Rapidly scaling fintech/crypto start-up seeks a highly skilled Mobile App Engineer to own the development, optimization, and evolution of their mobile application.
Key Highlights
Technical Skills Required
Benefits & Perks
Job Description
Mobile App Engineer – Finance/Crypto Start-Up
Location: Fully Remote (U.S.-based)
Compensation: Competitive, DOE (Depending on Experience)
About the RoleOur client, a rapidly scaling fintech/crypto start-up, is seeking a highly skilled Mobile App Engineer to own the development, optimization, and ongoing evolution of their mobile application. This role is ideal for someone who thrives in fast-paced environments, values clean, secure code, and is excited to build user-centric experiences in a regulated, high-stakes financial ecosystem.
You will play a critical role in architecting and enhancing mobile features, improving performance, and ensuring world-class security and reliability. The ideal candidate is comfortable collaborating across engineering, product, and design teams, with a strong understanding of modern mobile frameworks, API integrations, and crypto-related UX considerations.
Key Responsibilities- Lead development of new mobile features from concept to deployment across iOS and/or Android.
- Maintain and improve existing app performance, architecture, code quality, and accessibility.
- Integrate the mobile app with backend services, APIs, authentication systems, and blockchain/crypto components.
- Ensure the app meets security, compliance, and privacy standards required in financial/crypto environments.
- Collaborate with Product and Design teams to create intuitive, user-friendly mobile experiences.
- Conduct thorough mobile testing, monitoring, and troubleshooting to ensure reliability and minimize crashes.
- Optimize for scalability, speed, and smooth user flows as the app and user base continue to grow.
- Implement analytics and instrumentation to measure performance, usage insights, and conversion funnels.
- Participate in agile ceremonies—sprint planning, code reviews, standups, and retros.
- Stay current on mobile development trends, emerging tooling, and best practices in fintech and blockchain UX.
- 3–5+ years of professional mobile app development experience (iOS, Android, or cross-platform).
- Strong proficiency in one or more of the following:
-Swift / SwiftUI
-Kotlin / Jetpack Compose
-React Native
-Flutter (Dart)
- Experience integrating RESTful APIs, WebSockets, or GraphQL.
- Solid understanding of mobile performance optimization, app lifecycle, and state management.
- Experience with secure authentication flows (OAuth, JWT, biometrics, MFA).
- Familiarity with financial data, crypto transactions, or blockchain technologies (highly preferred).
- Strong understanding of mobile UI/UX principles and design systems.
- Experience working within CI/CD pipelines for mobile deployment.
- Comfortable working in a fast-paced start-up environment with evolving priorities.
- Experience publishing and managing apps in the Apple App Store / Google Play Store.
- Knowledge of blockchain wallets, seed phrases, and secure key handling.
- Experience with mobile app analytics tools (Firebase, Amplitude, Mixpanel, etc.).
- Exposure to compliance-driven environments (KYC/AML, SOC 2).
- Prior experience at a fintech, crypto exchange, or digital asset platform.
- Strong communication skills and ability to translate technical concepts for non-technical stakeholders.
- Proactive, solutions-driven, and comfortable owning initiatives.
- Highly organized with strong attention to detail.
- Able to thrive in a remote, collaborative environment.