Full-stack Engineer - Wallets/Minting

🔥 The Opportunity

Crossmint is democratizing onchain development—we’re the Stripe for blockchain, powering:

• 40+ chains, FaceID/email logins, gasless transactions, and AI agent infra.
• Used by top projects to onboard millions without crypto jargon.

As a Full Stack Engineer, you’ll ship the plumbing for the onchain internet—scalable, secure, and so simple it feels like magic.

Think: “How do we make self-custody as easy as TikTok sign-ups?”

🎯 Key Responsibilities

1. Build & Scale

• Ship high-impact code (APIs, SDKs, multi-chain smart contracts).
• Design systems that handle millions of txs without breaking a sweat.

2. Own End-to-End

• Lead projects from docs → deployment → iterating with users.
• Mentor teammates and troubleshoot during on-call shifts (1-2x/quarter).

3. Shape the Stack

• Optimize for Web2 devs (e.g., abstract away RPC nodes, gas fees).
• Leverage AI to automate audits or streamline wallet recovery.

🔍 Who We’re Looking For

✅ Must-Have Skills:

• 3-5+ years full-stack experience (JS/Java/Python/etc.).
• Web2 excellence: Can build scalable backends and polished UIs.
• Ownership mindset: Thrives in autonomous, fast-paced environments.

✅ Nice-to-Haves:

• Web3 exposure: Smart contracts, wallets, or blockchain APIs.
• Open-source cred: Shipped high-star repos or popular npm packages.

🌟 Why Join Crossmint?

• Backbone of onchain apps: Your code powers the next 100M users.
• Elite comp: Top-tier salary + equity + crypto-native perks.
• Flexible & human: Unlimited PTO, home office stipend, no AI interviews.
• Global team: Offsites in Lisbon, Miami, or your pick.

Interview Process

1. Technical Screen (45min): Chat code, architecture, and Web3 pain points.
2. Take-Home (Flexible): Build a mini cross-chain auth flow.
3. Team Fit (60min): Meet your future crypto-nerd colleagues.

Stand Out By:

1. Audit Crossmint’s docs with 2 UX improvement ideas.
2. Share a project where you abstracted complexity elegantly.
3. Explain how you’d make wallet recovery grandma-friendly.

Key Upgrades vs. Original:

• Sharper positioning: “Stripe for blockchain” > generic “developer platform.”
• Added urgency: “Millions of txs” underscores scale.
• Trending hooks: #AccountAbstraction, #AIAgents for algo traction.
• Candidate prep: Tests problem-solving, not just checkboxes.

Ready to build the onchain future? 👷♀️

Inclusion Note 

Skills can be learned—apply even if you match ~75% of requirements. Crossmint celebrates diversity and bans AI interviews.

⚠️ Fraud Alert: We only use @crossmint.com, @crossmint.io, or @paella.dev domains.