Software Engineer; React Native + Expo – AI Fintech Platform

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Mission is a platform for hiring, vetting, and managing software development talent. It enables our clients to connect with the world’s best talent to build mission‑critical software products.

The client is a company developing the next generation of digital financial products. Their mission is to build scalable, secure, and highly customizable banking solutions that merge traditional fintech capabilities with cutting‑edge AI innovations.

With a global presence and a remote‑first culture, the client brings together specialists from finance, blockchain, and artificial intelligence to push the boundaries of what’s possible in digital money and data systems.

We are looking for a senior Fullstack Software Engineer to help build the foundation of our AI‑driven digital banking platform.

• Develop and ship production‑grade mobile and web interfaces using React Native with Expo, ensuring design precision and smooth performance.
• Take ownership of core fintech product modules such as digital wallets, payments, transaction ledgers, onboarding, and notification systems.
• Design and maintain scalable APIs and data pipelines within a serverless AWS environment (Lambda, API Gateway, Dynamo
  
  DB, Kinesis, Event Bridge).
• Integrate digital asset and stable‑value payment flows while maintaining high standards for compliance and data protection.
• Build real‑time, event‑driven user experiences using Web Sockets and server‑streaming connections, including conversational and AI‑assisted features.
• Enhance app performance and reliability using profiling and monitoring tools like Sentry and Better Stack, along with libraries such as Hermes, Reanimated, and Flash List.
• Partner with design teams to translate Figma prototypes and design tokens into consistent UI implementations.
• Apply AI‑supported development workflows (e.g., using Cursor, Claude, or related assistants) to accelerate delivery and improve testing coverage.
• Contribute to team‑wide standards for AI‑assisted development, evaluating new tools that enhance velocity and quality.
• Provide technical guidance and mentorship to peers, promoting best practices for building secure, performant, AI‑integrated fintech systems.

• 10+ years of professional software engineering experience, including 5+ years in mobile‑first or fintech applications.
• Proven experience delivering complex, secure, and high‑quality financial software in production environments.
• Deep expertise with React Native + Expo and modern Type Script development across frontend and backend layers.
• Strong background in serverless architectures and AWS cloud services.
• Understanding of secure identity management (JWT, Cognito, or comparable systems) and financial‑grade data security practices.
• Familiarity with stablecoin payment mechanisms, blockchain integrations, or payment APIs.
• Practical knowledge of real‑time networking technologies (Web Sockets, SSE).
• Experience using AI‑enhanced IDEs or developer tools in daily workflows.
• A mindset geared toward innovation and experimentation, especially around how AI changes the software development process.

Understanding of blockchain‑based transactions or tokenized payments.

Familiarity with design systems, performance optimization, and testing automation.

Experience mentoring engineers or leading small, cross‑functional development teams.

160,000 to 200,000 USD annually (depending on experience)

Mid‑Senior level

Full‑time

Engineering and Information Technology

Software Development and IT Services and IT Consulting