Senior Web3 Engineer (Remote)

Our client is building the next generation of digital asset and tokenization infrastructure and is seeking a Senior Web3 Engineer to join a growing engineering team focused on blockchain-enabled financial services. This role will help design, build, and scale enterprise-grade blockchain platforms supporting tokenized assets, smart contract integrations, wallet and custody services, transaction orchestration, and distributed ledger technologies. The ideal candidate has deep expertise in blockchain engineering and enjoys solving complex challenges across both public and permissioned blockchain ecosystems. You will work across technologies including Ethereum, Hyperledger Besu, Canton/Daml, EVM-compatible networks, and emerging tokenization frameworks while helping establish the foundational infrastructure that powers future digital asset initiatives.

Key Responsibilities Web3 Platform Engineering * Design and build reusable platform services supporting tokenization, wallet integration, blockchain connectivity, transaction processing, and digital asset lifecycle management. * Develop backend services that integrate with blockchain nodes, custody platforms, wallets, signing systems, and smart contracts. * Build blockchain abstraction layers capable of supporting multiple blockchain networks and protocols. * Develop solutions supporting Ethereum, EVM-compatible chains, Hyperledger Besu, Canton/Daml, and permissioned blockchain environments. * Implement blockchain connectivity utilizing JSON-RPC, WebSocket subscriptions, event monitoring, transaction tracking, and smart contract interactions. * Build distributed systems capable of supporting high-volume digital asset transactions and enterprise-grade scalability.

Smart Contract & Tokenization Development * Design, develop, review, and integrate smart contracts supporting tokenized asset solutions and programmable workflows. * Work with Solidity and EVM token standards to develop secure and scalable blockchain applications. * Build application layers responsible for transaction creation, ABI encoding/decoding, contract state management, event processing, and transaction simulation. * Establish development standards around smart contract testing, deployment, governance, versioning, and release management. * Support security initiatives including threat modeling, static analysis, fuzz testing, and secure deployment processes.

Wallet, Custody & Transaction Services * Integrate with institutional wallet, custody, signing, and authorization platforms. * Design transaction orchestration services covering validations, approvals, policy enforcement, signing workflows, and transaction monitoring. * Support account and wallet registration, approval workflows, transaction controls, and audit requirements. workflows, and transaction monitoring. * Build reliable solutions for transaction tracking, confirmation monitoring, exception handling, and operational support.

• 5+ years of software engineering experience building distributed systems, financial platforms, transaction processing systems, blockchain infrastructure, or high-scale backend applications. * Strong hands-on experience developing Web3 and blockchain-based solutions. * Deep understanding of Ethereum and EVM ecosystems, including: * Smart Contracts * Transaction Lifecycle Management * ABI Encoding & Decoding * Event Logging * Gas & Fee Management * Nonce Management * Transaction Finality * Experience building services that interact directly with blockchain nodes, wallets, smart contracts, custody providers, and signing platforms. * Experience with: * JSON-RPC * WebSocket Connections * Blockchain Event Indexing * Smart Contract Integrations * Transaction Monitoring * Strong understanding of custody models, wallet infrastructure, digital asset security, key management, and transaction signing. * Proficiency in one or more of the following: * Java * Go * Kotlin * TypeScript * Rust * Python * C+* Experience developing APIs, microservices, event-driven systems, and cloud-native applications. * Ability to independently own architecture, development, testing, deployment, and production support responsibilities. * Experience with Hyperledger Besu, permissioned blockchain networks, or private blockchain environments. * Experience working with Canton, Daml, validator infrastructure, participant nodes, or institutional blockchain platforms. * Experience supporting tokenization initiatives, digital assets, or blockchain-based financial products. * Experience with smart contract audits, static analysis, fuzz testing, formal verification, or secure deployment practices. * Experience developing: * Blockchain Indexers * Wallet Platforms * Custody Integrations * Transaction Orchestration Systems * Token Lifecycle Management Platforms * Familiarity with token standards including: * ERC-20 * ERC-721 * ERC-1155 * ERC-1400

• ERC-3643 * Experience operating within regulated financial services or security-sensitive environments. * Blockchain certifications or formal blockchain training.