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Full-Stack Developer | System Architect | Problem Solver

0 Production Systems

0 + Technologies

0 % Live on Mainnet

<about>

System Profile

Full-stack engineer specializing in production backend systems for fintech and blockchain applications. I architect, build, and deploy complex real-time platforms that handle live market data, AI integration, and mission-critical financial operations.

My expertise spans high-performance backend architecture (Node.js/Fastify, PostgreSQL, Redis), blockchain infrastructure (Solana/Rust smart contracts), AI integration (OpenAI, Llama), and real-time data pipelines from major exchanges (Binance, Bybit, Hyperliquid). I build systems with proper authentication, rate limiting, caching strategies, and security hardening - not just prototypes, but production-grade platforms serving real users and processing real transactions.

Whether it's designing SaaS architectures with freemium models, implementing on-chain payment protocols with escrow and SLA enforcement, or building AI-powered trading analytics - I solve complex engineering challenges while maintaining code quality, system reliability, and user experience at scale.

Crypto-native engineer with deep interest in algorithmic trading, automation, and quantitative systems. Strong focus on cryptographic protocols, security hardening, and exploring AI/ML applications in financial technology.

Get in Touch →

capabilities.jsconst developer = {
  handle: "@yzzzbtc",
  focus: ["Backend", "Real-time Systems", "Blockchain", "AI"],
  
  backend: [
    "TypeScript", "Fastify", "PostgreSQL", "Redis",
    "JWT/RBAC", "Rate limiting", "Idempotency keys"
  ],
  
  realtime: [
    "WebSocket streams", "Event normalization",
    "Backpressure handling", "Outbox & de-dup"
  ],
  
  blockchain: [
    "Solana", "Rust/Anchor", "Token-2022 (fees/hooks)",
    "Escrow & settlement flows", "On-chain auditability"
  ],
  
  ai: [
    "OpenAI integration", "Prompt engineering",
    "Cost & latency optimization", "Fallback strategies"
  ],
  
  security: [
    "Per-tenant RBAC", "Signed webhooks (HMAC/Ed25519)",
    "Bot/abuse defenses", "Input validation", "Audit trails"
  ],
  
  reliability: [
    "Health probes", "Structured logging + trace IDs",
    "SLOs & error budgets", "Runbooks"
  ],
  
  infra: [
    "CI/CD", "Railway/Vercel", "Containers", "Preview envs"
  ],
  
  patterns: [
    "Contract-first APIs", "Schema migrations",
    "Job queues", "Secrets hygiene"
  ],
  
  shipped: { systems: 3, mainnet: 3 },
  builds: "Solo/Lead",
  status: "Available"
};

Featured Work

Production

BT4T Trading Tools

Professional SaaS trading platform with AI-powered trading journal that identifies profit leaks and behavioral patterns. Real-time market intelligence from Binance/Bybit/Hyperliquid with freemium model ($0/$19/$39). Full-stack TypeScript with OpenAI GPT-4o-mini integration.

TypeScript Fastify PostgreSQL OpenAI

View Live Pricing

Production

SPIN Casino

Transparency-first gaming platform on Solana with provably fair randomness, industry-first responsible gambling controls, and Token-2022 lottery mechanics. Built entirely solo with comprehensive security features.

Solana Next.js 14 Redis Token-2022

View Live Docs

Production

x402-Assured

Solana-based HTTP 402 payment protocol with escrow, SLA enforcement, and cryptographic audit trails. Built for x402 hackathon with streaming payments, provider bonding, and verified fallback mesh.

Solana Rust TypeScript React

View Live GitHub

Engineering Capabilities

Backend Architecture

Fastify APIs with TypeScript and schema validation
PostgreSQL schema design and query optimization
Redis for caching, rate limiting, distributed locks, job queues
JWT authentication and session management
CORS, security headers, CSRF protection

Real-time Data Systems

WebSocket stream processing and connection management
Multi-source data integration and normalization
Event-driven architecture with backpressure handling
Real-time aggregation and time-series data
Latency optimization and monitoring

Blockchain Development

Solana programs in Rust using Anchor framework
Token-2022 extensions and transfer hooks
On-chain escrow and payment protocols
Ed25519 signature verification
Smart contract deployment and maintenance

AI/ML Integration

OpenAI API integration and prompt engineering
Context management and conversation flows
Cost optimization and rate limiting
Behavioral analysis and pattern recognition
Deterministic logic with AI augmentation

Security & Reliability

Rate limiting and bot detection
Signed webhooks and cryptographic audit trails
Health checks and monitoring endpoints
Structured logging and incident response
Backup strategies and data integrity

Full-Stack & Infrastructure

React and Next.js 14 application development
Docker containerization and orchestration
CI/CD pipelines with GitHub Actions
Railway and Vercel deployment
Performance optimization and cost management

Initialize Connection

Let's Build Something

Available for freelance projects, full-time opportunities, or technical consultations. If you're looking for a developer who can deliver exceptional results, let's connect.

Email yzzz@bt4t.pro

GitHub @yzzzbtc

X / Twitter @yzzzbtc