| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
SwapRail | Remote |
| |||
Wert | Remote | $38k | |||
Tether Operations Limited | Milan, Italy | $54k - $100k | |||
Tether Operations Limited | Barcelona, Spain | $105k - $120k | |||
| Learn job-ready web3 skills on your schedule with 1-on-1 support & get a job, or your money back. | | by Metana Bootcamp Info | |||
Tether Operations Limited | Warsaw, Poland | $105k - $120k | |||
Zscaler | Remote | $140k - $200k | |||
Zscaler | Remote | $147k - $210k | |||
Okx | Remote | $106k - $114k | |||
Sfox | Remote | $112k - $127k | |||
Bitgo | Remote | $200k - $240k | |||
Ondo Finance | United States | $87k - $97k | |||
Lido | Remote | $84k - $110k | |||
Inmobi | Remote | $63k - $72k | |||
Groma | Boston, MA, United States | $90k - $110k | |||
Bitpanda | Remote | $106k - $114k |
## Responsibilities
- Integrate major Web3 wallets (e.g., MetaMask, WalletConnect, Coinbase Wallet) across web and mobile environments
- Design and implement secure transaction signing pipelines (EIP-1559, EIP-712, typed data, permit flows)
- Build robust wallet connection systems, including session persistence, reconnection, and multi-account handling
- Implement transaction building logic, including calldata construction, batching, and multi-step execution flows
- Develop gas estimation, fee optimization, and fallback strategies across different networks
- Handle edge cases such as nonce management, transaction replacement (speed up / cancel), and re-org scenarios
- Collaborate with backend teams on routing, simulation, and execution layers
- Work closely with frontend teams to ensure seamless UX for wallet interactions and transaction confirmations
- Ensure high security standards in key handling, signing flows, and user interaction surfaces
## Requirements
- Strong proficiency in JavaScript / TypeScript
- Hands-on experience with Web3 libraries (ethers.js, viem, web3.js)
- Deep understanding of EVM transaction lifecycle and structure
- Experience implementing wallet connection and signing flows in production
- Familiarity with RPC providers, node inconsistencies, and network reliability issues
- Experience building or contributing to Web3 applications (DEX, wallet, aggregator, etc.)
## Nice to Have
- Experience with multi-chain environments (Ethereum, Arbitrum, BSC, Polygon, etc.)
- Familiarity with account abstraction (ERC-4337)
- Experience with smart contract interaction patterns (multicall, proxy, upgradeable contracts)
- Understanding of MEV, slippage, and transaction execution risks
- Experience working on DeFi protocols or trading-related products
What does a JavaScript developer in web3 do?
A JavaScript developer in web3 would likely be responsible for developing applications and other software using the JavaScript programming language within the web3 ecosystem
Web3 refers to the third generation of web technology, which emphasizes the use of decentralized technologies such as blockchain and distributed ledger systems
This means that a JavaScript developer in web3 would need to be familiar with these technologies and how to use them in the development of applications and other software
They may also be responsible for maintaining and updating existing web3 applications, as well as working with other members of a development team to create new web3 applications.