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I'm Charlie Pank, a Principal Engineer and founder with 25+ years across payments, blockchain, and full-stack product development. I led Skyscanner's Direct Booking and Payments teams, built a production MVP from a broken demo in 4 months, and am currently CTO and solo founder for a Web3 agricultural commodities platform (Sumer Exchange) progressing from a demo to production. I also independently built _Website not available. Sign in: https://www.twine.net/signup_ a non-custodial stable-coin escrow checkout on Base, and I contribute as an open-source builder with a focus on robust architecture and scalable delivery. I love solving hard technical problems, mentoring engineers, and shaping systems from the ground up.…I'm Charlie Pank, a Principal Engineer and founder with 25+ years across payments, blockchain, and full-stack product development. I led Skyscanner's Direct Booking and Payments teams, built a production MVP from a broken demo in 4 months, and am currently CTO and solo founder for a Web3 agricultural commodities platform (Sumer Exchange) progressing from a demo to production. I also independently built _Website not available. Sign in: https://www.twine.net/signup_ a non-custodial stable-coin escrow checkout on Base, and I contribute as an open-source builder with a focus on robust architecture and scalable delivery. I love solving hard technical problems, mentoring engineers, and shaping systems from the ground up.

Charlie Pank

Full Stack Developer, Back-End Developer, Front-End Developer, +4

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I'm Charlie Pank, a Principal Engineer and founder with 25+ years across payments, blockchain, and full-stack product development. I led Skyscanner's Direct Booking and Payments teams, built a production MVP from a broken demo in 4 months, and am currently CTO and solo founder for a Web3 agricultural commodities platform (Sumer Exchange) progressing from a demo to production. I also independently built _Website not available. Sign in: https://www.twine.net/signup_ a non-custodial stable-coin escrow checkout on Base, and I contribute as an open-source builder with a focus on robust architecture and scalable delivery. I love solving hard technical problems, mentoring engineers, and shaping systems from the ground up.…I'm Charlie Pank, a Principal Engineer and founder with 25+ years across payments, blockchain, and full-stack product development. I led Skyscanner's Direct Booking and Payments teams, built a production MVP from a broken demo in 4 months, and am currently CTO and solo founder for a Web3 agricultural commodities platform (Sumer Exchange) progressing from a demo to production. I also independently built _Website not available. Sign in: https://www.twine.net/signup_ a non-custodial stable-coin escrow checkout on Base, and I contribute as an open-source builder with a focus on robust architecture and scalable delivery. I love solving hard technical problems, mentoring engineers, and shaping systems from the ground up.

Available to hire

I’m Charlie Pank, a Principal Engineer and founder with 25+ years across payments, blockchain, and full-stack product development. I led Skyscanner’s Direct Booking and Payments teams, built a production MVP from a broken demo in 4 months, and am currently CTO and solo founder for a Web3 agricultural commodities platform (Sumer Exchange) progressing from a demo to production. I also independently built Website not available. Sign in: https://www.twine.net/signup a non-custodial stable-coin escrow checkout on Base, and I contribute as an open-source builder with a focus on robust architecture and scalable delivery. I love solving hard technical problems, mentoring engineers, and shaping systems from the ground up.

Skills

Experience Level

Expert

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Language

English

Fluent

Work Experience

CTO & Solo Engineer at Summer Exchange

November 1, 2024 - March 1, 2026

Sole technical hire; inherited a broken demo and rebuilt the entire product from scratch, delivering a production MVP in 4 months. Built a B2B platform for wholesalers to trade agricultural commodities using EVM smart contracts and stable-coin settlements across Ethereum mainnet, Base, and Avalanche. Designed and deployed production-grade auth, on-chain signing, and a trustless hold-and-release escrow flow; implemented wallet integrations, network/currency selection, and a first-principles security model. Established infrastructure on GCP with Docker containers, and created a GitHub Actions CI/CD pipeline; led architectural decisions and mentoring of engineers.

Founder & Solo Engineer at Stable Drop

January 1, 2024 - Present

Non-custodial stable-coin escrow platform on Base (ETH L2); delivers buyer protection and a familiar checkout experience—wallet, network, and currency selection automated; zero gas fees, 1% flat fee, and a trustless funds flow via public smart contracts. Architected a wallet- and payment-flow that aggregates multiple rails, providing a smooth UX for buyers and sellers. Designed an on-chain escrow model with auditable public contracts and a streamlined upgrade path, drawing on prior payments and crypto experience.

Founder at Home of Pilates

January 1, 2023 - November 1, 2024

Built and launched an online Pilates studio end-to-end: iOS app, Android app, and a marketing website. Cross-compiled Kotlin/Compose for mobile platforms and used WordPress for the web presence. Implemented universal deep-link routing across mobile platforms to unify onboarding flows and content access.

Principal Engineer - Direct Booking & Payments at Skyscanner

January 1, 2010 - January 1, 2019

Led the Direct Booking & Payments domains; managed a team of 20 engineers; contributed to company-wide architectural decisions and served on the Council of Senior Principal Engineers. Delivered hands-on product completion (0→1) by merging delivery and leadership, and authored an engineering training program for 1,400 staff from CEO to new hires.

Database Engineer at Aridhia

January 1, 2009 - January 1, 2010

Developed health care data management software; contributed to clinical and genomic data projects.

Database Engineer at Cognia

January 1, 2004 - January 1, 2007

Worked on drug identity, genomics, and protein folding research data systems.

Associate DevOps Engineer at JPMorgan Chase

January 1, 1998 - January 1, 2004

Supported London's trading and risk management platforms; bug-fixing, requirements gathering, and real-time trader support on the trading floor.

CTO & Solo Engineer at Sumere Exchange

November 1, 2024 - March 31, 2026

Sole technical hire; inherited a broken demo (dev-only, no real auth, plain-text identity) and built the entire product from scratch, delivering a production MVP in 4 months. Built a B2B platform for wholesalers to trade agricultural commodities using EVM smart contracts and stable-coin settlement across Ethereum mainnet, Base, and Avalanche. Designed and configured end-to-end production services, including Web3 wallets, auth, and deployment pipelines; established a trustless, auditable architecture with on-chain funds custody.

Founder at Stable Drop

January 1, 2024 - Present

Non-custodial stable-coin escrow platform on Base (Ethereum L2); publicly verifiable smart contracts; buyer protection and familiar checkout experience—wallet, network, and currency selection automated; zero gas fees; 1% flat fee. Architected as a trustless system with funds held in public smart contracts (analogous to Uniswap’s model).

Principal Engineer — Direct Booking & Payments at Skyscanner

January 1, 2010 - December 31, 2019

Joined as a database engineer; progressed to Senior Principal Engineer over 9 years. Led the Direct Booking and Payments departments, managing a team of 20 engineers. Sat on Skyscanner’s council of Senior Principal Engineers; helped define standards for core languages and architectural direction. Delivered hands-on production code alongside leadership and mentoring; developed a company-wide leadership training program for 1,400 staff.