Temporary Architect Load Test - C

About Proximus NXT

Proximus NXT Luxembourg supports all organizations in their digital transformation, by providing holistic ICT & Telecommunication solutions, as well as tailored managed services. With our partners and customers, we co-create opportunities and enable growth in a secure and sustainable manner. As a result of our unique expertise in next-gen IT services, mobile and advanced connectivity, we help our customers achieve their ambitions and realize their vision.

Together with them and our partners we implement sovereign and trusted solutions that make people work smarter.– www.proximusnxt.lu

Your mission :

We are seeking a highly skilled and experienced architect to establish and guide the technical foundation for our enterprise-wide performance testing capabilities. You will be responsible for 
designing, evolving, and maintaining the technical architecture of the Load Testing service and ensuring architectural coherence, scalability, and alignment with our enterprise strategy.
This role will work in a squad-based model in partnership with a Service/Product Owner, DevOps engineers, and operational staff, while collaborating across the broader enterprise. The  role requires balancing innovation with operational stability, managing legacy systems while 
planning future capabilities, and ensuring compliance with security and regulatory requirements throughout all architectural decisions.

Key Responsibilities
Architecture Design & Evolution
• Design and maintain the technical architecture for the Load Test Service, including LoadRunner infrastructure, cloud-based testing environments, and integration points  with enterprise services.
• Design high availability configurations for test controllers and load injectors.
• Define sizing requirements for on-premises and cloud-based test environments.
• Develop and document architecture diagrams, workflows, and integration specifications.
• Define and implement service design principles ensuring scalability, reliability, and performance.
• Plan and execute migration strategies for new LoadRunner versions and tool upgrades.
• Assess and implement cloudification strategies (AWS, Azure, OVH) for load testing infrastructure.

Technical Standards & Governance
• Ensure architectural coherence across all Load Test Service components.
• Define and enforce security standards, RBAC policies, and compliance requirements.
• Maintain the CMDB data model for Load Test Service configuration items.
• Conduct security risk assessments and develop mitigation plans.
• Ensure alignment with sovereignty requirements and compliance frameworks.
• Review and approve architectural decisions related to tool selection and technology stack.

Innovation & Technical Leadership
• Identify and evaluate emerging technologies (AI/ML for test optimization, automated testing frameworks).
• Conduct proof-of-concepts for new testing approaches and tools.
• Provide technical guidance on extending service capabilities (API testing, regression testing, smoke testing).
• Act as technical subject matter expert for Load Test Service capabilities.

Documentation & Knowledge Transfer
• Produce and maintain comprehensive architecture documentation.
• Develop Standard Operating Procedures (SOPs) and troubleshooting guides.
• Create workflow documentation outlining automation processes and dependencies.
• Document integration patterns and best practices.
• Ensure knowledge transfer within the squad and to stakeholders.

Collaboration & Stakeholder Management
• Work with Service Owner to align technical solutions with business requirements.
• Collaborate with nfrastructure teams on environment provisioning and network configuration.
• Engage with Security teams to ensure compliance with security frameworks.
• Participate in Architecture Review Board governance processes.
• Support feasibility studies for large, customised test requests.

Your profile :

Technical Expertise
• Deep knowledge of performance and load testing architectures and methodologies
• Proven ability to design scalable, high-availability systems
• Expert-level proficiency with LoadRunner (Professional and Enterprise editions)
• Strong understanding of application performance testing tools and frameworks
• Experience with cloud infrastructure and hybrid cloud architectures
• Proficiency in virtualisation technologies (VMware, containers, Kubernetes)
• Knowledge of monitoring and observability platforms (Dynatrace, APM tools)
• Understanding of network architecture and load distribution patterns
• Experience with CI/CD pipelines and DevSecOps practices
• Ability to balance technical excellence with practical implementation constraints
• Experience designing API-first and event-driven architectures

Tools & Technologies
• LoadRunner Professional and Enterprise
• Cloud platforms: AWS, Azure, OVH
• Virtualisation: VMware, Kubernetes, Docker
• Monitoring: Dynatrace, APM solutions
• ITSM: ServiceNow
• Configuration management: Ansible, Terraform
• Version control: Git, GitLab
• Operating systems: Windows Server, Linux (RHEL, Ubuntu)

Requirements
• EU Citizenship. 
• Fluent in English (written and spoken)

Our offer :

A professional and stimulating work environment in the IT & telecom sector. Multiple career opportunities within the Proximus Group at national and international level, cutting-edge training in new technologies, a wealth of recognized expertise. We also offer an attractive salary package and many other benefits.

Our company is an equal opportunity employer, valuing diversity in all its forms. We firmly believe that each individual brings a unique richness to our teams, and we are committed to creating an inclusive environment where every voice counts.

If at the end of the process your application is successful, you will be asked to provide an extract from your criminal record. Your personal information will be handled in compliance with applicable data protection laws.