{"id":40533,"url":"https://alion.io/job/radiant-senior-network-engineer","title":"Senior Network Engineer","company":{"id":8822,"name":"Radiant","domain":"radiant.com","url":"https://alion.io/company/radiant","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":92,"open_postings":16,"ghost_share":0,"stale_share":0.313,"repost_share":0,"time_to_fill_p50_days":56,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Networking","role_family":"Networking","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":68000,"max_usd":119000,"period":"year","method":"role_seniority_country_cell","sample_n":8},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"BGP","optional":false},{"name":"Calico","optional":false},{"name":"Cilium","optional":false},{"name":"Configuration Management","optional":false},{"name":"gRPC","optional":false},{"name":"HPC","optional":false},{"name":"Incident Management","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"MPLS","optional":false},{"name":"Python","optional":false},{"name":"Service Mesh","optional":false},{"name":"Terraform","optional":false},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"Grafana","optional":true},{"name":"InfluxDB","optional":true},{"name":"Prometheus","optional":true},{"name":"Time Series Forecasting","optional":true}],"status":"live","first_seen_at":"2026-04-07T12:04:12Z","employer_posted_date":"2026-04-07","last_verified_at":"2026-10-17T15:53:00Z","board_verified":true,"closed_at":null,"days_open":193,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":192},"description":"Company Overview:\nRadiant is redefining how AI infrastructure is built.\nWe design and operate AI-native cloud platforms engineered for sovereignty, performance, and scale. Our infrastructure powers GPU-native workloads, multi-tenant control planes, and high-performance AI systems designed for the most demanding environments.\nWe are not building a generic cloud. We are building purpose-built AI infrastructure - from powered land, to compute, to software .\nAs we scale our platform and expand our engineering organisation, we are looking for leaders who can build strong teams, uphold high standards, and deliver reliably at pace.\nJob Description\nAs a Senior Network Engineer, you’ll design, deploy, and operate the high-performance, low-latency network fabric that underpins our GPU infrastructure. You’ll play a critical role in shaping the architecture, automation, and operational standards of our network, ensuring it meets the rigorous demands of modern AI training and inference workloads.\nThe ideal candidate is a strong advocate of engineering excellence and operational best practices. You’re customer-focused, collaborative, and equally comfortable discussing technical issues with enterprise customers, internal teams, and cross-functional stakeholders. You’ll contribute to everything from design and implementation through to L3/L4 operational support.\nRole Responsibilities\nNetwork Architecture & Collaboration: Design scalable leaf-spine networks using Mellanox switches with Cumulus Linux, integrated with Juniper PTX routers and SRX firewalls. Lead 3rd party and internal provider collaboration to deploy resilient site-to-site and internet connectivity, optimise topology, and resolve complex faults.\n\nOperations & Maintenance: Perform configuration, upgrades, and deep troubleshooting of Juniper and NVIDIA/Cumulus devices in production environments.\n\nSoftware-Defined Networking (SDN): Implement programmable network designs using controller-based platforms to support automation and scalability.\n\nKubernetes Networking: Support networking within container platforms using CNIs such as Calico, Cilium, or Kube-OVN. Understand microservices traffic patterns and service mesh integrations.\n\nAutomation & Scripting: Develop and maintain Ansible playbooks and Python automation for configuration management, provisioning, and compliance, including working against API interfaces of network equipment.\n\nMonitoring & Telemetry: Implement observability tools using SNMP, sFlow, and gRPC to detect and address network bottlenecks at scale.\n\nIncident Management: Lead L3/L4 network incident response, escalation management and root cause analysis in high-pressure, 24×7 production environments.\n\nStakeholder & Customer Engagement: Act as a trusted technical expert, engaging directly with internal stakeholders and enterprise customers. Present solutions and troubleshoot effectively across all levels of the organisation.\n\nEngineering Excellence: Promote and uphold best practices in configuration management, change control, documentation, and continuous improvement.\n\nRequirements\nHPC/AI Networking: 3-5 years’ experience supporting high-throughput, low-latency infrastructure for GPU-based or HPC clusters.\n\n8-12+ years in networking, often with at least 5 years in globally distributed environments\n\nExperience with multi-region or multi-continent backbone networks, transit/peering, and high-availability design at Internet scale\n\nHands-on with large-scale routing (BGP/MPLS), automation at scale, and often SDN or custom orchestration frameworks\n\nRouting & Switching: Strong understanding of BGP, EVPN, VXLAN, and Data Centre Interconnects (DCI).\n\nHardware Platforms:\n\nCloud-Native Networking: Proficiency with Kubernetes networking and container-based infrastructure, including CNIs (e.g. Calico, Cilium).\n\nLinux Proficiency: Confident with CLI environments, scripting, and diagnostics.\n\nAutomation & Tooling: Experience with Ansible and Python. Familiarity with Terraform or similar infrastructure-as-code tools is a plus.\n\nCustomer-Facing Skills: Comfortable explaining complex networking concepts to customers and internal stakeholders, from engineers to executives.\n\nOperational Support: Hands-on experience in L3/L4 support within production environments, driving root cause and preventative measures.\n\nEngineering Discipline: Strong proponent of code quality, peer reviews, change control, and infrastructure versioning.\n\nMellanox Ethernet switches with Cumulus Linux\n\nJuniper PTX core routers and SRX firewalls\n\nPreferred Qualifications\nIndustry certifications such as JNCIE, CCIE, or equivalent.\n\nFamiliarity with network security frameworks and best practices.\n\nExperience with hybrid cloud and cloud connectivity solutions (e.g. AWS/Azure Direct Connect).\n\nExposure to observability platforms and time-series databases (e.g. Grafana, Prometheus, InfluxDB).\n\nQualities we look for:\nSet the standard: Every single day, you spot opportunities to constructively shake things up.\n\nInspire the change: There's no blueprint for the future. You’ll embrace challenges and change.\n\nYou’re real and you’re true to yourself: We cherish and celebrate diversity so you’ll feel right at home whoever you are and whoever you’re talking to, you treat everyone the same.\n\nWhy should you join us?\nWhat sets us apart is our blend of modern technology, competitive benefits, and an open, welcoming work culture that enables our people to thrive.\nHere are just some of the great things you can expect from us:\n25 days of annual leave\n\nA culture that emphasises results over hierarchy, process & ego: we place great emphasis on the quality, ingenuity and creativity of work.\n\nOpen communication, regular feedbac k: we value smooth collaboration, direct and actionable feedback, and believe that leading with empathy and a growth mindset makes us better together.\n\nLearning Time: we all have dedicated learning time to focus on new skills, projects or interests that lay outside of your day-to-day job.\n\nHealth & Wellbeing: we want everyone to feel healthy and happy, so we offer private medical insurance via Bupa.\n\nCycle to Work Scheme: we're committed to building a sustainable business, so we encourage cycling to work.\n\nGympass subscription to a variety of gyms and wellbeing apps\n\nParticipation in the company shares program\n\nEnhanced parental pay & leave\n\n Diversity, Equality, Inclusion and Belonging\nWe are an equal opportunity employer and we strive to reduce unconscious bias throughout our hiring process. All applicants will be considered for employment without attention to ethnicity, religion, sexual orientation, gender identity, family or parental status, national origin, veteran, neurodiversity status or disability status. To ensure our recruitment processes provide an equal opportunity for all applicants to succeed, we encourage you to let us know if there are any adjustments that we can make.","description_format":"text","description_chars":6925,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Annual leave","Health insurance"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["MLOps","AI Compute & Inference"],"lifecycle":[{"event":"open","at":"2026-04-07T12:04:12Z"}],"visa":[],"liveness":{"score":13,"band":"cold","label":"Long shot","p_open":1,"p_active":0.473,"p_room":0.28,"age_days":192,"expected_fill_days":56,"reasons":["conf:3","velocity","win:tail","crowd:"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/radiant-senior-network-engineer","json_url":"https://alion.io/job/radiant-senior-network-engineer.json","meta":{"generated_at":"2026-10-17T19:07:36Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":2289,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":8822},"rest":"https://alion.io/mcp/rest/get_company?id=8822"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fradiant-senior-network-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fradiant-senior-network-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fradiant-senior-network-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/radiant-senior-network-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fradiant-senior-network-engineer"}]}