4+ years of experience building and deploying distributed backend systemsExperience with backend languages, Node.js, TypeScript is preferredExperience with monitoring and log management tools such as Prometheus, Grafana, CloudWatch, ELK Stack, or SplunkExperience with system networking, including aspects like TCP/IP, DNS, load balancing, VPN, VPC, subnetting, and routing protocolsExperience working with various database systems like MySQL, PostgreSQL, or DynamoDBExperience using infrastructure-as-code tools like Terraform, CloudFormation, or AWS CDKAbility to write, test, and debug smart contractsFamiliarity with DeFi protocols and NFT standardsProficiency in writing automated tests for smart contractsExperience working in high-throughput, low-latency environmentsExperience with web3 technologies, including Ethereum, EVM-compatible chains, smart contract interactionExperience working with crypto custody providers, decentralized wallets, or key management tools (e.g., Fireblocks, Gnosis Safe, MPC wallets)Previous work on payment gateways, crypto exchanges, or DeFi protocolsFamiliarity with chain abstraction layers or bridges (e.g., LayerZero, Wormhole, etc.)Knowledge of blockchain data indexing or transaction reconciliationContributions to open-source infrastructure or developer tools