Freelancer profile translated to English.
Back to original languageAbout David
I work on the construction and optimization of high-performance Big Data systems, focusing on efficiency, automation, and maintainability.
I have experience optimizing Apache Spark applications in large-scale data environments, reducing operational costs and execution times through improvements in design, execution, and observability.
I am particularly interested in the use of Rust for data systems, as well as NixOS and reproducible approaches for infrastructure and environment management.
I am currently exploring Sail and DataFusion applied to DataOps, with an emphasis on reproducible, efficient, and easy-to-maintain workflows.
Spanish
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Lake SailContributor to the Lake Sail project (Rust)May 2025 - Today (1 year and 1 month)I actively participate as a committer in Lake Sail, a query execution engine written in Rust, designed for high-performance analytical data processing. I contribute to the development of key features, execution optimizations, and performance testing. This collaboration is part of the drive to build the Rust data ecosystem, combining my experience with Apache Spark with the use of modern and efficient technologies.Repository: https://github.com/lakehq/sail
- Apache DatafusionContributor to Apache Datafusion (Rust)August 2025 - Today (10 months)Committer of the Apache Datafusion project, used as an engine to accelerate, among other things, Apache Spark accelerators.Repository https://github.com/apache/datafusion
- NixOS (nixpkgs project)Maintainer of Sail in Nix/Nixpkgs/NixOSFebruary 2026 - Today (4 months)Maintainer of the Sail package in nixpkgs (NixOS ecosystem).Responsible for packaging, integration and release updates of Sail within nixpkgs, ensuring reproducible builds and compatibility across supported platforms.
- Implemented Rust-based packaging using buildRustPackage
- Added automated update support via nix-update-script
- Integrated basic package-level tests (passthru.tests)
- Verified cross-platform builds (Linux / Darwin)
- Coordinated packaging visibility with upstream project
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Education
- Degree in Statistical Sciences and TechniquesUniversity Miguel Hernandez of Elche2012Licenciatura de ciencias y técnicas estadísticas
- Development of Cross-Platform Applications, Computer ScienceI.E.S. de Alquerías2016Desarrollo de aplicaciones multiplataforma, Informática
Certifications
- Confluent Fundamentals Apache KafkaConfluent2021