GFT Technologies ★ 3.9

We are seeking an experienced and passionate Smart Contract Developer to join our team. This role focuses on designing, implementing, and maintaining secure and scalable blockchain-based smart contracts while collaborating with cross-functional teams to ensure seamless integration with cloud and fullstack applications.

Role Responsibilities

• Design, develop, and maintain secure, efficient, and upgradable smart contracts using Solidity
• Implement upgradable contract patterns (e.g., UUPS, Diamond Storage) to ensure flexibility and maintainability
• Develop, test, and deploy smart contracts using Hardhat and related development tools
• Interact with Ethereum and other EVM-compatible networks using ethers.js and blockchain development frameworks
• Work with blockchain infrastructure and security tools, including Alchemy SDK and Fireblocks SDK for managing blockchain transactions and security
• Collaborate with frontend teams to integrate smart contracts with Wagmi and other Web3 libraries
• Ensure blockchain applications follow best practices in security, gas optimization, and performance
• Participate in the on-call rotation, responding to incidents related to blockchain infrastructure and smart contract operations
• Implement monitoring, alerting, and logging for blockchain-related services to ensure system stability
• Work closely with backend, DevOps, and security teams to ensure smooth deployment and secure integration of smart contracts

Required Education & Experience

• 5+ years of experience in smart contract development with Solidity
• Proficiency in smart contract security best practices, including common attack vectors (e.g., reentrancy, front-running, integer overflow/underflow).
• Hands-on experience with upgradable contract patterns such as UUPS, Diamond Storage
• Strong experience using Hardhat for smart contract development, testing, and deployment
• Proficiency with ethers.js for interacting with Ethereum and other EVM-based networks
• Experience with Alchemy SDK and Fireblocks SDK for blockchain development and security
• Familiarity with Wagmi for frontend blockchain interactions
• Experience working with Azure Cloud Services, including deploying blockchain infrastructure
• Experience with CI/CD pipelines and DevOps practices (e.g., GitHub Actions) for automated smart contract deployments
• Familiarity with monitoring and observability tools for blockchain applications
• Ability to work under pressure and handle high-priority incidents efficiently
• Strong communication skills in English and Vietnamese for effective collaboration with global and local teams.

Preferred Qualifications

• Experience working with layer-2 scaling solutions (e.g., Optimism, Arbitrum, zkSync)
• Familiarity with smart contract auditing tools and security analysis
• Knowledge of Ethereum RPCs and blockchain indexing services
• Experience with containerization technologies (Docker, Kubernetes, Helm)
• Familiarity with Infrastructure as Code (IaC) tools such as Terraform
• Experience with document databases (e.g., MongoDB)
• Knowledge of queueing and caching mechanisms (e.g., Redis)
• Familiarity with Azure managed services (e.g., Kubernetes Service, Cosmos DB, Key Vault, Service Bus, Entra).

What We Offer

• The opportunity to work on cutting-edge blockchain solutions with a highly skilled team
• A fast-paced, collaborative, and learning-focused environment
• Competitive compensation and benefits
• Career growth opportunities in a rapidly expanding team
• A chance to work on innovative Web3 and cloud-based applications.