Hey,
I'm James Tsetsekas
Full stack developer with 14+ years building web apps, payment systems, and Bitcoin infrastructure. Currently at Satmo architecting Lightning Network payment plugins for e-commerce. Founded the Jersey City Bitcoin Meetup and Socratic Seminar.
About Me
I'm a full stack developer with 14+ years of experience. Currently at Satmo building Bitcoin Lightning Network payment plugins for WooCommerce, Wix, and Shopify - self-custodial, non-custodial key management, the full merchant integration stack. Before that I built e-commerce platforms, food ordering systems, and internal tools at companies ranging from Fortune 500 (Novartis, Realogy) to startups.
I founded the Jersey City Bitcoin Meetup where I run monthly Socratic seminars on protocol development and Lightning infrastructure. I run my own Lightning nodes, contribute to open-source Bitcoin projects, and I'm always building something - whether that's an AI desktop assistant, a Lightning-powered gaming platform, or a financial analytics tool. Outside of code: skiing, self-hosting everything, and reading The Pragmatic Programmer for the third time.
What I Do
Bitcoin & Lightning Infrastructure
I build payment systems on Bitcoin's Lightning Network. At Satmo I've shipped self-custodial payment gateway plugins for WooCommerce, Wix, and Shopify. I run Lightning nodes, work with LND/LNBits/Phoenixd, and build APIs for instant, low-fee Bitcoin transactions.
Full Stack Product Development
Web apps, mobile apps, SaaS platforms - I build the whole thing. React, Next.js, Node.js, TypeScript, Python, PostgreSQL, Redis. Recent projects include a cross-platform AI desktop assistant, a provably fair Lightning gaming platform with 13 games, and financial analytics tools.
Community & Open Source
I founded the Jersey City Bitcoin Meetup, a monthly Socratic Seminar covering protocol development and Lightning infrastructure. I mentor developers, contribute to open-source Bitcoin projects, and believe the best way to learn is to build and share.
Skills & Certifications
Scrimba Frontend Developer Bootcamp
80+ hours of teacher-led group sessions and solo projects covering HTML, CSS, JavaScript, React, responsive design, UI design, Git, peer code review, and mentoring.
FreeCodeCamp.org Front End Libraries Developer Certification
300 hours of coursework covering how to create powerful Single Page Applications (SPAs) with React and Redux, and style them with Bootstrap and Sass.
FreeCodeCamp.org JavaScript Algorithms and Data Structures Developer Certification
300 hours of coursework covering the fundamentals of JavaScript, including variables, arrays, objects, loops, and functions, as well as object-oriented programming (OOP) and functional programming (FP).
FreeCodeCamp.org Responsive Web Design Developer Certification
300 hours of coursework covering how to make web pages that respond to different screen sizes.
JavaScript Essentials 1
This 40-hour course covers how interactive web and mobile applications are created with JavaScript. Learn to program your own applications with no prior knowledge required. This course is aligned to the JSE – Certified Entry-Level JavaScript Programmer Certification, developed in collaboration with the JS Institute. Programming skills open you up to careers in almost any industry and are required for advanced web, mobile app, or game development roles.
Ethical Hacker
This 70 Hour course prepares you with an Ethical Hacker skillset and give you a solid understanding of offensive security. You will become proficient in the art of scoping, executing, and reporting on vulnerability assessments, while recommending mitigation strategies. Follow an engaging gamified narrative throughout the course and get lots of practice with hands-on labs inspired by real-world scenarios.
Projects
LNBits OpenClaw / AI Agent Skill
An LNBits extension with QR code support, published as an OpenClaw AI agent skill on ClawHub. Enables Lightning Network payment workflows with QR code generation, integrable with AI agents and automation. Built for the ClawHub ecosystem to extend LNBits functionality for agent-driven Bitcoin payments.
VibesIntel - AI Desktop Assistant
Built VibesIntel, an invisible desktop assistant that provides real-time AI insights during meetings, interviews, and presentations. Developed with Electron and React frontend, Node.js/Express backend API with PostgreSQL, and integrated Google Gemini AI for screenshot analysis, audio transcription, and contextual chat. Features translucent always-on-top window, global hotkeys, usage tracking, and subscription-based SaaS architecture with FREE, PRO, and PRO UNDETECTABLE tiers.
LNZap - Lightning Network Gaming Platform
Built a full-stack provably fair gaming platform with 13 games (dice, blackjack, poker, roulette, crash, mines, plinko, slots, and more). Lightning Network deposits/withdrawals via LNbits, real-time chat with /rain and /tip commands, and a complete admin panel. Next.js 15, React 19, PostgreSQL, Redis, WebSockets.
Satmo WordPress Payment Plugin
Developed a comprehensive WordPress WooCommerce payment gateway plugin that integrates Bitcoin Lightning Network payments via a custom ACINQ/phoenixd backend. Features include real-time exchange rates, automatic payment verification, QR code generation, webhook security tokens, and seamless WooCommerce Blocks support. The plugin enables merchants to accept instant Lightning payments with minimal setup, eliminating the need for node management.
Satmo Wix Payment Plugin
Built a Payment Provider Service Plugin (PPSP) for Wix e-commerce platforms, enabling Bitcoin Lightning Network payments through a custom ACINQ/phoenixd backend. The solution includes a Next.js external payment page hosted on Firebase, webhook integration for automatic order updates, and seamless deeplink support for mobile wallets. Merchants can easily configure and accept Lightning payments directly within their Wix stores.
Satmo Shopify Payment Extension
Created a Shopify payment extension that enables Bitcoin Lightning Network payments through a custom ACINQ/phoenixd backend. Features include a Next.js external checkout app, and real-time payment tracking, automatic order fulfillment via webhooks. The extension integrates with Shopify's manual payment methods and provides merchants with a secure, low-fee payment option.
Get in touch
Let's schedule a meeting. Feel free to reach out directly by email at [email protected].