Web3 Developer

TechHavenLabs

today

Verified

Role details

Languages

English

Experience level

Intermediate, Senior

Compensation

€ 7-8K

Remote

Node.js

React

GIT

Blockchain

Web3

Develop and maintain user-facing Web3 application features.
Integrate cryptocurrency wallets such as MetaMask, WalletConnect, Coinbase Wallet, and similar wallet solutions.
Connect frontend applications to deployed smart contracts.
Implement smart contract read and write operations.
Build cryptocurrency and token transaction flows.
Handle wallet connections and disconnections, account changes, and network switching.
Manage transaction states, including pending, confirmed, failed, rejected, replaced, and dropped transactions.
Display wallet balances, token balances, transaction details, gas estimates, and other blockchain data clearly.
Work with smart contract ABIs, blockchain events, logs, and transaction receipts.
Integrate blockchain RPC providers, indexing services, and blockchain data APIs.
Develop clear error messages and recovery flows for failed Web3 interactions.
Collaborate with smart contract developers during contract integration, testing, and deployment.
Collaborate with backend developers on blockchain event processing, transaction tracking, and data synchronization.
Participate in architecture discussions, sprint planning, and code reviews.
Write clean, reusable, testable, and well-documented code.
Identify and address security, usability, and performance risks.
Support deployments across testnet and production environments.
Troubleshoot wallet, smart contract, network, and transaction issues.
Maintain clear communication and provide regular progress updates.

Strong professional experience with JavaScript and TypeScript
Strong experience with React and modern frontend development
Experience with Next.js or another React framework
Practical experience building Web3 or decentralized applications (dApps)
Experience using ethers.js, viem, wagmi, web3.js, or similar Web3 libraries
Experience integrating browser wallets and WalletConnect-enabled wallets
Experience working with smart contract ABIs
Understanding of Ethereum and EVM-compatible networks
Understanding of blockchain transactions, gas fees, confirmations, and transaction receipts
Experience implementing smart contract read and write functions
Familiarity with ERC-20 tokens and other common Ethereum token standards
Experience working with REST APIs, WebSockets, or blockchain data providers/services
Experience using Git and collaborative development workflows
Ability to communicate technical decisions clearly
Ability to work independently in a remote development environment
Professional written and spoken English

Competitive salary based on experience and skills.
Flexible working hours with a focus on results rather than fixed schedules.
High-quality equipment provided or a home office allowance.
Collaborative international engineering team with a remote-first culture.
Generous paid annual leave and public holidays in accordance with your country of employment.
Paid sick leave and other statutory benefits in accordance with local employment regulations.
Opportunities to influence technical architecture and engineering best practices.
Career growth opportunities as the company and engineering team continue to expand.