Senior Cloud Network Engineer - Active UK Government Security Clearance Required

About this role

About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy, helping organisations modernise infrastructure, improve reliability, and adopt cloud-native practices that enable long-term, sustainable delivery. Our engineering capability spans AWS, Azure, platform engineering, networking, software, data, AI, delivery, and managed services. We work across complex, high-impact environments in both the public and private sector, delivering solutions where security, resilience, scalability, and operational excellence are critical. About the Role We’re hiring a Senior Cloud Network Engineer to join Appvia on a new secure public sector engagement, supporting and evolving critical network infrastructure across cloud and on-premises environments. This is a senior, hands-on role combining live service and operational support with network design, technical change, automation, and continuous improvement. You’ll take ownership of more complex networking challenges, helping shape solutions from requirements and design through to implementation and ongoing operation. We’re particularly interested in engineers who have developed strong AWS networking expertise alongside traditional enterprise networking skills. Longer term, Appvia will support you in continuing to develop across cloud and platform engineering as part of your progression within the business. Interview Process - 3 Stage Discovery conversation with Talent Acquisition Technical Interview with Engineering Team Final Interview with Leadership Important You must hold active UK Security Clearance (SC). NPPV3 clearance is highly desirable. Requirements Requirements About You You are an experienced Network Engineer with strong cloud networking knowledge, comfortable working across complex, highly available environments from design through to live operation. You will bring: Strong experience designing, implementing, and supporting enterprise network environments Deep understanding of routing and switching, including BGP, OSPF, MPLS, VLANs, and VRFs Strong Cisco networking experience, ideally including ACI / Nexus Experience designing and operating cloud networking environments Strong understanding of network security, firewalls, VPNs, and secure connectivity Experience troubleshooting complex production networking issues and leading root-cause analysis Infrastructure-as-code and network automation experience Experience working in live service, operational, or managed-service environments Confidence producing and reviewing network designs and technical documentation Strong stakeholder communication and consulting skills Active UK SC clearance Responsibilities Design, implement, support, and improve secure network infrastructure across cloud and on-premises environments Own complex network incidents, troubleshooting, and root-cause analysis Lead planned network changes, upgrades, migrations, and optimisation activities Design and support routing, switching, firewalling, VPN, and load-balancing solutions Support resilient connectivity across hybrid cloud and data-centre environments Use automation and infrastructure-as-code to improve repeatability and operational efficiency Contribute to high-level and low-level network designs and technical documentation Monitor and improve network availability, performance, resilience, and security Identify opportunities to simplify legacy network solutions and reduce operational risk Work closely with engineering, service management, architecture, and customer teams Provide technical guidance and support to other engineers Technical Skills Core technologies / experience: AWS networking Cisco networking BGP / OSPF MPLS Cisco ACI / Nexus Firewalls and network security VPN / IPSec Hybrid cloud networking Load balancing Infrastructure-as-code and automation Enterprise networking in high-availability production environments AWS networking experience could include: VPC architecture and routing Transit Gateway Direct Connect Route 53 Multi-account network architectures Hybrid connectivity Network security and segmentation Load balancing Cloud network monitoring and troubleshooting Nice to have: AWS Certified Advanced Networking - Specialty AWS Solutions Architect certifications Azure networking - VNets, ExpressRoute, Azure Firewall Terraform Ansible Python Cisco SD-WAN / SDA Netscaler / F5 VMware NSX Check Point / Palo Alto CCNP / CCIE or equivalent NPPV3 clearance Benefits Why join Appvia? We are a self-funded, London based startup; providing businesses with a fast and secure way to deploy containerised applications into the cloud. We are on a mission to enable organisations to make cloud-based software delivery simple and efficient, whilst having the insights into costs, security and cadence. As a company that holds customers at the heart of everything we do, we are looking for candidates that want to make a real change to how Dev and Ops is working in the industry. With us our customers, like the UK’s Home Office & Bank of England, are harnessing cloud-native technologies, limiting the challenges of infrastructure management and rapidly delivering digital products. What’s on offer? ⚖️ Work-life balance Flexible working with core hours of 10-4pm because we know life happens outside of work Hybrid working - only one compulsory office day per month 25 days’ holiday a year, plus bank holidays An additional day off for your birthday Enhanced maternity and paternity to full pay Workplace Nursery Benefit to help working parents 💚 For your well-being Full Private Healthcare cover for you with partners and children covered 50% Death in Service Cycle to Work scheme Electric Car Scheme Pension plus a salary sacrifice option for even greater savings Employee Assistance Programme Free hygiene products available in the London office 🧠 Mental health support Free therapy through AXA Access to the Headspace App Trained Mental Health First Aiders 😃 Other fun perks Learning budget of £1,000 a year Your o