Staff Software Engineer (Provenance

Position: Staff Software Engineer (Provenance)
TL;

DR:
We are looking for an engineer to help build a new generation of provenance and build information into the Cloudsmith platform. If you are motivated by solving problems of performance at a massive scale and passionate about your craft, you will find an environment in which you can thrive ut Cloudsmith Cloudsmith is transforming how organizations handle software artifacts and secure their supply chains.

As a cloud native, multi-tenant platform, we enable organizations to build software better, through best-in-class artifact management and software supply chain security. Our vision is to become the software supply chain itself, powering the future of software delivery.

We are the world's most potent artifact management platform, built by developers for developers. Our platform supports over 30 formats spanning languages, container formats, and operating systems, with enterprise-grade features, including vulnerability and security scanning, world-class policy management and enforcement, and web-scale to handle the Fortune 500. Organizations integrate Cloudsmith as critical infrastructure into their development, deployment, and distribution pipelines, trusting us to protect and accelerate, regardless of scale.

Backed by top-tier investors and on a trajectory toward IPO and beyond, we're building mission-critical infrastructure that powers software delivery for organizations worldwide. We operate at the cutting edge of cloud-native technology, tackling complex distributed systems challenges that directly impact millions of developers. Now is an exciting time to join us as we revolutionize how organizations deliver and secure software and help write the next chapter of our rocketship growth story.

The Role As a Staff Software Engineer on the Supply Chain Trust team, you will play a key role in building platform capability that gives enterprise customers complete, end-to-end traceability from source code to built artifact. Not just where an artifact came from, but how it was built, what went into it, and exactly how it was used across every pipeline and deployment downstream.

Cloudsmith already sits in the middle of how organisations store and distribute software artifacts. This role turns that position into something more powerful: a source of truth. You will build the infrastructure that captures, stores, and surfaces build provenance and pipeline usage data — so that when a customer asks which of their services consumed a given artifact, and what build produced it, the answer is in Cloudsmith, complete and trustworthy.

Our Team We are four teams responsible for building application capabilities and the underlying platform upon which Cloudsmith is founded. We operate in a highly collaborative environment, where people with different skills come together to make things happen. We each contribute to an environment where curiosity, support, transparency, and bias for action reign. We have a modern CI/CD approach, deploying multiple times per day, and we support a global set of customers who are engineers like us.

Key Responsibilities Build:
Design, implement, and ship the provenance ingestion service — capable of accepting provenance and attestation payloads from CI/CD systems, public registries, signed bundles, and customer-uploaded artifacts across a wide range of formats (SLSA, in-toto, SBOM attestations, Sigstore bundles etc).Store:
Own the storage architecture for signed provenance metadata.

Validate:
Build the validation engine that verifies cryptographic integrity and evaluates attestation data against configurable customer trust policies — SLSA level requirements, allowed builder identities, key material, and more.

Expose:
Deliver clean, well-documented APIs that make provenance data useful to customers and to other parts of the platform — queryable, auditable, and reliable.

Collaborate:
Work closely with product, customer success, and the wider engineering team to understand how enterprise security teams consume provenance data and translate that into features they love.

Quality:
Prioritise correctness, security, and observability — this is critical infrastructure customers trust with their…