Engineering Lead, Wallets (NYC)

Crossmint•New York, NY

11d•$225,000 - $250,000•Hybrid

About The Position

About Crossmint Global financial rails are undergoing a once-in-a-generation transformation. Instant settlement. Programmable. Agent-first. Crossmint is the infrastructure helping companies build for that future. We are the leading all-in-one stablecoin and wallet infrastructure platform, enabling fintechs, enterprises, and agentic platforms to integrate stablecoin rails with speed, compliance, and scale. Crossmint provides everything enterprises need to ship smart financial rails, including smart wallets, cross-chain stablecoin orchestration, on/offramps, token checkout, and more, all through a single developer-friendly API. Trusted by more than 40,000 clients including global leaders like MoneyGram, Western Union, and Paga to nation states like the Marshall Islands, Crossmint powers stablecoin flows that move billions from cross-border remittances, global payroll, to the world's first digital UBI program. MiCA-authorized, PSD2-licensed, and SOC2 Type II certified, Crossmint serves 150+ countries globally across 50+ blockchains. Backed by Ribbit Capital, Franklin Templeton, NYCA, First Round, and Lightspeed Faction. We're building the infrastructure for the era of programmable finance. Join us! About The Role Smart wallets sit at the center of Crossmint's product. They hold and move stablecoins for our clients. They are also the base layer for the agentic-payments products we are building. As Engineering Lead for Wallets, you will own the technical roadmap and strategy for that infrastructure across EVM, Solana, and Stellar. You will lead a team of 6 engineers, set the standards they ship against, and keep writing production code yourself. You will also connect the wallet stack to the business side. You will work with Product, GTM, and CSE to turn client requirements into roadmap priorities. You will represent the team in architecture reviews and technical calls with partners.

Requirements

Three (3) years of experience in the job offered or in a Full-Stack Engineer or Engineering Lead-related occupation.
Demonstrable experience in 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 third-party 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.

Responsibilities

Serving as Engineering Lead for the Wallets team, owning the full technical roadmap and strategy for Crossmint's 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, as well as agentic-payments customers integrating Crossmint's wallet stack.
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.
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).

Benefits

Extensive access to leading AI tools and subscriptions, with AI actively encouraged and integrated into daily workflows.
Unlimited, flexible PTO.
Parental Leave program.
Flexible work schedule.
Company laptop and allowance for any necessary home equipment.
Daily stipend for commuting to the office and/or meals.
Two company-paid off-sites each year.
Health, dental, vision, life, short-term disability (STD), and long-term disability (LTD) insurances.
401(k) Plan.
Stock options are part of every full-time offer, granted on top of the base salary range above.