Engineering Lead, Wallets

About the role

As the Engineering Lead for Wallets at Crossmint, you will oversee the development and strategy of programmable smart wallets, impacting clients across multiple blockchains including EVM, Solana, and Stellar. You will lead a team of engineers, ensuring the delivery of high-quality wallet infrastructure and aligning technical priorities with business goals.

Success in this position involves not only managing the technical aspects but also mentoring your team, establishing best practices, and maintaining observability tools to track performance. You will collaborate with various teams to ensure that the wallet products meet the needs of enterprise clients and adapt to evolving market demands.

The salary range for this role is between $225,000 and $250,000.

Skills that matter here

• TypeScript: You will design scalable applications and wallet interfaces using TypeScript.
• React: This role requires high-performance React integrations for decentralized wallet interfaces.
• NestJS: You will develop resilient backend services using NestJS.
• Solidity: Building and deploying smart contracts in production environments is a key responsibility.
• Stellar: You will design multi-chain blockchain infrastructure components including Stellar.
• Datadog: Setting up monitoring and observability solutions using Datadog is essential for system resilience.

Who this role suits

• You have a background in full-stack engineering with at least three years of relevant experience.
• You thrive in a collaborative environment and enjoy mentoring junior engineers.
• You are detail-oriented and prioritize code quality and best practices.
• You are comfortable managing technical projects and aligning them with business objectives.

From the employer

• 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).

• Must have three (3) years of experience in the job offered or in a Full-Stack Engineer or Engineering Lead-related occupation.
• 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.

• 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.