Hi, I'm Tobi

Technical Product Owner by day, OSS software engineer by night. I like building products in the cloud on AWS or Cloudflare, DuckDB, SQL, modern data stacks, GIS tools and some sprinkles of web development.

I'm leveraging AI tools like Codex, Claude Code and custom agent harnesses to build useful things with a product mindset, fast.

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Recent Blog Posts

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Introducing polyglot - A Rust/Wasm SQL transpilation library

polyglot transpiles SQL between 33 dialects like PostgreSQL, BigQuery and Snowflake. A Rust port of sqlglot, compiled to Wasm to run in the browser and Node.js.

February 14, 2026

5 min read

sqlrustwasm

Custom DuckDB Wasm builds for Cloudflare Workers

Run DuckDB SQL queries, including remote Parquet, S3 and R2 reads, directly inside Cloudflare Workers with Ducklings, a minimal async DuckDB Wasm build.

January 27, 2026

5 min read

asyncwasmduckdb

Using Iceberg Catalogs in the Browser with DuckDB-Wasm

Query Apache Iceberg catalogs like S3 Tables and Cloudflare R2 Data Catalog from the browser with DuckDB-Wasm and the Iceberg extension, no backend needed.

December 16, 2025

4 min read

wasmduckdbiceberg

TypeScript scripts as DuckDB Table Functions

Query REST APIs, GraphQL endpoints and web pages with SQL by using Bun TypeScript scripts as DuckDB table functions via the shellfs and arrow extensions.

December 10, 2025

3 min read

typescriptarrowduckdb