Senior Software Engineer — File System

Senior Software Engineer — File SystemEngineering | File System Team | Full-Time | US Boston/Marlborough – Hybrid 3 daysRole OverviewNasuni is looking for a Senior Software Engineer to join our File System team and help build the next generation of Nasuni’s storage platform, including core work on Strider and CUFS, Nasuni’s distributed file system.This role is for an engineer who enjoys working deep in the stack: high-performance C/C++, file system semantics, distributed storage, protocol behavior, snapshots, caching, recovery, and Kubernetes-based infrastructure. You will design and deliver production-grade components that directly affect reliability, performance, availability, and customer trust.This role is not a fit for someone focused primarily on application-layer feature development or someone who has only used distributed systems without designing, debugging, or operating them in production.Level & Scope DefinitionYou will independently own complex subsystems within the File System team, make technical decisions within your areas of ownership, and lead design discussions for storage and data path components. You will collaborate closely with Platform, Control Plane, CI/CD, QA, and SRE-oriented teams to ensure software is reliable, observable, upgradeable, and supportable in customer environments.You are expected to balance hands-on execution with technical leadership: writing production code, reviewing designs, mentoring engineers, improving operational quality, and using AI-assisted engineering tools responsibly to accelerate development, debugging, testing, and analysis while validating outputs through strong engineering judgment.ResponsibilitiesDesign, implement, test, and operate major components of Nasuni’s distributed file system and data path infrastructure.Write high-performance C/C++ for kernel-adjacent and user-space storage systems.Improve file system behavior across snapshots, caching, faulting, eviction, metadata handling, and recovery paths.Build and harden NFS, SMB, and S3 access layers with attention to protocol correctness, performance, and operational edge cases.Develop highly available storage services using Kubernetes-based patterns for failover, replication, scheduling, stateful workloads, and recovery.Contribute to distributed system design involving consistency models, metadata coordination, failure handling, and multi-volume behavior.Partner with adjacent engineering teams to deliver software that is observable, upgradeable, testable, and production-ready.Lead code reviews, design reviews, incident follow-up, and technical alignment within your areas of ownership.Use AI tools for code assistance, test generation, log analysis, debugging, documentation, or workflow automation while validating correctness, security, and performance before adoption.Mentor engineers and raise the quality bar for systems design, code quality, testing, and operational readiness.QualificationsMust-Have7+ years of professional software engineering experience, including significant systems programming experience.Strong C or C++ expertise, including memory management, concurrency, debugging, profiling, and performance-sensitive code.Hands-on experience designing, building, or operating distributed systems in production.Practical understanding of consistency, availability, failure modes, replication, recovery, or distributed metadata.Experience with file systems, storage engines, databases, operating systems, kernel-adjacent software, or similar infrastructure.Familiarity with at least one protocol or storage interface such as NFS, SMB, S3, POSIX, FUSE, or object storage APIs.Ability to own complex technical work from design through production delivery.Strong written communication skills for design docs, reviews, remote collaboration, and operational handoffs.PreferredExperience with cloud-native storage, object storage backends, or hybrid cloud infrastructure.Experience operating stateful services on Kubernetes, including scheduling, resource management, operators, failover, or upgrade patterns.Background with HA design, leader election, distributed locking, replication state machines, or recovery workflows.Familiarity with Linux kernel internals, VFS, inode structures, POSIX semantics, FUSE, or eBPF.Experience with storage benchmarking, workload characterization, structured logging, metrics, tracing, or production debugging.Experience using AI-assisted engineering tools for code generation, unit tests, debugging, documentation, log analysis, or workflow automation with appropriate validation.IdealPrior ownership of production file system, storage, database, distributed metadata, or protocol-layer components at scale.Deep experience with NFSv4, SMBv3, multi-protocol file access, or enterprise storage systems.Demonstrated ability to improve reliability, performance, or operability for customer-facing infrastructure.Experience mentoring engineers in systems design, concurrency, debugging, testing strategy, and operational excellence.Strong AI fluency in engineering workflows, including structured prompting, validation through tests and benchmarks, and sound judgment about when not to use AI-generated output.Experience GuidelinesSuccessful candidates typically bring 7–12+ years of total software engineering experience, with 4+ years in systems, storage, distributed infrastructure, databases, operating systems, or performance-sensitive backend engineering. Equivalent experience from storage, cloud infrastructure, databases, networking, distributed systems, or kernel-adjacent engineering will be considered.About Nasuni Nasuni is the leading hybrid cloud storage solution that powers business growth with effortless scalability, built-in security, and fast edge performance using a unique cloud-native architecture. The Nasuni File Data Platform delivers operational excellence by consolidating NAS and backup, eliminating data silos, and making management easy and flexible without changes to apps or workflows. Its built-in security offers proactive defense and rapid recovery, lowering organization’s risk from the detrimental effects of ransomware attacks and other disasters. Synchronized access to file data everywhere ensures user productivity by supporting remote and hybrid work. Why work at Nasuni? As part of our commitment to your well-being, we are pleased to offer comprehensive benefits packages to employees across the US. Benefits packages generally include: Best in class employee onboarding and training "Take What You Need” paid time off policy Comprehensive health, dental and vision plans Company-paid life and disability insurance 401(k) and Roth IRA retirement plan Generous employee referral bonuses Flexible remote work policy 10 Paid Holidays Wide array of wellbeing offerings Pre-tax savings accounts with company contributions Great team culture and social activities Collaborative workspaces Free on-site fitness centers and stocked kitchens in select office locations Professional development resources Compensation Transparency:In accordance with U.S. pay transparency laws, Nasuni is committed to providing visibility into compensation for all U.S.-based roles. Click HERE to view our compensation ranges by job grade. Actual compensation will be based on a variety of factors, including a candidate’s experience, skills, education, and work location.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 an equal opportunity employer. The equal employment opportunity policy at Nasuni protects employees and job applicants from discrimination on the bases of race, religion, color, sex (including pregnancy, gender identity, and sexual orientation), parental status, national origin, age, disability, family medical history or genetic information, political affiliation, military service, or other non-merit based factors. 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