Engineering Lead, Wallets

Job Duties: * Serving as Engineering Lead for the Wallets team, owning the full technical roadmap and strategy for Crossmints programmable smart-wallet infrastructure across EVM, Solana, and Stellar blockchains. * Driving end-to-end architectural design and delivery of on-chain wallet primitives including smart-contract signers, recovery signers, delegated signer scopes/permissions, gas sponsorship, wallet creation billing, device signers, and multi-chain transaction orchestration via Temporal distributed workflows. * Leading the technical direction for wallet products serving enterprise clients such as MoneyGram, Marshall Islands (UBI program), OpenSea, and Robinhood Chain, as well as agentic-payments customers integrating Crossmints wallet stack with Mastercard, Cloudflare, and AWS Agent Core Payments. * Coordinating directly with the GTM, CSE, and Product teams to align wallet roadmap priorities with commercial requirements, including defining differentiation positioning around on-chain programmability, no-vendor-lock-in architecture, and enterprise-grade stablecoin product integration. * Establishing and enforcing engineering best practices for the team: code quality standards, PR review guidelines, AI-assisted development workflows using Devin, structured sprint planning, retro action items, and technical documentation. * Setting up and maintaining observability infrastructure including Datadog dashboards for endpoint success rates, latency, and transaction throughput across all wallet-related services. * Managing a team of 6 direct reports across seniority levels (2 senior contractors, 2 senior engineers, 2 mid-level engineers), overseeing onboarding, performance coaching, and technical mentoring. * Representing the wallets team in cross-functional planning, product status updates, architectural reviews, and external vendor/partner technical calls (Temporal, ZeroDev, Phala, Alchemy, Rain). * Actively contributing production code: designing and merging complex PRs spanning wallet signer authorization, EVM UserOperation bundler flows, Solana fee estimation, Stellar V2 smart contract infrastructure, card-collateral topup workflows, and SDK bug fixes across web and mobile (React Native, Expo, Kotlin, Flutter). Telecommuting permitted up to 1 day/week. Requirements: Employer will accept three (3) years of experience in the job offered or in a Full-Stack Engineer or Engineering Lead-related occupation. Position requires demonstrable experience in the following: * TypeScript: designing scalable, production-grade full-stack applications and decentralized wallet interfaces, including high-performance React integrations. * Developing resilient backend services using NestJS, distributed task orchestration via Temporal workers, blockchain data processing, and real-time event handling. * Building, auditing, and deploying Solidity and Stellar/Soroban smart contracts in production environments, ensuring compliance with security standards and gas-optimization best practices (including Halborn/Latacora audit remediation). * Designing and maintaining multi-chain blockchain infrastructure components across EVM (Ethereum, Polygon, Avalanche, Arbitrum, Base), Solana, and Stellar: smart-contract factories, event indexers, webhook pipelines, and on-chain/off-chain data systems. * Designing and deploying monitoring, observability, and fault-tolerant solutions using Datadog and Temporal to ensure system resilience and high throughput at scale. * Leading and mentoring engineering teams including conducting technical interviews, defining best-practice standards, and driving code quality through structured review processes. * Managing distributed AI-assisted engineering workflows (Devin) to accelerate delivery while maintaining architecture integrity and code quality. How to apply/Contact information: To apply, please visit https://crossmint.na.teamtailor.co