Principal Software Engineer

About the role : We are looking for a Principal Software Engineer with deep expertise in Kubernetes, CSI driver development, and systems programming in Golang and/or C++. In this hands-on role, you will lead the design and implementation of scalable, production-grade integrations that enable our NAS appliance to run natively within Kubernetes environments. You'll develop a custom CSI driver, work closely with NFS / SMB protocols, and optimize storage operations within containerized workloads. Strong knowledge of Linux systems, Kubernetes internals, and cloud-native storage concepts is essential, along with a passion for building reliable infrastructure software used in enterprise-scale deployments. Responsibilities: • Lead the architecture, design, and Kubernetes-native deployment of our next-generation NAS appliance, enabling cloud-native workloads to access and manage data efficiently and securely. • Design and implement a robust CSI (Container Storage Interface) driver to expose the appliance's NAS capabilities (e.g. NFS, SMB) to Kubernetes environments, supporting persistent volumes, dynamic provisioning, snapshots, and related storage lifecycle operations. • Collaborate closely with product, platform, and architecture teams to define the technical strategy for container storage integration, ensuring that the system supports multi-tenancy, scalability, and high availability. • Work extensively with storage protocols such as NFSv3/v4, SMB, and CIFS, integrating them into the Kubernetes ecosystem in a performant and secure manner. • Deeply interact with the Linux subsystem, including the VFS layer, mount namespaces, filesystems, and kernel-level tuning to ensure performance and stability of storage mounts within containers. • Develop Kubernetes-compliant packaging and lifecycle automation using Helm, Operators, and Custom Resource Definitions (CRDs) to facilitate deployment and upgrades of the NAS appliance in production clusters. • Troubleshoot complex issues across distributed systems, networking, and persistent storage layers - including root cause analysis across the stack: containers, orchestration, filesystem, and kernel. • Act as a subject matter expert (SME) for Kubernetes storage integrations and provide technical leadership in sprint planning, code reviews, and architectural decision-making. • Mentor junior engineers, foster knowledge sharing, and help build a high-performance, high-collaboration engineering culture. Required Skills : • 9+ years of hands-on experience in professional software engineering, with a strong background in building high-performance, scalable, and production-grade systems - preferably in storage or infrastructure-focused domains. • Advanced programming proficiency in Golang and/or C++, with the ability to design and implement robust, maintainable system components. Should be comfortable working across both user space and kernel-adjacent code paths. • Proven experience building or contributing to a Container Storage Interface (CSI) driver or Kubernetes-native storage solution. Deep understanding of CSI specifications, driver lifecycle, and integration with Kubernetes control plane. • In-depth knowledge of Kubernetes internals, including the architecture of: o Custom Resource Definitions (CRDs) o Controllers and Operators o StatefulSets, DaemonSets, and volume lifecycle management o Scheduling implications of storage and node affinity • Strong grasp of Kubernetes storage concepts • Experience with NAS and traditional file-based storage systems, particularly with protocols like: o NFS (v3/v4) - mount options, lock handling, network tuning o SMB/CIFS - integration, authentication, performance tuning o Object storage (S3, MinIO, Ceph, etc.) is a plus • Deep Linux systems experience • Hands-on experience with container runtimes, such as Docker, containerd, and CRI-O, with familiarity in troubleshooting and optimizing performance in containerized environments. • Experience working with CI/CD pipelines, version control systems (Git), and infrastructure automation tools (e.g., GitHub Actions, Jenkins, ArgoCD, or similar). Why Work at Nasuni - Hyderabad? As part of our commitment to your well-being and growth, Nasuni offers competitive benefits designed to support every stage of your life and career: - Competitive compensation programs - Flexible time off and leave policies - Comprehensive health and wellness coverage - Hybrid and flexible work arrangements - Employee referral and recognition programs - Professional development and learning support - Inclusive, collaborative team culture - Modern office spaces with team events and perks - Retirement and statutory benefits as per Indian regulations To all recruitment agencies: Nasuni does not accept agency resumes. Please do not forward resumes to our job boards, Nasuni employees or any other company location. Nasuni is not responsible for any fees related to unsolicited resumes. Nasuni is proud to be an equal opportunity employer. We are committed to fostering a diverse, inclusive, and respectful workplace where every team member can thrive. All qualified applicants will receive consideration for employment without regard to race, religion, caste, color, sex, gender identity or expression, sexual orientation, disability, age, national origin, or any other status protected by applicable laws in India or the country of employment. We celebrate individuality and are committed to building a workplace that reflects the diversity of the communities we serve. If you require accommodation during the recruitment process, please let us know This privacy notice relates to information collected (whether online or offline) by Nasuni Corporation and our corporate affiliates (collectively, "Nasuni") from or about you in your capacity as a Nasuni employee, independent contractor/service provider or as an applicant for an employment or contractor relationship with Nasuni.