Jeff Kao

Staff Engineer at Radar

Engineering

How we replaced Elasticsearch and MongoDB with Rust and RocksDB

by

Jeff Kao

on

August 7, 2025

Radar offers geocoding, place search, and fraud detection APIs, powered by HorizonDB, a Rust-based engine delivering 20k QPS and sub-millisecond latency.

Read more
Engineering

How Radar uses TypeScript to manage Terraform via CDKTF

by

Jeff Kao

on

September 13, 2022

Learn how Radar uses TypeScript to manage Terraform via CDKTF.

Read more
Engineering

Build Order-Ahead Apps with Segment & Radar

by

Jeff Kao

on

August 3, 2021

In this recipe, we’ll show you how you can build an order-ahead experience on iOS using Radar, Segment, and Twilio.

Read more
Engineering

Custom Partitions with Kinesis and Athena

by

Jeff Kao

on

June 14, 2021

How Radar implemented custom-partitioning for AWS Kinesis using Athena

Read more
Engineering

Open-sourcing our Node.js S2 library

by

Jeff Kao

on

September 16, 2019

We’re open-sourcing our Node.js TypeScript bindings for Google’s S2 library to bring the power of S2 to the Node.js developer ecosystem.

Read more