{"id":40532,"url":"https://alion.io/job/radiant-infrastructure-site-reliability-engineer","title":"Infrastructure Site Reliability 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":"DevOps","role_family":"DevOps","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":72000,"max_usd":138000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":54},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"Bash","optional":false},{"name":"DHCP","optional":false},{"name":"DNS","optional":false},{"name":"Grafana","optional":false},{"name":"HPC","optional":false},{"name":"InfiniBand","optional":false},{"name":"ITSM","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"Platform Engineering","optional":false},{"name":"Prometheus","optional":false},{"name":"Python","optional":false},{"name":"TCP/IP","optional":false},{"name":"Ubuntu","optional":false},{"name":"ITIL","optional":true}],"status":"live","first_seen_at":"2026-04-07T15:54:19Z","employer_posted_date":"2026-04-07","last_verified_at":"2026-10-18T08:23:56Z","board_verified":true,"closed_at":null,"days_open":193,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":193},"description":"About Radiant\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 Summary:\nWe’re looking for an experienced Infrastructure Site Reliability Engineer to run and evolve our infrastructure stack. You’ll contribute across bare-metal, virtualization, and orchestration layers,\nkeeping things stable and secure 24/7 x 365 - all while mentoring teammates, improving process and automation as well as helping translate deep technical concepts for a wide range of collaborators and customers.\nWhat You’ll Do :\nDeploy and operate resilient, scalable infrastructure supporting AI/HPC workloads\n\nOptimize Linux system configuration, BIOS/firmware, kernel, and disk subsystem for performance\n\nConfigure, monitor and manage bare-metal infrastructure using IPMI, Redfish, etc\n\nBuild and maintain automation scripts and infrastructure as code to support platform lifecycle, as well as simplifying troubleshooting for Incident resolution and provision of tooling for our support organisation\n\nApply ITSM frameworks: Incident, Major Incident, Change Management, and service improvement.\n\nMaintain and enhance ’s observability stack: Prometheus, Grafana, and custom monitoring integrations\n\nOperate and support services in 24x7 production environments, including on-call rotation\n\nContribute to Incident postmortem analyses, root cause analysis, document learnings, and automate remediations\n\nMentor junior engineers and act as an Operational requirements consultant to other departments\n\nCommunicate technical decisions clearly to non-technical stakeholders and customers\n\nUphold a culture of: do, document, automate\n\nWillingness to cross train with Platform Engineering/Platform SRE to fully support both our infrastructure and platform stacks.\n\nWillingness to cross train with HPC Engineering, supported by NVIDIA to enhance our\n\nHPC supportability offering\n\nWhat you bring:\n5+ Years Proven experience in globally scaled, performance-intensive environments operating to a 24/7 support model\n\nExpert-level Linux administration, especially Ubuntu distributions\n\nProficiency in system tuning, disk I/O optimization, and hardware-level performance tweaks\n\nFamiliarity with Out of Band management tools (IPMI, Redfish, PXE, etc.)\n\nStrong networking fundamentals: TCP/IP, DNS, DHCP, VLANs, routing, switching\n\nStrong experience with infrastructure scripting and automation (Bash, Python, Ansible)\n\nDeep understanding of observability principles and tools (Prometheus, Grafana)\n\nHands-on experience operating orchestration platforms (Kubernetes, MAAS, Tinkerbell)\n\nStrong grasp of ITSM and service operation best practices\n\nExcellent communication and mentorship skills\n\nComfortable interfacing with internal stakeholders and external customers\n\nBonus: Knowledge of HPC workloads and GPU-based infrastructure\n\nBonus: Experience with InfiniBand networks and HPC performance tuning\n\nNice to have:\nBachelor or Masters Level degree in Computer Science, Engineering or related field, or equivalent experience.\n\nLPIC Certifications\n\nITIL Foundation level qualification or equivalent experience\n\nHow you work:\nYou approach problems with a systems mindset - balancing practical execution with long-term scalability\n\nYou elevate the team, setting high standards for technical quality and engineering excellence.\n\nYou hold yourself and others accountable - giving direct feedback and expecting the same\n\nYou take initiative, owning challenges end-to-end and proactively driving solutions.\n\nYou invest in others, mentoring to build both capability and confidence.\n\nYou communicate clearly - translating complexity into clarity across engineering and business audiences\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 feedback: 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":5841,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"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":"2026-04-07T15:54:19Z"}],"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-infrastructure-site-reliability-engineer","json_url":"https://alion.io/job/radiant-infrastructure-site-reliability-engineer.json","meta":{"generated_at":"2026-10-18T09:11:16Z","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":13670,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-19T00:00:00Z"}},"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-infrastructure-site-reliability-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-infrastructure-site-reliability-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-infrastructure-site-reliability-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-infrastructure-site-reliability-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fradiant-infrastructure-site-reliability-engineer"}]}