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Recruit Ref: L0607871363
Posting Date: 2026-08-28
The Payment Cards Group Limited
Web 3.0 Developer

Responsibilities

  • Design, develop, test, and deploy smart contracts (e.g., Solidity) and related on-chain components.

  • Build Web3-enabled applications (dApps) and integrate wallets, signing, and on-chain reads/writes.

  • Integrate with blockchain infrastructure: RPC providers, nodes, indexers, explorers, and analytics tools.

  • Develop backend services for Web3 products (APIs, event listeners, job workers) and manage contract events.

  • Implement security best practices, conduct code reviews, and support audits/bug bounties.

  • Optimize gas usage and contract performance; manage upgradeability patterns where relevant.

  • Write clean documentation, unit/integration tests, and participate in CI/CD and release processes.

  • Collaborate with product to translate requirements into technical design and delivery plans.


Required Qualifications

  • 2+ years of software engineering experience (Web2 and/or Web3).

  • Hands-on experience with Solidity and EVM-based chains (Ethereum / Polygon / Arbitrum / BSC, etc.).

  • Strong knowledge of smart contract development lifecycle: testing, deployment, verification, monitoring.

  • Experience with Web3 libraries such as ethers.js or web3.js.

  • Familiar with common standards: ERC-20, ERC-721, ERC-1155, and signature schemes (EIP-712).

  • Proficient in at least one backend language (Node.js/TypeScript, Go, Python, or Java).

  • Good understanding of cryptography basics: private keys, hashing, signatures, and wallet security.

  • Comfortable working with Git, code reviews, and agile delivery.


Summary
Industry:
Trading 
Job Category / Function:
IT (Hardware)
Job Position Level:
General 
Employment Term:
Full Time 
Min. Edu. Level Req:
-- 
Minimum QF Level attained:
-- 
Total Working Exp:
-- 
Salary(HKD):
--
Location:
Yau Tsim Mong District / Tsim Sha Tsui
Benefits:
--
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