William Cleaver

Updated Oct 26, 2026 (Available for work)

I was born in the UK and have lived and worked in the US, Canada, the UAE and now Costa Rica.

I currently operate a creative studio, rainyseason.cr. We help companies build what’s next, from software to creative work, and develop our own ventures onchain and online.

Previously I led marketing and PR at San Francisco core developer Metallicus, before that I worked at Yas Marina Circuit and the Formula 1® Abu Dhabi Grand Prix, Time Out magazine, wagamama and Jack Wills.

I enjoy building software and blockchain based applications, and endurance racing.

Find me on 𝕏, send me an email, or an encrypted message here.

William Cleaver
Founder & Builder · Marketing & Creative Director
Building with AI, blockchain, smart contracts

Marketing and commercial leader with 15 years across fintech and blockchain infrastructure, Formula 1®, media and international consumer brands in the US, GCC and Europe. Directed marketing and PR at Metallicus, taking stablecoin, digital identity and payments infrastructure to US banks and credit unions. Since February 2026, co-founder of rainyseason.cr, shipping production software, AI agents and Ethereum smart contracts. Pairs senior marketing and commercial leadership with hands-on technical depth.

Experience

rainyseason.crFeb 2026 – Present
Co-FounderGuanacaste, Costa Rica
  • Lead product, engineering and go-to-market for a studio building sovereign software and creative work for clients and in-house ventures, including scent.tech (fragrance hardware) and Greater Records (record label).
  • Ship full-stack products end to end (JavaScript, Node.js, Python, SQLite) through AI-assisted development, automated testing and self-hosted deployment.
  • Operate the studio's own platform: a private client console, end-to-end encrypted messaging and images (AES-256-GCM, keys agreed by ECDH P-256), encrypted WebRTC voice calls, Web Push notifications and passkey (WebAuthn) authentication, with a native macOS client in Swift.
  • Develop and deploy Ethereum smart contracts (Solidity, ERC-721, Foundry testing) and custom AI agents (LLM APIs, Model Context Protocol tooling) in production.
MetallicusNov 2021 – Feb 2026
Director of Marketing & Public RelationsSan Francisco, CA
  • Directed marketing and PR across 11 products on an institutional blockchain stack: Metal Blockchain (L0), XPR Network (L1), Metal L2 (Ethereum L2), Metal Dollar (stablecoin), Metal Pay (on-ramp), Metal X (DEX) and WebAuth (self-custody wallet).
  • Led growth marketing through a 6.8× rise in XPR Network total value locked (TVL), from $11.5m to a $78.2m peak.
  • Led the launch of the Bonifii acquisition (formerly CULedger), forming Metal CUSO and connecting 70+ credit unions to Metal Blockchain.
  • Led go-to-market for the Metal Blockchain Banking Innovation Program and stablecoin pilot: 15+ credit unions live with stablecoins in testing and the first credit union stablecoin, $CLDUSD.
  • Owned positioning, messaging and go-to-market for stablecoin, digital identity, tokenization and payments infrastructure sold to US banks and credit unions, leading growth, design, social and product marketing.
  • Partnered with bank and credit union CEOs and CROs on partnership announcements, including Payfinia and DaLand CUSO, shaping the executive narrative, sales enablement and launch communications.
  • Led media relations and executive thought leadership, including engagement with members of US Congress; secured media partnerships and executive features in Fortune, Nasdaq, CoinDesk and American Banker.
  • Owned event strategy and execution at Money20/20, Consensus, Permissionless and American Banker, from booth design to thought leadership and speaker submissions.
Yas Marina Circuit · Formula 1® Abu Dhabi Grand PrixNov 2020 – Dec 2021
Marketing ManagerAbu Dhabi, UAE
  • Delivered race promotion and campaign creative for the 2021 Formula 1® Abu Dhabi Grand Prix, the championship decider, driving ticket and corporate hospitality sales for a full-capacity race weekend.
  • Managed VIP and artist relations over Grand Prix weekend, including headline acts at the after-race concerts.
  • Contributed to production of the documentary on the 2021 track reconfiguration, the circuit's first layout change since opening in 2009, covering the redesigned hairpin, marina and hotel sections.
  • Managed premium track days and the sales and marketing of retail circuit experiences.
  • Marketed the circuit's year-round motorsport and fitness calendar, from drag racing to triathlons, to grow its audience beyond race weekend.
ITP Media Group · Time OutOct 2018 – Nov 2020
Head of CommercialDubai, UAE
  • Generated $500K in first-year revenue through integrated partnerships across Time Out's digital, print and live-event platforms.
  • Owned the commercial lifecycle end to end: creative concept, client pitch, commercial negotiation and delivery.
wagamamaNov 2014 – Oct 2018
Head of International MarketingLondon, UK
  • Managed franchise marketing across Europe and MENA, including launch marketing for the brand's first restaurants in Italy (Milan) and Spain (Madrid, with Grupo Vips) and pre-opening development in France.
  • Advised franchise partners on market-entry strategy, brand creative, menus and restaurant operations.
  • Owned local marketing, PR, events and partnerships across the full London restaurant portfolio.
Jack WillsJun 2011 – Nov 2014
USA Marketing ManagerUnited States
  • Created and ran a pop-up retail format at New England rowing regattas, generating over $200K in revenue.
  • Managed retail marketing, store openings, PR and social for 14 US stores, including Nantucket and Martha's Vineyard.
  • Ran the US university ambassador programme and experiential field marketing, operating a fleet of seven Land Rover Defenders.

Skills

Marketing & commercial: Brand positioning, go-to-market strategy, growth marketing, PR, thought leadership, partnerships and sales enablement.

Creative & delivery: Creative direction, integrated campaigns, event strategy, retail marketing and international market launches.

Software development: JavaScript, Node.js, HTML/CSS, Python automation, SQL/SQLite and Swift/macOS.

AI & automation: AI-assisted coding, LLM API integration, custom agents and Model Context Protocol (MCP) tooling.

Blockchain: Solidity, Ethereum, ERC-721 smart contracts, wallet integration and Foundry contract testing.

Engineering & delivery: REST APIs, Git/GitHub, automated testing, passkey integration and self-hosted deployment.

Achievements

Building

Studio & ventures

Co-founderrainyseason.cr
rainyseason.crCo-founderGuanacaste, Costa Rica
Projectscent.tech
scent.techProjectDetails to come
Projectmap.diamonds
map.diamondsProjectDetails to come
Open to collaborateWant to build
with me?
Get in touch
Get in touchMessageIdeas, products, partnerships

Endurance

I like to participate in physical and mental challenges. The hardest (not listed below) was the David Goggins 4x4x48, where I ran 4 miles every 4 hours for 48 hours.

Ironman Mont-TremblantMont-Tremblant, Canada2022
13:40:523.8 km Swim1:10:44180 km Bike6:52:2542.2 km Run5:20:47
Ironman VichyVichy, France2021
14:35:533.8 km Swim1:12:18180 km Bike7:56:0742.2 km Run5:14:05
Ironman 70.3 DubaiDubai, UAE2020
5:51:541.9 km Swim0:41:1490 km Bike2:48:4321.1 km Run2:10:42
Berlin MarathonBerlin, Germany2017
5:39:42*42.2 km Run5:39:42*A friend got injured at 30 km, and I helped him finish the final 12 km.
Barcelona MarathonBarcelona, Spain2015
3:3142.2 km Run3:31

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Favourite Places

Music

Records & listening