Latest in Crypto Hiring: Jefferies Execs Leave to Create Startup

Unstoppable Domains taps former Twitch, IBM pros to onboard more Web3 users in Europe and Asia

article-image

Blockworks exclusive art by axel Rangel

share

key takeaways

  • Former legal counsel at Deutsche Bank joins Amber Group
  • Ethereum scaling platform Polygon names a new chief information security officer

Anthony Mazzarese and Brandon Mulvihill have left financial services company Jefferies to co-found a startup aiming to serve institutional clients in the crypto space. 

Mazzarese was Jefferies’ global head of FX prime brokerage distribution, while Mulvihill served as its global head of FX prime brokerage. The two will now focus on bridging the gap between traditional financial services and digital assets through industrial-grade technology, trade flow expertise and attractive commercial terms, Mazzarese told Blockworks.

The former Jefferies executives are building a team and securing funding, he added. Additional details about the startup are set to come in the next few weeks.

Digital asset platform Amber Group appointed Ehsan Haque as its general counsel for Europe, Middle East and Africa (EMEA).

Haque joins Amber Group from his latest role as global head of legal and compliance for private equity firm Hamilton Capital Holdings. He has also recently worked as general counsel for investment technology platform AlphaSwap and Lending Block, an online digital asset lending and borrowing platform. 

Earlier in his career, Haque was legal counsel for Deutsche Bank. He later joined Royal Bank of Scotland and was head of equities for Nomura’s EMEA legal department.

The hire follows Amber Group’s latest $200 million raise last month led by Singaporean state holding company Temasek, giving the company a valuation of roughly $3 billion.

Web3 digital identity platform Unstoppable Domains hired Sajjad Rehman as its head of Europe and Nilkanth Iyer as its head of Asia.

Launched in 2018, Unstoppable Domains allows anyone to purchase a domain name that is minted as an NFT on the blockchain. It has more than 2 million registered NFT domains.

Rehman joins from Amazon-owned video livestreaming service Twitch, where he was vice president of business development for the EMEA region. Iyer previously held roles at software intelligence company CAST and tech goliath IBM.

The two executives will seek to help Unstoppable Domains onboard millions of new users to Web3 by partnering with wallets, exchanges and other industry players in Europe and Asia.

Mudit Gupta recently announced on Twitter that he would be joining Polygon as its chief information security officer.

Gupta also serves as an advisor at SushiSwap and a technical partner at Delta Blockchain Fund, according to his LinkedIn profile. He had worked for nearly three years as a senior solidity developer and then lead blockchain engineer for software development company Polymath.

“Polygon is the leading Ethereum scaling platform, and I’m stoked about our upcoming ZK rollups,” Gupta said in a Monday tweet. “Security has been a priority at Polygon, and I will be pushing it to the next level.”

Decentralized financial market infrastructure company Bosonic hired Paddy Boyle as its global head of clearing and derivatives. Founded in 2016, the firm offers infrastructure aiming to eliminate counterparty credit and settlement risk in digital asset markets. 

Boyle was previously a partner at Goldman Sachs, where he spent 16 years as the investment bank’s global head of foreign exchange options. More recently, he was a managing director and global head of ForexClear at London-based clearing house LCH.

Former Treasurer of the United States Rosie Rios joined the board of directors of Unicorn Hunters, a platform that connects companies looking for expansion capital to achieve a billion-dollar valuation.

Rios’ experience will be key to Unicorn Hunters achieving its strategic objectives, which include making Unicoin the top equity-backed cryptocurrency in the world, the company announced Wednesday.

Unicoin, which launched last month, pays dividends and is backed by equity in emerging high-growth companies. 

The RLY Network Association hired Jeremiah Owyang as its chief marketing officer.

The non-profit supports the infrastructure and development of the RLY Network, which powers projects including Rally.io, Unite.io and SuperLayer.io.

Owyang is an advisor and angel investor in several early-stage startups, including blockchain gaming giant Animoca Brands. He also founded Catalyst Companies, a council for corporations that are seeking to innovate with new technologies.


Get the news in your inbox. Explore Blockworks newsletters:

  • Blockworks Daily: The newsletter that helps thousands of investors understand crypto and the markets, by Byron Gilliam.
  • Empire: Start your morning with the top news and analysis to inform your day in crypto.
  • Forward Guidance: Reporting and analysis on the growing intersection of crypto and macroeconomics, policy and finance.
  • 0xResearch: Alpha directly in your inbox. Market highlights, data, degen trade ideas, governance updates, token performance and more.
  • Lightspeed: Built for Solana investors, developers and community members. The latest from one of crypto’s hottest networks.
  • The Drop: For crypto collectors and traders, covering apps, games, memes and more.
  • Supply Shock: Tracking Bitcoin’s rise from internet plaything worth less than a penny to global phenomenon disrupting money as we know it.
Tags

Upcoming Events

Industry City | Brooklyn, NY

TUES - THURS, JUNE 24 - 26, 2025

Permissionless IV serves as the definitive gathering for crypto’s technical founders, developers, and builders to come together and create the future.If you’re ready to shape the future of crypto, Permissionless IV is where it happens.

Old Billingsgate

Mon - Wed, October 13 - 15, 2025

Blockworks’ Digital Asset Summit (DAS) will feature conversations between the builders, allocators, and legislators who will shape the trajectory of the digital asset ecosystem in the US and abroad.

recent research

Research Report Templates.jpg

Research

Bluefin possibly stands at an inflection point. The token is near an all-time low yet the protocol’s spot volume market share and derivatives exchange usage have been increasing month over month since its November launch. Given its current market position and the upcoming upgrades (for both Bluefin and SUI), there may be upside potential before the increased supply growth in December. However, strong opposition from existing competitors (like Cetus and Suilend), as well as new entrants (like Aftermath), pose key challenges to Bluefin’s medium-term success.

article-image

With a friendlier regulatory outlook and the airdrop flow being stemmed, some are looking to how new native tokens can become valuable assets

article-image

The recent action paints an uncertain picture for future monetary policy moves

article-image

Is the finance world becoming “more liquid”? Experts give their takes as TradFi players consider new moves

article-image

Ethereum core developers debated a major overhaul of the EVM, weighing complexity and benefits

article-image

Top Committee Democrat Sen. Elizabeth Warren in her opening statement accused Atkins of “helping billionaire CEOs like Sam Bankman-Fried”