Job Title: Blockchain Developer | Solidity, DeFi, Crypto Payments, Web3 Backend | Remote

I build secure, production-ready Web3 systems for founders, startups, and product teams. My work is strongest where Solidity and backend infrastructure meet: smart contracts, wallet flows, transaction processing, APIs, databases, deployment, and post-launch reliability.

Services

Solidity Smart Contracts: ERC-20, ERC-721, ERC-1155, staking, vesting, escrow, token launches.
DeFi Development: Token swaps, bonding curves, liquidity logic, fair-launch platforms.
Crypto Payment Systems: USDT payments, escrow flows, deposits, withdrawals, wallet dashboards, multi-wallet infrastructure.
Web3 Backend Development: Node.js, NestJS, TypeScript, PostgreSQL, Redis, Docker, AWS.
dApp Integrations: React, Next.js, MetaMask, Ethers.js, Web3.js, Wagmi.
Security and Production Support: Smart contract review, gas optimization, API cleanup, backend hardening, deployment support.

Qualifications & Proof

100% Job Success on Upwork.
$10K+ earned with 399+ hours worked.
CEH-certified security background.
Experience with crypto payment infrastructure, ERC-20 swaps, fair-launch systems, NFT marketplaces, wallet flows, and backend-heavy SaaS systems.

Portfolio & Links

Portfolio: dhirajlochib.com
GitHub: github.com/dhirajlochib

Compensation

Hourly Rate: $40/hr

Fixed-price milestones are also possible for clearly scoped builds:

Smart contract review/fix: from $499
Small integration/module: $500–$1,000
Web3 backend or DeFi module: $1,000–$2,500
Production crypto payment or DeFi system: $2,500–$5,000+

Best Fit

Funded startups, CTOs, agencies, and founders building Web3, fintech, DeFi, crypto payment, or backend-heavy products.

Interested? Please PM with your project scope, current stage, target chain, timeline, and budget range.