Application Delivery & Load Balancing Engineer in Belfast

About the Company

Telefónica Tech is a leading provider of innovative tech services for the B2B market with a worldwide presence and strategic hubs in Spain, Brazil, UK and Germany. The company helps leading brands and organisations across the UK and Ireland unlock the power of integrated technology for all businesses, bringing together the best people, the best tech and the best platforms in a simplified manner, to make a real difference to every business, every day.

Role Purpose

The Application Delivery & Load Balancing Engineer will contribute to the design, development, optimisation, and operational management of our client’s Epic EPR solution at the load balancing and presentation layers. This includes ensuring secure, resilient, and high‑performance access to Epic for clinical and operational users across the organisation, leveraging expertise in load balancing technologies such as NetScaler, as well as Citrix, VMware Horizon, and related infrastructure components to underpin the Epic environment. The role ensures that these services are secure, resilient, and fit for purpose, supporting organisational objectives through high‑quality technical knowledge and experience, strong service management practices, and the application of recognised engineering standards. The postholder manages complex technical activities related to Epic application delivery and availability alongside Epic experts, contributing to platform optimisation strategy, and provides expertise in the deployment and management of load balancing for secure, efficient access. The role also supports compliance, risk management, and continuous improvement across the environment, ensuring robust and seamless delivery of Epic services to end users. The engineer provides subject matter expertise for the architecture, design, and lifecycle planning of end user and application delivery platforms, with a keen emphasis on the Epic ecosystem and its associated load balancing configurations.

Key Responsibilities

• Serve as an expert in the support of application delivery and architecture, primarily NetScaler (Citrix ADC) as well as Citrix, and VMware Horizon presentation platforms.
• Ensure stability and performance of Epic access layers.
• Lead resolution of complex incidents and provide escalation guidance.
• Maintain comprehensive documentation for architectures, configurations, and support procedures.
• Ensure compliance with security policies and regulatory requirements.
• Oversee certificate management, integrations, TLS hardening, and secure configurations.
• Support risk assessment and mitigation for external access platforms.
• Contribute to development and update of disaster‑recovery strategies.
• Lead testing and validation to meet recovery objectives.
• Work with various teams to ensure coordinated service delivery.
• Advise on projects and technical stakeholder access implications.
• Contribute to change governance and execution across platforms.
• Contribute to service enhancements, capacity planning, technology refresh, and tuning.
• Assess emerging technologies to recommend improvements in access, reliability, and clinician experience.

Technical Competencies

• Deep expertise in load balancing technologies such as NetScaler, as well as Citrix and VMware Horizon presentation platforms.
• Advanced knowledge of virtualisation, identity management, certificates, and secure platform design.
• Provide technical direction and resolve cross‑stack issues.
• Contribute to scalable, secure architectures for Epic presentation layer designs.
• Produce high‑quality technical documentation.
• Apply best practices and architectural frameworks.
• Stay current on security standards and threats.
• Align activities with compliance requirements.
• Integrate security throughout engineering processes.
• Provide training on Epic applications to the postholder.

Qualifications

Essential

• Deep expertise within Citrix NetScaler/ADC, including configuration, optimisation, and troubleshooting in enterprise environments.
• Demonstrable experience delivering highly available, low‑latency access at enterprise scale.
• Strong understanding of authentication services, certificates, TLS, and secure access patterns.
• Strong communication and documentation skills, with ability to produce clear technical documentation for diverse audiences.
• Proven experience in incident management, escalation procedures, and resolution of complex technical issues.
• Knowledge of change governance, change management processes, and controlled deployment methodologies.

Desirable

• Strong working knowledge of Citrix or Omnissa/VMware Horizon environments and their integration with access platforms.
• Professional certifications such as Citrix CCE‑V/CCP‑V, Citrix ADC, or VMware VCP.
• Experience in regulated, enterprise‑scale, or public sector healthcare managed services environments.
• Knowledge of ITIL processes, structured change management, and service management best practices.
• Experience with disaster recovery planning, testing, and validation to meet recovery objectives.
• Familiarity with Epic EHR systems and their integration with application delivery platforms.
• Experience in capacity planning, performance tuning, and technology refresh initiatives.

Additional Information

Training on Epic applications available to the postholder. You must be based in the UK and be eligible to pass BPSS checks.

Equality & Diversity

At Telefónica Tech, we believe inclusion is the bridge that empowers everyone to be their authentic selves. We celebrate and respect our differences because diversity drives innovation and makes us stronger. We welcome applicants from all backgrounds and identities regardless of age, disability, gender reassignment, marital or civil partnership status, pregnancy or maternity, race, religion or belief, sex, and sexual orientation. We are also committed to equity, accessible hiring practices, and creating an inclusive culture through many means including TogetHer (Women's network) and our employee resource groups which include Diversity and Inclusion, Telefónica Tech Pride, Neurodiversity, ELEVATE (African and Caribbean heritage network), and Sustainability. We don’t believe hiring is a tick box exercise, so if you feel that you don’t match the job description 100% but would still be a great fit for the role, please get in touch.