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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Software Engineer - Storage - **Company:** Radiant - **Location:** United Kingdom - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Training Data, Application Programming Interfaces (APIs), Artificial Intelligence, Amazon S3, Audit Trail, Cloud Computing, Cloud Storage, Computer Clusters, Code Review, Data Integrity, Data Loss, Software Design Documents, Programming Tools, File Systems, Distributed Data Store, Identity and Access Management, Information Lifecycle Management, Network Control, Posix, Remote Direct Memory Access, Weka, AI Infrastructure, Ceph (Software), Data Logging, Cloud Platform System, Caching, Build Management, Pure Storage, Kubernetes, Low Latency, Enterprise Integration, Data Management, Nvme - **Published:** November 11, 2026 - **Apply:** https://startup.jobs/principal-software-engineer-storage-radiant-10735850 ## About the Role * Extensive experience building and operating large-scale distributed storage systems or storage-heavy cloud infrastructure. * A track record of technical leadership at staff or principal level, including setting direction across multiple teams and delivering complex, high-stakes systems. * Strong hands-on engineering skills in one or more systems languages such as Go or similar. * Deep technical expertise across: * Storage: object, block, and file storage, snapshots, replication, erasure coding, caching, tiering, data lifecycle * Protocols & interfaces: S3, NFS, SMB, CSI, NVMe/NVMe-oF, RDMA, POSIX semantics, storage APIs * Infrastructure: Kubernetes, containers, high-performance networking, GPU clusters, cloud platforms * Reliability: durability, availability, consistency models, consensus, failure recovery, data integrity * Observability & security: metrics, logging, tracing, IAM, encryption at rest and in transit, auditability * Hands-on experience with technologies such as WEKA, VAST, DDN, Lustre, Ceph, MinIO, Pure Storage, or similar. * Understanding of AI and HPC storage patterns, such as large-scale training data pipelines, checkpointing, and high-throughput parallel file systems. * Able to reason about trade-offs between performance, durability, availability, cost, and operational complexity. * Excellent written and verbal communication, including clear design documents and explaining complex trade-offs to technical and non-technical audiences. * Comfortable working directly with customers on highly technical problems. ## Description As 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. You'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., * Set the technical vision and architecture for Radiant's storage services, and lead their design and implementation. * Design and build storage systems across object, block, and file, including the control plane, the data plane, and integration with existing Radiant services. * Translate product and customer requirements into robust architectures, APIs, and technical designs, working closely with the Storage Product Manager. * Own the performance, durability, availability, and consistency characteristics of the storage platform, and define the service levels it can credibly meet. * Profile, benchmark, and tune throughput, latency, and IOPS for AI training, inference, and other data-intensive workloads. * Lead integration of storage with compute, Kubernetes (CSI), networking, IAM, observability, and developer tooling. * Design for failure through replication, snapshots, data protection, failure recovery, and safe upgrades at scale. * Drive operational excellence with SRE, including capacity planning, observability, incident response, and post-incident improvements. * Raise the engineering bar across the organisation through mentoring, design and code review, and technical standards., * Engineering excellence: Write and review code that sets the standard for correctness, performance, and maintainability. * Architectural judgement: Make sound long-term decisions on systems where data loss is not an option. * Technical leadership: Influence direction across teams without relying on authority, and grow the engineers around you. * Systems thinking: Understand how storage interacts with compute, networking, and the rest of the cloud platform. * Ownership: Drive storage capabilities from design through production, operation, and continuous improvement., * Open 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. * Learning Time: we all have dedicated learning time to focus on new skills, projects or interests that lay outside of your day-to-day job. * Health & Wellbeing: we want everyone to feel healthy and happy, so we offer private medical insurance via Bupa. * Cycle to Work Scheme: we're committed to building a sustainable business, so we encourage cycling to work. * Gympass subscription to a variety of gyms and wellbeing apps * Participation in the company shares program * Enhanced parental pay & leave Our process: Talent screen * Hiring Manager * Technical interview (two Principal Engineers) * Whiteboard Session * Final.