{"id":4018890,"url":"https://alion.io/job/radiant-principal-software-engineer-storage","title":"Principal Software Engineer - Storage","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":"B","score":80,"open_postings":5,"ghost_share":0,"stale_share":0.8,"repost_share":0,"time_to_fill_p50_days":49,"computed_at":"2026-11-10T06:52:35Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Gloucester, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon S3","optional":false},{"name":"Go","optional":false},{"name":"HPC","optional":false},{"name":"IAM","optional":false},{"name":"Kubernetes","optional":false},{"name":"MinIO","optional":false}],"status":"live","first_seen_at":"2026-11-10T12:35:20Z","employer_posted_date":"2026-11-10","last_verified_at":"2026-11-10T14:12:27Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"What You'll Do\nAs a Principal Software Engineer - Storage, you will help set the technical direction for Radiant's cloud storage offering and lead the design and delivery of the storage services and data capabilities required to run demanding cloud and AI workloads at scale.\nYou'll work across object, block, and file storage, data lifecycle, performance, resilience, APIs, and platform integrations. You'll partner closely with product, infrastructure, SRE, networking, and security teams, and with customers running the most demanding storage workloads.\nThis is a hands-on technical leadership role focused on building storage services that are high-performance, reliable, scalable, and easy to consume, through architecture, code, and the standards other teams build on.\nKey Responsibilities\nSet the technical vision and architecture for Radiant's storage services, and lead their design and implementation.\n\nDesign and build storage systems across object, block, and file, including the control plane, the data plane, and integration with existing Radiant services.\n\nTranslate product and customer requirements into robust architectures, APIs, and technical designs, working closely with the Storage Product Manager.\n\nOwn the performance, durability, availability, and consistency characteristics of the storage platform, and define the service levels it can credibly meet.\n\nProfile, benchmark, and tune throughput, latency, and IOPS for AI training, inference, and other data-intensive workloads.\n\nLead integration of storage with compute, Kubernetes (CSI), networking, IAM, observability, and developer tooling.\n\nDesign for failure through replication, snapshots, data protection, failure recovery, and safe upgrades at scale.\n\nDrive operational excellence with SRE, including capacity planning, observability, incident response, and post-incident improvements.\n\nRaise the engineering bar across the organisation through mentoring, design and code review, and technical standards.\n\nYour Profile\nExtensive experience building and operating large-scale distributed storage systems or storage-heavy cloud infrastructure.\n\nA track record of technical leadership at staff or principal level, including setting direction across multiple teams and delivering complex, high-stakes systems.\n\nStrong hands-on engineering skills in one or more systems languages such as Go or similar.\n\nDeep technical expertise across:\n\nStorage: object, block, and file storage, snapshots, replication, erasure coding, caching, tiering, data lifecycle\n\nProtocols & interfaces: S3, NFS, SMB, CSI, NVMe/NVMe-oF, RDMA, POSIX semantics, storage APIs\n\nInfrastructure: Kubernetes, containers, high-performance networking, GPU clusters, cloud platforms\n\nReliability: durability, availability, consistency models, consensus, failure recovery, data integrity\n\nObservability & security: metrics, logging, tracing, IAM, encryption at rest and in transit, auditability\n\nHands-on experience with technologies such as WEKA, VAST, DDN, Lustre, Ceph, MinIO, Pure Storage, or similar.\n\nUnderstanding of AI and HPC storage patterns, such as large-scale training data pipelines, checkpointing, and high-throughput parallel file systems.\n\nAble to reason about trade-offs between performance, durability, availability, cost, and operational complexity.\n\nExcellent written and verbal communication, including clear design documents and explaining complex trade-offs to technical and non-technical audiences.\n\nComfortable working directly with customers on highly technical problems.\n\nWhat You Bring\nStorage domain expertise: Understand how storage architecture affects application and workload performance, down to the hardware.\n\nEngineering excellence: Write and review code that sets the standard for correctness, performance, and maintainability.\n\nArchitectural judgement: Make sound long-term decisions on systems where data loss is not an option.\n\nTechnical leadership: Influence direction across teams without relying on authority, and grow the engineers around you.\n\nSystems thinking: Understand how storage interacts with compute, networking, and the rest of the cloud platform.\n\nOwnership: Drive storage capabilities from design through production, operation, and continuous improvement.\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 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\nOur process: Talent screen → Hiring Manager → Technical interview (two Principal Engineers) → Whiteboard Session → Final.\nCompany 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, we're building this organisation from the ground up. We're looking for people who'd rather build the playbook than inherit one - who are comfortable doing the work themselves as well as directing others, and who can adapt as fast as our strategy does. This is a startup model: attitude and adaptability matter more to us than years of experience or the size of the team you've previously managed.","description_format":"text","description_chars":6722,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Annual leave","Health insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["MLOps","AI Compute & Inference"],"lifecycle":[{"event":"open","at":"2026-11-10T14:12:27Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":49,"reasons":["conf:1","win:early"],"computed_at":"2026-11-10T16:04:58Z"},"pay":null,"html_url":"https://alion.io/job/radiant-principal-software-engineer-storage","json_url":"https://alion.io/job/radiant-principal-software-engineer-storage.json","meta":{"generated_at":"2026-11-10T16:04:58Z","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":3003,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-11T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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-principal-software-engineer-storage"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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-principal-software-engineer-storage"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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-principal-software-engineer-storage"},{"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-principal-software-engineer-storage\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fradiant-principal-software-engineer-storage"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4018890}},{"tool":"search_jobs","arguments":{"company":"radiant.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4018890},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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