owns the architectural vision for BAU systems (sales, service, enterprise) and service operations transformation (AI Ops, Service Desk, L2C, billing, inventory) that directly impact operational efficiency, cost-to-serve and customer satisfaction. This architect ensures legacy systems remain cost-effective whilst establishing future-ready capabilities for NaaS-based operating model. This position leads business systems modernisation, establishes API-first integration patterns across service operations and collaborates with senior stakeholders. By aligning business systems architecture with BTI transformation imperatives and multi-year efficiency programmes, the role ensures BT International remains competitive, agile and customer-focused in a rapidly evolving global landscape.
Job Responsibility:
Define and lead the architectural strategy for business systems across BAU applications (sales, service, enterprise) and service operations (AI Ops, Service Desk, L2C including Pricing/Design/Quoting/SRM, billing, inventory), establishing target state architecture that optimises legacy systems whilst designing future-ready capabilities
Own the business systems portfolio optimisation roadmap, making strategic keep/modernise/retire decisions for BAU systems and service operations platforms based on technical fitness, cost-effectiveness and alignment with asset-light, NaaS-based operating model
Establish systems integration approaches that link together BAU applications, service operations platforms and NaaS capabilities, enabling functional operation across sales, service and enterprise systems whilst supporting business processes
Lead vendor strategy for business systems platforms including SaaS applications, enterprise systems and service operations tools, negotiating strategic partnerships that simplify IT landscape whilst aligning with aaS business needs and reducing vendor dependencies
Champion modern architecture patterns including service operations automation, AI-driven process optimisation, billing automation, inventory accuracy improvement and self-service capabilities that reduce manual propensity and improve cost-to-serve metrics
Design for operational excellence by establishing comprehensive observability across business systems including metrics, logging, distributed tracing and telemetry that enable proactive issue detection and support continuous improvement in service delivery
Collaborate with Data and AI architects to leverage data platforms and AI capabilities for business intelligence, service automation and customer insights, ensuring business systems generate valuable data and support AI-driven process improvements
Drive architectural governance through design reviews and architecture conformance processes, ensuring business systems initiatives align with enterprise standards, security requirements and support transformation to asset-light operating model
Build and mentor Business Systems architects who work with BAU operations and service delivery teams, establishing technical leadership capability and fostering architectural thinking across support, maintenance and enterprise systems functions
Work with engineering leadership to establish integration patterns that connect business systems with NaaS capabilities, enabling sales and service operations to leverage network-as-a-service whilst maintaining operational stability and cost-effectiveness
Requirements:
Strategic Architecture Leadership – Proven ability to define and communicate architectural vision for complex business systems landscapes, with track record driving large-scale transformation programmes in regulated telco environments
Business Systems Domain Expertise – Deep understanding of BAU systems (sales, service, enterprise applications) and service operations platforms (service desk, AI Ops, lead-to-cash, billing, inventory) with knowledge of how these capabilities support business operations and cost optimisation
Systems Integration – Extensive experience linking together various IT systems, services and software across BAU applications, service operations platforms and NaaS capabilities to enable functional operation and support business processes
Vendor and Stakeholder Management – Strong ability to work with SaaS platforms and enterprise vendors as strategic partners, negotiate technical implementations and manage complex stakeholder relationships across business and operational teams
Modernisation Patterns – Expert knowledge of incremental modernisation approaches including service operations automation, AI-driven process optimisation and cloud-native patterns that balance operational continuity with transformation
Technical Depth – Hands-on background in business systems integration and service operations with coding capability, enabling credibility with engineering teams and active participation in technical spikes when needed
Operational Excellence – Understanding of comprehensive observability, service resilience and operational automation approaches including metrics, logging, distributed tracing and telemetry pipelines for business systems
NaaS Integration Understanding – Knowledge of how BAU systems integrate with network-as-a-service models, enabling sales and service operations to leverage aaS capabilities whilst maintaining operational stability
Leadership and Influence – Ability to lead blended IT teams (support, maintenance, BAU systems, service operations) through transformation, build consensus across organisational boundaries and develop technical leadership capability in operational functions
Extensive experience leading IT systems and BSS architecture in telecommunications or complex B2B environments, with demonstrated success modernizing legacy landscapes across multiple system domains
Proven track record defining and executing architectural strategies that enabled large-scale system rationalization, vendor consolidation and platform transformation while maintaining business continuity
Significant experience establishing API-first integration architectures in complex enterprise environments, including work with API management platforms, event streaming and microservices patterns
Strong background working with major enterprise platforms (Salesforce, ServiceNow, Microsoft) and telco-specific BSS vendors, including negotiating technical approaches and influencing vendor roadmaps
Experience building and leading architecture teams, with track record developing technical leadership capability and establishing architectural practices that scale across product engineering organizations
Demonstrated success working in product operating models and agile contexts, with understanding of how architecture enables rather than constrains product team autonomy and delivery velocity
Background in telco operations and BSS domains with deep understanding of the technical and organizational challenges in transforming mission-critical systems that directly impact revenue
What we offer:
Cafeteria package - HUF 600,000/ year
Performance-based bonus
Comprehensive private health care package for all the employees, which can be extended to family members
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 as well
New high-class offices both in Budapest and Debrecen
Wide-range of company and community programmes (including support for different sport activities)