Bitcoin & Crypto Developer | Blockchain Architect | Smart Contract Engineer

💼 Freelancer Profile: Expert Bitcoin & Crypto Developer | Blockchain Architect | Smart Contract Engineer
🔹 Overview

Hello and welcome! I’m a Senior Blockchain Developer with over 7 years of experience in cryptocurrency and blockchain development, specializing in Bitcoin protocol, smart contracts, Layer 1/2 solutions, and DeFi ecosystems. Whether you're launching a Bitcoin-based application, designing secure wallet infrastructure, or creating smart contracts for your token economy, I'm here to help bring your vision to life with clean, secure, and scalable code.

I’ve worked with startups, enterprise firms, and solo entrepreneurs to build everything from decentralized exchanges (DEXs) and crypto wallets to NFT platforms and Bitcoin payment integrations. My focus is on delivering robust solutions that align with Web3 innovation, ensuring both security and speed-to-market.
🧠 Core Expertise

🔐 Bitcoin & Crypto Protocol Development

Deep understanding of the Bitcoin Core architecture and P2P networking layer
Implementation of custom Bitcoin wallets, payment channels, and Lightning Network integrations
Knowledge of Bitcoin Improvement Proposals (BIPs), Taproot, Schnorr signatures
Development and deployment of custom Bitcoin nodes and forks for new blockchains

📜 Smart Contracts & Blockchain Logic

Writing secure smart contracts in Solidity (Ethereum), Rust (Solana, Polkadot), and Simplicity (Bitcoin Script enhancement)
Contract auditing and gas optimization
Integration with oracles (Chainlink, Band Protocol)
DAO and tokenomics implementation (ERC-20, ERC-721, ERC-1155, BRC-20)

🌐 Full-Stack dApp Development

Frontend: React.js, Next.js, Vue.js, Web3.js, Ethers.js
Backend: Node.js, Python (Flask/Django), Golang
Blockchain integrations: Bitcoin, Ethereum, Binance Smart Chain, Polygon, Avalanche, Solana

💼 Wallet & Exchange Solutions

Custom crypto wallet creation (hot, cold, hardware-integrated)
Multi-signature wallet solutions
Integration of Bitcoin and altcoin payment gateways
CEX & DEX development with full order-matching engine

🚀 Services I Offer

Bitcoin-Based App Development
Custom Bitcoin nodes and wallets
Blockchain explorers using Bitcoin Core RPC/API
Lightning Network-enabled apps for micropayments
Smart Contract Design & Deployment
Secure smart contract architecture
NFT minting platforms and marketplaces
DeFi protocols: staking, lending/borrowing, yield farming
Crypto Wallet Solutions
Desktop, mobile, and browser-based wallets
Multi-currency support (BTC, ETH, USDT, etc.)
Hardware wallet integration (Ledger, Trezor)
Token Creation & Management
Token generation on Ethereum, BNB Chain, and Bitcoin Layer 2s
Token sales (ICO/IDO/IEO platforms)
Tokenomics consulting and implementation
Blockchain Auditing & Security
Manual and automated smart contract audits
Penetration testing for dApps
Blockchain forensic services
DeFi & Web3 Integrations
Cross-chain bridges (Wormhole, Axelar)
On-chain/off-chain data flow via oracles
Integration with MetaMask, WalletConnect, and other wallets
Crypto Payment Gateways
Integration of crypto payment APIs for eCommerce or service-based businesses
Self-hosted payment solutions with privacy-preserving features
Support for BTC, ETH, USDT, BUSD, and more

🛠️ Tech Stack

Blockchain Platforms: Bitcoin, Ethereum, BNB Chain, Polygon, Solana, Avalanche, Polkadot
Languages: Solidity, Rust, Go, Python, JavaScript, C++, TypeScript
Tools & Frameworks: Hardhat, Truffle, Brownie, Web3.js, Ethers.js, BitcoinJS, btcd, LND
Databases: MongoDB, PostgreSQL, LevelDB, Redis
Security Tools: Slither, MythX, Echidna, Manticore, Tenderly
DevOps: Docker, Kubernetes, GitHub Actions, AWS, IPFS, The Graph

📈 Notable Projects
🔹 Bitcoin Wallet & Node Infrastructure

Developed a multi-currency crypto wallet that integrated directly with Bitcoin Core and Electrum servers, including support for SegWit and Lightning Network transactions.
🔹 NFT Marketplace (Ethereum + IPFS)

Created a fully decentralized NFT marketplace with ERC-721 smart contracts, IPFS-based storage, and MetaMask wallet integration, supporting royalty splits and lazy minting.
🔹 DeFi Lending Platform

Engineered a lending/borrowing protocol with collateralized loans, liquidation logic, and dynamic interest rate calculations. Full-stack build using Solidity, Web3.js, and The Graph.
🔹 Lightning Network Integration

Built a Bitcoin-based tipping and micropayment system using LND, integrating with a custom web app for instant settlements and user-friendly UX.

🎓 Education & Certifications

BSc in Computer Science, University of [Your University Name]
Certified Blockchain Developer – Blockchain Council
Ethereum Developer Bootcamp – ConsenSys Academy
Bitcoin Programming Masterclass – Udemy

👥 Why Clients Hire Me

✔ Proven Experience: With over 7 years in the blockchain space, I bring both depth and versatility to every project.
✔ Security-First Mindset: I follow industry best practices to ensure every smart contract, wallet, or dApp is safe and thoroughly tested.
✔ Clear Communication: I’m committed to transparent and prompt communication, ensuring you’re updated at every step.
✔ End-to-End Capability: From protocol-level development to frontend dApp UIs, I can handle projects from concept to deployment.
✔ Flexible Engagement: Whether you need a one-off solution, a long-term contributor, or a team lead — I adapt to your project’s needs.
📬 Let’s Talk!

If you’re looking for a reliable and highly skilled Bitcoin/crypto developer who understands both the technical and economic dimensions of Web3, let’s connect.

Drop me a message to discuss your project. I’d be glad to provide a free consultation, initial architecture planning, or a detailed estimate for your build.

Thanks for visiting my profile — I look forward to helping you build the future of finance, one block at a time. 🚀

Keywords (for search optimization): Bitcoin developer, crypto developer, smart contract engineer, Solidity developer, Lightning Network, dApp developer, Ethereum, DeFi, blockchain expert, NFT marketplace, crypto wallet developer, Web3 developer