ljahier

I’m a Senior Software & Data Engineer focused on data-intensive systems, analytical backends and high-performance software.

I help engineering teams design, evaluate and build systems where architecture, performance and reliability matter.

I stay hands-on from architecture to implementation, working mainly with Rust, Go and TypeScript.

My work typically includes:

- ClickHouse architecture, schema design and performance optimization
- Analytical and OLAP backend design
- Real-time ingestion and data pipelines
- Software and data architecture
- Backend and service design
- Query engines and database selection
- Observability, reliability and production hardening

My approach is workload-driven: understand the constraints, establish the right metrics, identify bottlenecks and their root causes, compare the options, and measure the impact of the changes.

I’m particularly interested in ClickHouse and other data-intensive systems where performance, scale and architecture are first-class concerns.