# Casey Charlesworth

> Casey Charlesworth is a full-stack engineer in Los Angeles who recently built the SwishX marketplace and the Solana side of Glacis Airlift. Pronouns: they/them. Email is best: hello@caseycharlesworth.com

I’m Casey Charlesworth, a full-stack engineer in Los Angeles. I’ve been building web products since 2019, mostly in TypeScript and React with Node and Postgres behind them, and Rust when the work is on Solana.

My first job was at West Monroe, a consulting firm, where I went from software engineer to senior software engineer. There I worked on Con Edison’s intranet, Coinbase’s NFT beta and the front end of Polaris’s RIDE COMMAND Garage, and handled DevOps for more than 30 repositories. On the side, another developer and I built DispenseFirst, a point-of-sale system for cannabis dispensaries. From 2022 I also built raffles, staking sites and holder portals for Solana NFT communities, and the Position Simulator for Orca.

In 2023 I left West Monroe. I spent about six months as founding engineer at Indie-Pop, building Coll3ctibles, then about two years at Gavel on billing, plan gating and the document engine. Since 2025 I’ve been a consultant at Lazer Technologies, working for SwishX, Glacis Labs, Sorare and House of Pranksy. I also maintain Cinder Wallet, an open-source Solana wallet extension.

How Casey works:
- Where money moves, I put the rules in the database. (The SwishX ledger is append-only because a Postgres trigger refuses edits)
- I check model output before anything depends on it. (SwishX slab-label OCR goes through a schema check, one retry, then a person)
- I write the docs while I build. (Glacis Airlift shipped with its Docusaurus site)

## Pages
- [Home](https://caseycharlesworth.com/): selected work, the Lab demos, services and Casey's answers to common questions; the same content reads as plain text at https://caseycharlesworth.com/?mode=read
- [Work](https://caseycharlesworth.com/work): all 15 case studies, filterable by domain, chain, channel and year
- [About](https://caseycharlesworth.com/about): bio, how Casey works, career timeline, experience and education
- [Résumé](https://caseycharlesworth.com/resume): HTML résumé; PDF at https://caseycharlesworth.com/casey-charlesworth-resume.pdf; JSON Resume at https://caseycharlesworth.com/resume.json
- [Contact](https://caseycharlesworth.com/contact): hello@caseycharlesworth.com

## Flagship case studies
- [SwishX](https://caseycharlesworth.com/work/swishx): A marketplace for sealed packs of graded sports cards, built through Lazer Technologies in 2026. (Sole architect and builder; via Lazer Technologies; 2026)
- [Glacis Airlift](https://caseycharlesworth.com/work/glacis-airlift): Through Lazer I built the Solana side of Glacis Labs' Airlift bridge, with one TypeScript SDK over Wormhole NTT and LayerZero OFT, fee quotes read from the chain, and the docs. (Owned the Solana integration layer; via Lazer Technologies; 2025)
- [Orca Position Simulator](https://caseycharlesworth.com/work/orca-position-simulator): The Position Simulator in Orca's pools UI shows a liquidity provider their PnL across a price range before they deposit. I built it as a freelancer. (Built the Position Simulator in Orca's pools UI; Freelance; 2022–2023, approximate)
- [Gavel](https://caseycharlesworth.com/work/gavel): Gavel is a no-code platform for legal document automation. I built billing and plan gating, owned the Python generator every workflow runs through, and built the AI review screen. (Full-stack software engineer; Gavel; 2023–2025, approximate)
- [Solana community tooling](https://caseycharlesworth.com/work/solana-community-tooling): In 2022 and 2023 I led a small team building raffles, a spin-the-wheel game and staking sites for Solana NFT communities, re-skinned per collection. Owners ran their own events in Prismic. (Built the white-label raffle, spin-the-wheel and staking products; Freelance; 2022–2023)

## More case studies
- [Catalina Whale Mixer](https://caseycharlesworth.com/work/catalina-whale-mixer): A holder portal for the Catalina Whale Mixer community, with points and a leaderboard, Floating staking, a rewards store and multi-wallet profiles. (Built the holder portal and Floating staking, with a small team; Freelance; 2022–2023, approximate)
- [Coll3ctibles](https://caseycharlesworth.com/work/coll3ctibles): As Founding Engineer at Indie-Pop I built Coll3ctibles, multi-chain collectibles for people who've never seen a seed phrase. One session covers six sign-in methods and three chains. (Founding Engineer, primary developer on the 2023 codebase; Indie-Pop; 2023, approximate)
- [House of Pranksy](https://caseycharlesworth.com/work/house-of-pranksy): Via Lazer I built the House of Pranksy launch site and its SeaDrop contracts for soulbound memberships and gift minting. It launched on OpenSea (SeaDrop), and OpenSea featured it. (Built the launch site and the SeaDrop contracts; via Lazer Technologies; 2025, approximate)
- [Sorare security review](https://caseycharlesworth.com/work/sorare-security-review): Via Lazer I led the internal pre-audit security review of four Anchor programs for Sorare's move to Solana, and built the devnet tooling. (Led the internal pre-audit security review and built the devnet tooling; via Lazer Technologies; 2025)
- [Coinbase NFT beta](https://caseycharlesworth.com/work/coinbase-nft-beta): Consulting through West Monroe, I contributed to Coinbase's NFT marketplace beta, including the purchase flow and the contract and royalty management UI. (Contributor, purchase flow and contract/royalty management UI; via West Monroe; 2022)
- [Con Edison intranet](https://caseycharlesworth.com/work/con-edison-intranet): Frontend lead on the Microsoft 365 phase of Con Edison's intranet program, named one of Nielsen Norman Group's 10 Best Intranets of 2020. (Frontend lead on the Microsoft 365 phase; via West Monroe; 2019–2020, approximate)
- [Wildtide](https://caseycharlesworth.com/work/wildtide): Bookable expeditions for Wildtide Crew on Shopify, without a bookings SaaS. Trip dates are variants, so Shopify's own inventory enforces capacity, and trips are paid as a deposit, then the balance. (Solo designer, builder and operator; Independent; 2026, approximate)
- [Cinder Wallet](https://caseycharlesworth.com/work/cinder-wallet): An open-source, self-custodial Solana wallet extension, small enough to read end to end. The popup never holds a keypair. Not audited. (Author and maintainer; Independent; 2025–now)

## Storyboards (enterprise work without screenshots)
- [Polaris RIDE COMMAND Garage](https://caseycharlesworth.com/work/polaris-ride-command-garage): Through West Monroe I built the front end of Polaris's RIDE COMMAND Garage, where riders add vehicles by VIN, log maintenance and check recalls. (Built the front end of the Garage; via West Monroe)
- [DispenseFirst](https://caseycharlesworth.com/work/dispensefirst): Another developer and I built out DispenseFirst, a point-of-sale system for cannabis dispensaries, in Vue.js and Node.js, with APIs for transactions, inventory sync and compliance. (Software Developer (contract, part-time); DispenseFirst; 2021–2022)

## Lab (playable demos)
- [Concentrated-liquidity range demo](https://caseycharlesworth.com/lab/orca-range): My re-creation of the concentrated-liquidity math behind a position simulator. Pick a range, a deposit and an ending price, and the PnL curve redraws.
- [Solana transaction size demo](https://caseycharlesworth.com/lab/1232-bytes): Address lookup tables shrink a Solana transaction. Glacis Airlift used them in 2025 to get its larger bridge transfers under the v0 size limit.
- [Last-card demo](https://caseycharlesworth.com/lab/last-card): Two buyers try to buy the last card at the same moment. Without a lock, the checkout charges them both.
- [Cinder Wallet signing walkthrough](https://caseycharlesworth.com/lab/cinder-wallet): Follow a signing request through Cinder Wallet, from the web page to the keyring, with the code for each step. MIT licensed, not audited.

## Experience
- Senior Software Engineer, Consultant, Lazer Technologies (2025–now): Clients: SwishX, Glacis Labs, Sorare, House of Pranksy
- Freelance Shopify developer, Independent (2026, approximate): Wildtide
- Author and maintainer, Cinder Wallet, Open source (2025–now): Cinder Wallet, a self-custodial Solana wallet extension (MIT licensed)
- Software Engineer, Gavel (later acquired by Relativity, 2026) (2023–2025): Billing and entitlements, the document engine, AI variable review
- Founding Engineer, Indie-Pop (2023, approximate): Coll3ctibles
- Freelance Solana developer, Independent (2022–2023): White-label raffles, wheels and staking, the Catalina Whale Mixer holder portal and Floating staking, and the Orca Position Simulator
- Software Developer (contract), DispenseFirst (2021–2022): Part-time
- Software Engineer, then Senior Software Engineer, West Monroe (2019–2023): Con Edison, Coinbase NFT beta, Polaris, DevOps for 30+ repos

## Writing (Medium articles)
- [Bringing Solana Development to New Heights: A Comprehensive SAAS Solution for NFT Communities](https://medium.com/p/ed13ed45744b) (2023-06-05)
- [Utilities on Solana for NFT Collections: Enhancing Value and Security](https://medium.com/p/62702cd4368c) (2023-06-05)
- [Empowering Communities with Custom Raffles: A White-Label Solution for Token and NFT Gated Events](https://medium.com/p/146d82da75ea) (2023-06-02)
- [White-Label Staking: Innovations in Solana Staking Contracts and the Emergence of pNFTs](https://medium.com/p/fe182254bc0e) (2023-06-02)
- [Solana Wallet Adapter React](https://medium.com/p/5bb604e8b908) (2023-04-28)
- [How To Create a Twitter Bot](https://medium.com/p/5ebe2391f152) (2023-04-26)
- [How To Buy SOL Tokens on Solana](https://medium.com/p/aa818d4c4b79) (2023-04-26)
- [How To Buy An NFT](https://medium.com/p/70601a924fc7) (2023-04-26)
- [Create a Solana NFT Mint Page in React](https://medium.com/p/bc17f8938a7e) (2023-04-26)
- [Get NFTs in Solana Wallet](https://medium.com/p/c906b59815a4) (2023-04-26)
- [Mint From Metaplex Candy Machine](https://medium.com/p/e079bd89f73c) (2023-04-26)
- [Create NFT Candy Machine Solana](https://medium.com/p/58801484d73a) (2023-04-26)
- [Update Solana NFT Metadata](https://medium.com/p/b1ed08b9c2f2) (2023-04-26)
- [Solana NFT Collection Hashlist](https://medium.com/p/41c4425479c3) (2023-04-26)
- [How to Create a Discord Bot](https://medium.com/p/402caf0c8d54) (2023-04-26)

## Contact
- Email: hello@caseycharlesworth.com
- GitHub: https://github.com/freyja-934
- LinkedIn: https://www.linkedin.com/in/casey-charlesworth

## Optional
- [Sitemap](https://caseycharlesworth.com/sitemap.xml)
- [JSON Resume](https://caseycharlesworth.com/resume.json)
- [How this site is built](https://caseycharlesworth.com/colophon)