Contact: [email protected]

Data engineering consulting

About Updab

Updab AB, founded by William Saar (MSc) and incorporated in Sweden, offers backend and data engineering consulting services to international clients on a remote basis.

William's experiences include data and backend engineering at scale from two consumer apps each serving 300M+ users, development of leading enterprise security and performance tools, and latency-sensitive financial trading tech.

Technologies include LangChain, LLMs, Apache Flink, Kafka Streams, Apache Beam, Google Dataflow, BigQuery, as well as older Hadoop-based frameworks, and programming languages Java, Rust, Scala, TypeScript, Python, Go, and SQL.

Courses and Certifications

2025 - Building RAG Agents with LLMs - from NVIDIA

2023 - Generative AI with Large Language Models - from Coursera

2014 - Machine Learning - from Coursera

Writings and Talks

Slides from talk about Migrating batch-ETLs to Streaming Flink
https://www.slideshare.net/WilliamSaar/migrating-batch-etls-to-streaming-flink

ITNEXT article: Serverless Twitter bot with Google Cloud
https://itnext.io/serverless-twitter-bot-with-google-cloud-35d370676f7

tCell/Rapid7 blog article: Trusting Agents with Rust
https://blog.rapid7.com/2017/06/01/trusting-agents-with-rust/

Projects

GitBulletin - AI project in Rust that demonstrates using OpenAI APIs to generate newspaper-style front pages from Git commits, and Postgres vector stores with embedding models to search related activity.
https://gitbulletin.com/repo/saarw/flushout

Open source project Flushout - a distributed data model based on event sourcing written in TypeScript
https://github.com/saarw/flushout