Senior React Native Developer (Crypto-wallet)

About the role

We are looking for a Senior React Native Developer to join a fast‑moving fintech team in Switzerland. The role focuses on building and evolving a high‑performance non‑custodial crypto‑wallet, handling real user funds and complex financial flows.

Key responsibilities

• Own and evolve core wallet features such as sending/receiving assets, transaction history, swaps, bridges and onboarding flows.
• Develop advanced financial products including crypto cards, IBAN‑based payments, subscriptions and multi‑provider integrations.
• Drive end‑to‑end delivery from architecture and implementation to testing, production monitoring and iterative improvements.
• Collaborate with Product, Design, Backend and QA teams to define user experience and ensure high‑quality releases.
• Participate in on‑call rotation to support production systems and maintain reliability of financial operations.
• Produce technical documentation, internal guides and occasional product demonstrations.
• Contribute to architectural decisions and continuously improve system performance, scalability and maintainability.

Required profile

• 5+ years of frontend development experience, with at least 3 years building React Native applications in production.
• Proven experience on high‑load fintech or crypto applications, preferably non‑custodial wallets handling real transactions.
• Strong understanding of secure software development practices in financial contexts.

Required skills

• React, React Native, TypeScript
• Jest, Detox testing frameworks
• Expo modules and React Native tooling
• Knowledge of blockchain ecosystems (EVM‑compatible chains, Bitcoin‑family networks, Tron, Solana, TON)