Jacob Kaufmann
CTO at Cassandra Laboratories Foundation
Boulder, Colorado, United States
Summary
👤
Senior🎓
Top SchoolJacob Kaufmann is a CTO and senior engineer with eight years of experience building high-throughput, cloud-native systems and distributed network software. He graduated summa cum laude in Computer Science from Clemson and brings strong hands-on expertise in Java, Go, and Python across AWS backends and React frontends. At Amazon he contributed to tier‑1 systems processing 10,000+ TPS and delivered Lambda optimizations that produced six‑figure annual savings, and at the Ethereum Foundation he’s focused on core networking and overlay routing for an Ethereum portal client. Now leading technical strategy at Cassandra Laboratories Foundation, he combines systems-level engineering with product-minded execution. An active open-source contributor, he’s implemented critical overlay node state and content storage features for the well-known ethereum/trin project, reflecting deep familiarity with p2p protocols like discv5. Based in Boulder, he balances technical leadership with outdoor pursuits, bringing persistence and curiosity to both engineering and exploration.
9 years of coding experience
3 years of employment as a software developer
Bachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Clemson University
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (5)
rust10
ethereum10
kademlia10
networking9
distributed-systems9
Programming languages (9)
Github contributions (5)
ethereum/trin
Jul 2021 - Jan 2023
An Ethereum portal client: a json-rpc server with nearly instant sync, and low CPU & storage usage
Role in this project:
Back-end Developer
Back-end DeveloperContributions:326 reviews, 54 commits, 106 PRs in 1 year 6 months
Contributions summary:Jacob primarily contributed to the development of an Ethereum portal client, focusing on core network functionality. Their work included creating a workspace to support multiple networks, refactoring the codebase, and adding new overlay node state. They implemented overlay network features by managing the node state for overlay routing tables and incorporating the use of discv5. The user also added key components for storing and retrieving content within the network.
ethereumjson-rpc
jacobkaufmann/lighthouse
Nov 2023 - May 2025
Ethereum consensus client in Rust
Contributions:34 pushes, 7 branches in 1 year 5 months
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