Ed Felten
Founder at Offchain Labs, Inc.
New Jersey, United States
Summary
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RockstarEd Felten is a founder and engineer with 14 years of hands-on experience building decentralized systems and production-grade back-end software from New Jersey. As Co-founder and Chief Scientist at Offchain Labs and Professor Emeritus of Computer Science and Public Affairs at Princeton, he bridges cutting-edge research with practical product delivery. He has deep low-level systems expertise—demonstrated by implementing and extending the Arbitrum Virtual Machine in Go, adding opcodes and core stack behaviors to support ethhash2 and on-chain challenge functionality. Ed combines academic rigor with startup velocity, translating complex cryptoeconomic and VM design into reliable, testable implementations. He is particularly skilled at plumbing-level protocol work that most engineers never touch, enabling private, fast, decentralized applications. His track record reflects an uncommon mix of research leadership, pedagogical clarity, and production engineering.
14 years of coding experience
Github Skills (11)
algorithm10
data-structures10
algorithms10
arb10
go10
opcodes10
data-structure10
opcode10
blockchain9
testing9
ethereum9
Programming languages (6)
Github contributions (5)
OffchainLabs/arbitrum-classic
May 2019 - Jul 2022
Powers fast, private, decentralized applications
Role in this project:
Back-end Developer
Back-end DeveloperContributions:168 reviews, 732 commits, 249 PRs in 3 years 2 months
Contributions summary:Ed primarily contributed to implementing and testing the functionality of an AVM (Arbitrum Virtual Machine) in Go. Their work involved adding new opcodes and implementing their behavior, along with defining supporting structures and interfaces, demonstrating a deep understanding of the low-level workings of the AVM. The user's contributions also extended to the core of the AVM, with changes to instruction names, stack operations, and other low-level components. Overall, the user's work focused on building and improving the AVM's core functionality with an emphasis on supporting new features such as an ethhash2 and supporting challenge functionality.
ipfsethereump2ppowersblockchain
OffchainLabs/arb-os
Mar 2020 - Jul 2022
ArbOS operating system, to run at Layer 2 on Arbitrum chains. Also a compiler for Mini, the language in which ArbOS is written.
Contributions:359 reviews, 2931 commits, 471 PRs in 2 years 4 months
operating-systemchainscompilerlayer-2operating
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