Senior Storage & Data Engineer

Senior Storage & Data Engineer 80%-100%, Lugano, fixed-term Project background

Storing petabytes is the easy part. The hard part is everything between the moment data lands on disk and the moment a researcher - or a training job - can actually trust it, find it, and use it.

Our parallel file systems and object stores already move data fast. What they don't do on their own is tell a scientist where a dataset came from, which transformations produced it, whether it's the version that backed last quarter's published result, or how to feed it to a Data Loader without saturating the I/O subsystem. That gap - between raw bytes and usable, traceable, reproducible data - is where this role lives.

You'll work at both ends: the storage layer (throughput, integrity, tiering at multi-petabyte scale) and the data layer above it (lineage, provenance, discoverability, access patterns). If you've ever been annoyed that "the data is on the cluster" gets treated as the end of the job rather than the start of it, read on.

We are committed to building a diverse and inclusive engineering team and particularly encourage applications from groups underrepresented in tech.

We particularly encourage women to apply.

• Bridge ingestion and use. Design the pipelines and metadata that turn ingested data into something findable and consumable - catalogs, schemas, and access layers that match how training jobs and simulations actually read, not just where bytes sit.
• Make data traceable. Build lineage and provenance so any dataset, checkpoint, or result can be traced back to its inputs and transformations. Reproducibility is a first-class requirement here, not a retrofit.
• Tune for the workload. Optimise parallel file systems (Lustre, GPFS) and object storage for the concurrency, small-file, and large-checkpoint patterns of distributed GPU training and HPC simulation.
• Operate at scale, safely. Design and run multi-petabyte storage with the integrity and availability scientific work depends on - erasure coding, redundancy, hot-to-archival tiering.
• Automate everything. Deploy and scale storage and data services as code. Snowflake infrastructure doesn't survive at this scale.
• Make it observable. Instrument storage health, capacity trends, and pipeline performance so problems surface before users feel them.
• Translate. Turn real access patterns from domain scientists and ML engineers into technical requirements - and push back when a request would quietly break something downstream.

For a project in the weather and climate domain, aimed at understanding and mitigating the impact of climate change, an opening for two years is available.

The initial two-year contract could potentially be extended or even become permanent.

• A technical degree (CS, engineering)
  or equivalent experience that demonstrates the same depth.
• Solid storage grounding: file systems (block and object), performance tuning, redundancy (RAID, erasure coding).
• Python, and comfort automating infrastructure (Ansible, Terraform, or similar).
• A working understanding of how ML and scientific workloads consume data - billions of small files, large checkpoints, sharding - and why naive layouts fall over.
• A point of view on data lineage, provenance, or reproducibility - and ideally tooling you've used to enforce it.

What helps you stand out

• Hands-on parallel file systems (Lustre, Spectrum Scale/GPFS) or distributed storage (Ceph, VAST).
• Scientific data formats - HDF5, Zarr, Parquet - and opinions on when each earns its place.
• Object storage (S3) interfaced with ML frameworks (PyTorch, Tensor Flow).
• Orchestration (Kubernetes, Argo) and data-movement tooling.
• Data versioning / cataloguing (e.g. DVC, lakeFS, a metadata catalog) and familiarity with FAIR data principles.
• CI/CD and provisioning:
  Git Lab CI, Hashi Corp Vault, MAAS.

We don't expect every box ticked. Depth in storage or data engineering, plus the curiosity to grow into the other, matters more than a complete checklist.

What you get

• Hardware and scale you won't find in enterprise IT - and problems with no vendor playbook.
• Work that directly enables published science and frontier-scale model training.
• Room to shape how data is managed, not just maintained, in an environment that takes it seriously.

Our core values as guiding principles

• Curiosity:
  You enjoy learning and understanding systems deeply.
• Openness:
  You collaborate effectively and value different perspectives.
• Courage:
  You are willing to tackle difficult or unfamiliar problems.
• Supportive:
  You help colleagues and users succeed.
• Integrity:
  You act responsibly, reliably, and transparently.