Hayden Adams: From a Siemens Layoff to Uniswap

1. A layoff and an unfamiliar field

On July 6, 2017, Hayden Adams was laid off from his first job after college, working as a mechanical engineer at Siemens. In his later account, he described himself as down and directionless and told his friend Karl Floersch, who was then working on Casper FFG at the Ethereum Foundation.^[4]

“Congratulations, this is the best thing that could have happened to you,” Floersch told him in the conversation as Adams later reconstructed it. Floersch argued that Ethereum was early and that Adams should learn to write smart contracts.^[4]

— Karl Floersch, as reconstructed by Hayden Adams

Adams accepted the suggestion and spent the next two months learning the basics of Ethereum, Solidity, and JavaScript. When he wanted a real project on which to practice, Floersch suggested implementing the automated market maker described in posts by Vitalik Buterin.^[4]

2. An obscure Reddit post and the magic of x × y = k

Floersch sent Adams a 2016 Reddit post in which Vitalik Buterin proposed an onchain exchange model. Adams later compared his early pool demo with EtherDelta and described the order-book interface as clunky.^[4][2]

Buterin proposed a radically simpler mechanism called an Automated Market Maker (AMM). Instead of matching individual buyers and sellers on an order book, traders could swap tokens directly against an automated liquidity pool governed by a deterministic mathematical invariant: x × y = k.^[4][2]

“It was the most intriguing thing I had worked on in my life. It didn't even feel like work,” Adams wrote about building the first proof of concept.^[4]

— Hayden Adams

The formula was not Adams's invention: in his retrospective he credited Alan Lu of Gnosis with first conceiving an x × y = k market maker on Ethereum, Martin Köppelmann with relaying the idea to Buterin, and Buterin with publishing it. Adams's contribution was turning that line of thought into the specific Uniswap implementation.^[4]

3. Learning to code from scratch on dwindling savings

There was a basic obstacle: Hayden Adams had to learn software development. His official retrospective says that he spent two months learning Ethereum, Solidity, and JavaScript before beginning a real project. From October through November 2017, he built a first contract and his first website.^[4]

The first proof of concept was deliberately narrow: one ETH/ERC-20 pair and one liquidity provider. Its importance was practical. Compared with EtherDelta's order-book interface, Adams found that swapping against the demo felt simpler, and he began treating Uniswap as an example of a censorship-resistant, decentralized, permissionless application rather than merely a tutorial exercise.^[4]

By March 2018, Adams and collaborators had a fuller demo with multiple pools and liquidity providers. His account names Uciel Vilchis's frontend refactor, Pascal Van Hecke's product advice, and Floersch's technical help, making Uniswap's origin a collaborative build rather than a solitary montage.^[4]

4. Seoul, Vyper, and the grant request

In April 2018, after ten months without a job and with the crypto he was living on down more than 75%, Adams bought a last-minute flight to Seoul timed with Deconomy 2018. He could not enter the conference without a ticket, but Floersch introduced him to Vitalik Buterin, who read the open-source contract on his phone.^[4]

“Have you considered writing it in Vyper? Also, you should apply for an Ethereum foundation grant,” Buterin said in the exchange as Adams later reconstructed it.^[4]

— Vitalik Buterin, as reconstructed by Hayden Adams

Back in New York, Adams rewrote the contracts in Vyper and applied for $50,000 plus Runtime Verification's quoted cost. The Ethereum Foundation's Wave III announcement later listed Uniswap for $100,000. Runtime Verification formalized the x × y = k model, reviewed the code, and performed partial formal verification. Buterin, not the designers, supplied the name Uniswap when he heard the earlier working name 'Unipeg'.^[4][3]

5. A small launch that became public infrastructure

On November 2, 2018, the final day of Devcon 4 in Prague, Hayden Adams deployed Uniswap V1 to Ethereum mainnet. One provider deposited about $30,000 across three tokens, enough for swaps of roughly $100. Adams then spent about an hour rewriting the launch tweets before announcing the protocol to around 200 followers.^[4]

The protocol's later scale came through successive releases and a growing community. Uniswap V2 followed in May 2020. In September 2020, the project introduced UNI; its official allocation made 400 UNI claimable by each address that had called the V1 or V2 contracts before the snapshot, including addresses whose transactions had failed.^[5]

By October 2022, Uniswap Labs reported that the protocol had supported $1.2 trillion in trading volume. That figure describes cumulative protocol activity, not money earned by Adams or a victory over every centralized exchange.^[6]

The better lesson is narrower and more durable. A layoff created time to learn; public research supplied an idea; collaborators, a foundation grant, formal review, interface work, and launch liquidity turned a personal experiment into shared exchange infrastructure.^[4][3]