{"id":95462,"url":"https://alion.io/job/radiant-cluster-architect","title":"Cluster Architect","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":"staff","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":["GB"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":102000,"max_usd":196000,"period":"year","method":"role_seniority_country_cell","sample_n":12},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"HPC","optional":false},{"name":"InfiniBand","optional":false},{"name":"Linux","optional":false},{"name":"C++","optional":true},{"name":"CUDA","optional":true},{"name":"CUDA Toolkit","optional":true},{"name":"Docker","optional":true},{"name":"Docker Swarm","optional":true},{"name":"Kubernetes","optional":true},{"name":"SLURM","optional":true},{"name":"TCP/IP","optional":true}],"status":"live","first_seen_at":"2026-08-04T13:11:28Z","employer_posted_date":"2026-10-08","last_verified_at":"2026-10-17T15:53:00Z","board_verified":true,"closed_at":null,"days_open":74,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":73},"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.\nAs part of the Infrastructure Solutions team, the Cluster Architect is the tip of the spear leading Radiant’s new GPU deployments. The Cluster Architect contributes to the technical strategy, reference architecture, and governance standards underpinning Radiant's GPU compute platform. They translate the high-level designs provided by the Customer Success organization into fully operational supercomputers. In conjunction with the Datacenter Engineering team, they lead the definition of the low-level design of upcoming high-performance computing (HPC) and artificial intelligence (AI) infrastructure deployments.\nYou must be a solution finder, able to adapt to evolving technology and customer requirements, and be ready to handle scale. The right person for this role will be technically focused and detail-oriented, and able to work with the broader team to successfully deliver some of the world’s largest supercomputers at a rapid pace with precision. It is critical to document each step of the process to enable effective communication with internal and external stakeholders.\nAbout the Infrastructure Team\nThe Infrastructure Engineering team spearheads the strategy, roadmap, and delivery of critical HPC/AI infrastructure to the broader Technology and Customer organizations. Its mission is to deploy scalable, secure, and efficient infrastructure solutions tailored to the organization's strategic needs. The team defines Radiant’s supercomputers’ reference architecture in line with the customer, software, and operational requirements of the company.\nThey work closely with third-party suppliers to provide and maintain the list of technologies that form part of Radiant’s portfolio of offerings.\nThey provide technical support throughout the procurement process with vendors to ensure the suitability of RFI/RFP responses.\nThey work in tandem with OEMs and infrastructure providers during the infrastructure rollout, and providing technical inputs to DC providers and OEMs\nThey work closely with the program management office, and align the hardware infrastructure rollout programs with the parallel datacenter fitout and software engineering programs.\nThey play an instrumental role in the successful deployments of cloud infrastructure, whilst ensuring optimal performance and reliability for high-demand computing environments. Once accepted, the infrastructure solutions are then handed over to the Infrastructure Operations team who manages the daily management of the infrastructure.\nWhat you’ll do\nEngage with key stakeholders (such as the Program Management Office, Data Center Engineering, Solutions Engineering and Infrastructure Operations teams) and translate inputs into Radiant’s reference architecture and low-level designs blueprints.\n\nRemain abreast of technology advancements and roadmaps with key vendors in the space.\n\nLead the low-level design of high-density AI supercomputer systems (compute, interconnect, storage, management).\n\nParticipate in the Architecture Review Board involving key stakeholders to ensure collaboration and company alignment behind the designs being produced.\n\nEvaluate tradeoffs between performance, power, cooling, serviceability, and cost throughout the procurement process.\n\nIn tandem with potential suppliers, drive the creation of detailed low-level designs, including (but not limited to):\nRack elevation diagrams and layouts\n\nData center floor plans and spatial planning\n\nPower distribution and cooling architecture and related detailed specifications\n\nDetailed Bill of Materials (BoM)\n\nPort mapping documents.\n\nDrive thorough technical evaluations and response accuracy from vendors during the RFx processes, ensuring designs are aligned with vendor capabilities and long-lead item constraints.\n\nPlay a hands-on and pro-active role in the manufacturing, burn-in, cabling, logical configuration, benchmarking, and logical implementation of new deployments to turn designs into production-grade systems.\n\nDrive acceptance criteria with quality, reliability, safety, and performance goals in mind.\n\nWork with the Software Engineering and Solutions Engineering teams to ensure the infrastructure supports AI workload requirements.\n\nEngage with project management to define milestones, risks, resourcing, and deliverables associated with the delivery.\n\nProduce accurate architecture diagrams, configuration documentation, runbooks, and operational guidance to facilitate the handover of the new deployments to the Infrastructure Operations team.\n\nEstablish delivery best practices and continuously improve the designs, processes, and documentation through the participation of “lessons learned” workshops.\n\nRequirements\nBSc in Computer Science, Electrical/Computer Engineering, Physics, Mathematics, or other related Engineering fields.\n\n5+ years of solution architecture experience, demonstrating motivation and skills to drive technical design and delivery processes.\n\nDeep expertise in GPU systems, high performance networking (like InfiniBand), including a proven understanding of network topologies and storage architecture.\n\nProficiency in system-level aspects, encompassing Operating Systems, Linux kernel drivers, GPUs, NICs, and infrastructure software solutions.\n\nDemonstrated experience producing detailed infrastructure designs (including network topologies, rack layouts, BoMs, power/cooling planning)\n\nDeep understanding of the interafce between datacenter and GPU supercomputers (power/cooling constraints, failure modes)\n\nGood understanding in datacenter fit-out, datacenter engineering (mechanical, eletrical, constraints)\n\nExcellent interpersonal and communication skills, with a track record interfacing with various types of stakeholders (engineering/operations teams, vendors, etc.) and writing clear deliverables.\n\nComfortable working in fast-moving, high-complexity technical environments.\n\nNice to have\nPrior work experience in HPC, Telco, or hyperscale supercomputing environments designing, delivering, and/or operating large scale HPC systems.\n\nWork or research experience in networking fundamentals, TCP/IP stack, and data center designs.\n\nFamiliarity with monitoring/telemetry systems and observability for infrastructure health.\n\nDemonstrated expertise in cloud orchestration software and job schedulers, including platforms like Kubernetes, Docker Swarm, and HPC-specific schedulers such as Slurm.\n\nKnowledge of DevOps/MLOps technologies such as Docker/containers, Kubernetes, datacenter compute/network/storage deployments.\n\nHands-on experience with NVIDIA systems/SDKs (e.g., CUDA), NVIDIA Networking technologies (e.g., DPU, RoCE, InfiniBand), ARM CPU solutions, coupled with proficiency in C/C++ programming, parallel programming, and GPU development.\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":9021,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Annual leave","Health insurance"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"},{"name":"London","iso":null,"kind":"city"}],"hiring_excludes":[],"relocation_offered":false,"industries":["MLOps","AI Compute & Inference"],"lifecycle":[{"event":"open","at":"2026-08-04T13:11:28Z"}],"visa":[],"liveness":{"score":30,"band":"fade","label":"Fading","p_open":1,"p_active":0.671,"p_room":0.44,"age_days":73,"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-cluster-architect","json_url":"https://alion.io/job/radiant-cluster-architect.json","meta":{"generated_at":"2026-10-17T16:18:21Z","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":22372,"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-cluster-architect"},{"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-cluster-architect"},{"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-cluster-architect"},{"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-cluster-architect\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fradiant-cluster-architect"}]}