Senior Software Engineer · Whiteville-Coin
Whiteville, NC · Remote
- Built a fully-functional community cryptocurrency platform with a fixed 210,000-coin supply and a live pricing oracle that averages the CoinGecko Top-50 USD prices every 60 seconds via SSE fan-out.
- Implemented a complete brokerage with Stripe checkout sessions, idempotent webhook settlement, and instant sell/withdraw logic priced at the live oracle rate with a 0.5% platform fee — sandbox mode when live keys are absent.
- Delivered a dependency-free SVG real-time chart with 1D/1W/1M/6M/1Y/ALL ranges, hover tooltips, and seeded history, plus an admin console, scrypt-hashed accounts, signed HttpOnly sessions, and a full ledger with P&L tracking.
- Architected a resilient data layer on SQLite with double-entry bookkeeping, atomic JSON writes, and a cloud backup that pushes the DB to a private GitHub repo every 5 minutes and restores at boot.
- Built auth middleware (pageAuth, apiAuth, adminOnly, sameOrigin), pdfkit + nodemailer tax reports (PDF/CSV/JSON), SEO (meta, canonical, OG/Twitter, sitemap, JSON-LD), and WhitevilleCoin.sol with a full compliance framework.