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Principal Rust Engineer At

Progress, you'll lead the technical direction of the search engine behind our Agentic RAG product: a distributed Rust platform for vector, full-text and knowledge-graph search, developed in the open as part of the NucliaDB project. You'll work from low-level index data structures up to the distributed architecture, together with ML, product and platform teams, and directly affect the quality, speed and cost of our product. Own the architecture and roadmap of our distributed search and indexing engine, written in Rust.

Evolve how indexes are built, merged, sharded and replicated on object storage, PostgreSQL and NATS. Lead large migrations and performance work, based on profiling and benchmarks, without customer downtime. Contribute to the Python services, SDKs and PyO3 bindings built on the engine, keeping public APIs stable.

Keep the system observable, reliable and secure across Kubernetes deployments and CI/CD.



Write design proposals, review code, mentor senior engineers and represent the project in the open-source community. Extensive experience building and running high-performance production systems, including technical leadership.

Expert Rust: async (Tokio), concurrency, memory-mapped I/O, profiling and low-level optimization (e.g.

Experience designing distributed data systems: storage engines, sharding, replication and consistency trade-offs. Solid experience with PostgreSQL, object storage (S3, GCS, Azure) and messaging (NATS JetStream or Kafka).

Strong

Python, ideally with PyO3, asyncio, FastAPI and Pydantic.

Experience running services on Kubernetes with observability and CI/CD (ideally GitHub Actions). Clear written and verbal communication in English, including design documents. Willing to mentor others, comfortable in a remote-first, global team.

Experience with Tantivy, Lucene, vector databases or other search engines.

Experience maintaining open-source projects, including dependency auditing and licensing. If this sounds like you and fits your experience and career goals, we'd be happy to chat.

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