When it comes to hiring blockchain developers for a fintech app, there are a few best practices to keep in mind. Here are some tips:

Focus on finding developers with experience building decentralized applications and working with blockchain protocols like Ethereum and Hyperledger. Look for candidates who have worked on fintech or finance-related blockchain projects previously. This type of specialized experience will be invaluable as they build out the technical architecture for your app.

Vet candidates thoroughly not just on technical skills but also problem-solving ability, communication skills, and ability to work collaboratively. Building blockchain-based apps requires strong analytical skills to model complex business processes and workflows.

Consider hiring contractors or consulting firms that specialize in blockchain development for fintech. They will have teams experienced in ideating, architecting and delivering blockchain-based fintech apps and can provide guidance on best practices.

Make sure to assess candidates' experience with languages like Solidity and JavaScript frameworks like Web3.js, Angular and React. These are commonly used in fintech blockchain apps. Also look for experience with Node.js, Python and RESTful APIs.

Offer competitive compensation and perks to attract top blockchain engineering talent. This niche skillset is still relatively rare compared to traditional software developers, so being attractive to candidates will yield better results.

Consider casting a wide net and hiring remotely if needed to expand your talent pool. Many skilled blockchain developers work remotely. Just be sure to have a structured onboarding and training process.

Does this help summarize some best practices around hiring blockchain developers for a fintech app? Let me know if you need any clarification or have additional questions!