Nummus Developer Completes MVP Milestone for Bitcoin Wallet

Over the past two months, an individual developer has been intensively working on building a Bitcoin wallet from scratch as the minimum viable product (MVP) for their startup, Nummus. This journey has been marked by significant progress and the completion of the first major development milestone. The developer aimed to share their experiences, accomplishments, and future plans before the launch.

Nummus is envisioned as a custodial wallet that will offer a BTC-backed credit card, collateralized loans, and secure custody. Users will be able to hold their Bitcoin while using its value on a card, solving the paradox of "never sell your Bitcoin" and "Bitcoin is the future of money." The wallet will be Bitcoin and stablecoin only, with native Bitcoin infrastructure, avoiding reliance on third parties. The MVP is non-custodial and focuses on base layer Bitcoin functionality, with potential Lightning integration later.

The developer, with nearly seven years of experience as a frontend developer and recent backend certification, decided to take on both the CEO and CTO roles. They immersed themselves in learning mobile development with React Native and deepened their understanding of Bitcoin's technical aspects through various online courses and textbooks. This intensive study period significantly enhanced their problem-solving skills and technical capabilities.

The tech stack for the wallet includes React Native with TypeScript for the frontend, Go for the backend, Expo for the framework, Jest for testing, GlueStack UI for the user interface, Resend for the mail API, BDK-wasm for Bitcoin functionality, and Supabase for the database. The project management is kept simple with Obsidian and markdown using the PARA system.

So far, the developer has made substantial progress, with functional but unstyled screens that pass all tests. The code is organized, modular, and clean, with some refactoring and linting needed before launch. The wireframes were sketched on an e-ink tablet and refined in Figma. The screens built so far include onboarding, home screen, credit card screen, Bitcoin screen, and transaction history screen.

The roadmap for the project includes implementing real Bitcoin functionality, writing tests, refining the frontend, and conducting a security audit before launch. The objective is to have a functional product ready by the Bitcoin Conference Las Vegas in May. The development is progressing on schedule to meet this deadline.

Building Nummus has been both challenging and rewarding, transforming an exploratory question into a tangible product. The decision to build in public has enhanced accountability and transparency, with feedback already improving the product quality. The developer is enthusiastic about the project's direction and invites observers to follow the development process live through social media channels and Discord.