Engineering Lead, Wallets (NYC)

Location

New York, New York. Telecommuting permitted up to 1 day/week.
Type of employment

Full-time, indefinite contract
Seniority

3+ years of experience
Compensation

Base salary range: $225,000 - $250,000

Note: This range reflects base salary only. Final level, team assignment, and compensation are determined during the interview process based on experience and fit.

• Stock options are part of every full-time offer, granted on top of the base salary range above. We want everyone here to be a genuine stakeholder in what we're building.
• We conduct two performance reviews annually. The first addresses performance ratings, bonuses, and promotions. The second encompasses these elements along with salary adjustments reflecting inflation and market conditions.

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.
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).

About You

Must-haves

We 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 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.

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.

Our Principles

• Results and delivery: Ship high quality work fast.
• Build for the long term: Build scalable, secure, and reliable solutions. Use AI.
• Extreme Ownership: Be an effective Directly Responsible Individual (DRI). Be proactive.
• Be a team player: Be an effective and kind colleague providing credible challenge. Be present and reliable.

Talent research indicates that women are often less inclined than men to apply for a role unless they have experience in 100% of the listed skills. However, this list is only a guide. We welcome your application even if you feel you meet around 75% of the requirements. At Crossmint, we believe skills can be learned, and diversity makes us stronger.

Please note that Crossmint never conducts AI-based interviews, and all of our processes include an initial video call with a team member. Crossmint will not request your personal identification documents or any payment at any point during your interview process. Please stay vigilant about potential fraud. If you receive an email that claims to be from Crossmint but ends with any domain other than @crossmint.com, @crossmint.io or @paella.dev, it is not from us. We own these three domains listed before, and they are the only legitimate ones.

Please let our Talent Team know if you need any assistance completing any forms, or participating in the process.
Who will be in contact with you

Our People Ops team will be joining you throughout the entirety of the interview and onboarding processes. Feel free to reach out if you need anything!

• Adolfo Fernández - Head of People Ops
• Gloria Alogo - People Ops, Onboarding & Benefits

⚠ Please note that these are the only members of our People Ops team. Please remain vigilant and watch out for impersonators.

Follow us on Linkedin and X to keep updated with our latest activity! 👣