Senior Mobile Fintech Developer / Team for Crypto Wallet App (iOS + Android + Web)

Description: We are looking for an experienced senior mobile fintech developer or a small, highly capable team to help us build a mobile wallet app for iOS and Android. This is not a basic consumer app. We need someone who understands how to build products in the fintech / payments / wallet / card / crypto space and can think beyond screens and UI. The product will involve a combination of: mobile wallet functionality transaction history and balance management card-related features crypto-related flows external payment / payout integrations secure user onboarding and account logic We are still shaping the final scope, so at this stage we want a partner who can both execute and contribute intelligently during discovery and architecture discussions. What we need from you: Strong experience building mobile apps for both iOS and Android Proven background in fintech, payments, wallets, banking, cards, or crypto-related products Ability to advise on technical architecture, not just development Experience integrating with third-party APIs Strong focus on security, reliability, and scalability Ability to move fast, communicate clearly, and work in a structured way Nice to have: Experience with card issuer / processor integrations Experience with KYC / onboarding flows Experience with crypto deposit / withdrawal flows Experience building admin / back-office tools Experience launching apps to App Store and Google Play Important: Fluency in spoken and written English is mandatory. You will be expected to participate in calls, discuss requirements clearly, and communicate professionally with stakeholders. When applying, please include: A short introduction about yourself / your team Relevant fintech / wallet / payments / crypto projects you have worked on Your exact role in those projects Preferred tech stack Whether you work solo or with a team Your availability Examples of apps or systems you have helped build We are looking for people who are senior, practical, and commercially aware - not just coders, but partners who understand product thinking and execution. If this sounds like a fit, send us a short, relevant application with examples of similar work. Price is a placeholder, exact numbers will be defined with the selected candidates. Thank you.