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About Crossmint

At Crossmint we're on a mission to bring the world on-chain. This is an urgent and important matter: as artificial intelligence advances, the lines of what is real and not, are blurring - fostering a growing issue of bot spam, disinformation, deepfakes, and corruption. By bringing the world on chain, we can create cryptographic proofs that restore our ability to discern what is true.
How do we do this?

Crossmint is accelerating this transition, by building APIs and tools that make it 100x easier to create, custody and commerce with digital assets (NFTs) and credentials (VCs).
How do we fund this mission?

We sell our tools and APIs as a service to other companies who wish to integrate NFTs, wallets or credentials inside their systems. We save these companies hundreds of thousands of dollars in infrastructure and engineering, and charge them a fraction to manage all for them in a secure, compliant and low maintenance way. More than 30,000 devs and companies have used us, including Mastercard, Microsoft, Etihad Airways, Red Bull, Adidas, Asus, AC Milan, Phantom, Rarible, Refik Anadol, and Snoop Dogg.

In addition, Crossmint is backed by top tier investors and angels in the fintech and crypto space.
Who are we looking for?

We are looking for folks with extreme ownership, competence and integrity. Our team includes math olympiad winners, Guinness world record holders, athletes, music composers, empaths, and degens. Diverse applicants are encouraged to apply.
Location

New York (preferred) or Miami
Type of employment

Full-time
Seniority

Senior (4-7 years), Principal (7+ years)
Salary Range

Brooklyn: $205,000 to $220,000
Responsibilities

As a Blockchain Engineer at Crossmint, you will be developing smart contracts, protocols, and backend integrations around them at the forefront of wallets & digital assets Your responsibilities will include:

• Write high quality smart contract code: correct, gas optimized, maintainable.
• Write secure code: follow security best practices, work with auditors to find bugs.
• Write integration code: for the deployment, observability and maintenance of smart contracts, and/or interactions with the contracts from our backend and frontend.
• Write architectural and design docs: individually and with the team
• Run your projects end to end: from conceptualization, to shipping and beyond.
• Perform On-Call duties: participate in paid on-call shifts (once or twice a quarter).
• Mentor new team members

About you

To thrive in this role, you should possess the following qualifications:

• Provable experience shipping high quality smart contract code
• Excellent reading and writing comprehension skills in English
• Experience working on a team and references to back it
• Educational Background: Hold a Bachelor's degree in Computer Science or a related field, or equivalent knowledge and skills with industry experience.
• Professional Experience:
  • 2+ years of experience working on smart contract development. Reusing an existing OpenZeppelin contract for an NFT drop doesn't count, we look for novel smart contract development experience.
  • 2+ years working on security critical projects. We will ask you about how you ensure your code has the lowest chances of including bugs in production.
  • 2+ years designing protocols in one of more of the following fields: blockchain applications, decentralized finance, digital credentials and identity, authentication, authorization or distributed systems.
• Programming Expertise: Demonstrate expertise in multiple modern programming languages, including a focus on smart contract languages such as Solidity (p0), Rust (p1), or Move (p2)

Preferred Experience

We highly value candidates with any of the following experiences:

• Security / Cryptography background: Alternatively a background in mathematics, programming or security competitions (auditing, CTF, etc).
• Blockchain / smart contract knowledge on non EVM chains: Solana (rust), Sui (move), Aptos (move), or Cardano.
• Onchain: Have used crypto products (collected or created digital assets, participated in Defi, or created a Farcaster profile, etc), and formed opinions about how to move the industry forward.
• Published EIPs, patents, open source code or standards, or research papers in relevant areas

If you are passionate about revolutionizing payments in the NFT space and possess the skills and experience outlined above, we invite you to join us in our mission at Crossmint.
Benefits

• Highly competitive location-based compensation (p90th for role and title based on pave.com statistics).
• Relocation reimbursement if you don't live in NY/MIA
• Unlimited, flexible PTO.
• Company laptop and quarterly allowance for any necessary home equipment.
• Daily stipend for commuting to the office.
• Free meals in the office.
• Company-paid trips for annual off-sites and team bonding.
• Flexible work schedule.

Our Principles

• Results and delivery: we value shipping: high quality and impactful code. We don't care how you get it done.
• Build for the long term: we value building systems that stand the passage of time: scalable, secure, and reliable solutions.
• Extreme Ownership: we look for individuals with high agency, self motivated and driven who can own their projects end to end and help push the company forward.
• Be a team player: we look for kind individuals who can work in a team effectively, and also upskill the team they work on. In this role we specifically value mentorship ability..

Department Engineering Role Full Stack Engineer Locations New York City Remote status Hybrid Employment type Full-time

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