Write high-quality production code that is correct, secure, performant, and maintainable.
Build and scale wallet infrastructure components, including wallet creation, signing flows, transaction orchestration, and lifecycle management.
Implement and evolve programmable wallet primitives, such as modular signers, delegated transaction logic, and permissions enforced onchain.
Build backend services, APIs, and frontend tools that empower developers to integrate Crossmint wallets and developer experiences at scale.
Design scalable, secure systems that bridge onchain and offchain components while maintaining data integrity and compliance.
Contribute to architecture and design documentation to shape the long-term evolution of Crossmint wallet products.
Own features end to end from design to production deploy and iteration.
Participate in paid on-call rotations once or twice per quarter.
Mentor and support teammates to help grow the engineering organization.

Strong communication skills in written and spoken English.
Bachelor’s degree in Computer Science or equivalent professional experience.
3 to 5+ years building production systems, ideally with backend and full-stack responsibilities.
Strong programming skills in at least one modern language such as TypeScript (Ideal), JavaScript, Java, Python, or similar.
Experience with wallet infrastructure, transaction systems, or blockchain-related services.
Solid understanding of blockchain fundamentals, including smart contract interactions, gas abstraction, and transaction lifecycles.
A product and ownership mindset with an ability to balance usability, security, and long-term reliability.

Extensive access to leading AI tools and subscriptions, with AI actively encouraged and integrated into daily workflows.
Stock options program.
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.
Unlimited, flexible PTO.
Flexible work schedule.
Company laptop and allowance for any necessary home equipment.
Daily stipend for commuting to the office.
Company-paid trips for annual off-sites and onsites.
Insurance covered by Crossmint.
401(k) Plan.

Full-stack Engineer – Wallets

Key skills