Hi, I'm Tobi

Technical Product Owner by day, OSS software engineer by night. I like cloud computing, such as AWS and Cloudflare, DuckDB, SQL, modern data stacks, GIS tools and some sprinkles of web development.

I'm leveraging AI tools like Claude Code, Cursor and Copilot 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

What if you could take a SQL query written for PostgreSQL and transpile it to BigQuery, Snowflake, or any of 33 database dialects — entirely in the browser, with no server round...

February 14, 2026

5 min read

sql rust wasm

Custom DuckDB Wasm builds for Cloudflare Workers

What if you could run full SQL queries, including JOINs, aggregations, and even remote Parquet file reads, directly inside a Cloudflare Worker? No database server, no connection...

January 27, 2026

5 min read

async wasm duckdb

Using Iceberg Catalogs in the Browser with DuckDB-Wasm

With recent updates of DuckDB itself, DuckDB Wasm and the Iceberg extension it is now possible to query Iceberg catalog directly from the browser, with no backends. involved. Ex...

December 16, 2025

4 min read

wasm duckdb iceberg

TypeScript scripts as DuckDB Table Functions

What if you could query any REST API, GraphQL endpoint, or web page directly from DuckDB using SQL? No ETL pipelines, no intermediate files, no complex setup just write a TypeSc...

December 10, 2025

3 min read

typescript arrow duckdb

Use your favorite AI tool to read the lastest AWS News

You can use the unofficial AWS News MCP Server, which combines the news articles, blog posts and updates of more than 40 different AWS Newsfeeds to a single source. Connecting t...

October 14, 2025

3 min read

ai aws agent

Using Amazon SageMaker Lakehouse with DuckDB

Preconditions To use the Amazon SageMaker Lakehouse with DuckDB, you first have to create a S3 Table bucket, a namespace and an actual S3 Table. All those steps are described in...

June 8, 2025

5 min read

glue sagemaker duckdb