SatsGoal
Challenge
SatsGoal needed a Bitcoin savings calculator that could handle precise calculations with satoshis, the smallest unit of Bitcoin. The math had to be exact since even tiny rounding errors could compound into significant amounts over time. They also needed to handle multiple currencies and Bitcoin price fluctuations in real-time.
Our Process
React with TypeScript for type-safe calculations. BigNumber.js for precise decimal arithmetic. Multiple cryptocurrency API integrations with fallback logic. Chart.js for visualizing accumulation over time. All calculations run client-side for user privacy.
Reviewed the product goals, user paths, and existing technical constraints.
Mapped the core workflows before changing the interface or architecture.
Built the highest-impact screens and features first so stakeholders could test early.
Connected the frontend to real data, APIs, and content systems instead of static mockups.
Checked performance, accessibility, and responsive behavior across key breakpoints.
Prepared the project for launch with clear handoff notes and maintainable code.
Conclusion
The Solution
Built a React-based calculator using BigNumber.js to handle precise decimal arithmetic without floating-point errors. Implemented real-time Bitcoin price fetching from multiple exchanges with fallback sources. Created visualizations showing how regular sat purchases compound over time. Added the ability to factor in different DCA strategies and compare results. All calculations are done client-side for privacy since users are entering financial goals.
- A focused implementation plan tied to the client workflow
- Reusable components and data structures that reduce future rework
- Launch-ready pages with project-specific SEO and performance checks
Frontend Engineering
Responsive Vue, Nuxt, and React interfaces built around the project goals and real user tasks.
Content and Integrations
CMS, API, analytics, and third-party integrations wired into the parts of the product that need them.
Launch Support
QA, deployment checks, and practical handoff work that keeps the site easy to maintain after release.