Project description
We are seeking an Expert Blockchain Developer for a short-term, fixed-scope engagement to facilitate a smooth vendor handoff of our blockchain tokenization platform. The system is designed to capture external off-chain data feeds and utilize that data to mint utility and financial tokens. The architecture leverages Ethereum and Polygon (L2) for smart contract execution, and relies on IPFS for storing metadata, slow-moving reporting data, and JSON files.
Responsibilities
- Your primary goal is to ensure a seamless technical transition from the previous development vendor to our new team. You will audit the current Web3 architecture, evaluate the existing smart contracts, and validate the operational approach for the platform's overall blockchain infrastructure. This is a fixed-scope engagement expected to run for a few weeks. Key responsibilities include:
- Smart Contract Code Review: Conduct a comprehensive code review and audit of the existing Solidity smart contracts, including the core ERC-20 token contracts, certificate data structures, and the central minting controller logic.
- Architecture & Approach Evaluation: Assess the overall Web3 architecture. Specifically, evaluate the strategy of storing metadata and large binary object (BLOB) files on IPFS, while rolling up volume-based transactions on the Polygon blockchain.
- Web3 Tooling Assessment: Review, validate, and document the current Hardhat development kit setup to ensure it is ready for the new team to take over.
- Gas Optimization & Operations: Analyze the smart contracts to ensure they are designed with a very low gas footprint. Evaluate the overall operational gas fees associated with the continuous minting and burning of tokens on the network.
- Integration Audit: Evaluate how the blockchain layer interacts with the system's centralized off-chain services, such as the backend APIs and cloud-managed blockchain nodes.
SKILLS
Must have
- Extensive professional experience as a Blockchain Developer specializing in Ethereum (L1) and Polygon (L2) network ecosystems.
- Proven track record working with ERC-20 fungible token standards, including implementing customized minting, burning, and access‑control mechanisms.
- Strong hands‑on experience using Hardhat as a Web3 development, testing, and deployment environment.
- Deep expertise in writing, auditing, and securely deploying Solidity smart contracts.
- Strong ability to audit code for security vulnerabilities, analyze operational gas costs, and recommend or implement architectural optimizations.
- Demonstrated understanding of decentralized storage, specifically utilizing IPFS for handling JSON metadata and large files.
Nice to have
- Domain knowledge of tokenizing Real-World Assets (RWA) or integrating off‑chain industrial data feeds.
- Familiarity with cloud infrastructure, specifically managed blockchain services and serverless computing (e.g., AWS Managed Blockchain, Lambda).
- Understanding of data privacy techniques in Web3, such as utilizing encryption protocols for private IPFS data or implementing Zero Knowledge Proofs (ZKP).
- Familiarity with the broader technological stack commonly utilized alongside Web3 platforms (e.g., ReactJS, Node.js, Python, PostgreSQL, Terraform, Docker).
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