**This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior React Native Developer (Crypto-wallet) based in Estonia.** This role sits at the intersection of mobile engineering, fintech innovation, and blockchain technology, focused on building and evolving a high-performance non-custodial crypto wallet. You will take ownership of core user-facing features such as sending and receiving assets, transaction history, swaps, bridges, and on-ramp flows. The role also extends into advanced financial capabilities, including crypto cards, IBAN-based payments, subscriptions, and multi-provider integrations across different geographies. You will work in a fast-moving, product-driven environment where engineering decisions directly impact real user funds and global financial interactions. Ownership is end-to-end, covering architecture, development, testing, production monitoring, and continuous improvement based on real user feedback. You will collaborate closely with Product, Design, Backend, and QA teams in a highly autonomous, international setting. This is a high-impact role for engineers who thrive in complex systems and want to shape the future of decentralized finance. ### Accountabilities: - Own and evolve core features of a non-custodial crypto wallet, including transactions, balances, swaps, bridges, onboarding flows, and transaction history. - Lead the development of advanced financial products such as crypto cards, IBAN payments, subscriptions, and integrations with global card providers. - Drive end-to-end feature delivery from architecture and implementation to testing, production monitoring, and iterative improvements based on user feedback. - Collaborate with Product and Design teams to define user experience, clarify requirements, and co-create impactful fintech solutions. - Work closely with Backend and QA engineers to ensure high-quality releases, robust testing coverage, and well-documented systems. - Participate in on-call rotation to support production systems and ensure reliability of financial operations. - Produce clear technical documentation, internal guides, and occasional product demonstrations for cross-functional teams. - Contribute to architectural decisions and continuously improve system performance, scalability, and maintainability. **Requirements:** - 5+ years of frontend development experience, including at least 3+ years building React Native applications in production environments. - Proven experience working on high-load fintech or crypto applications, ideally non-custodial wallets handling real user transactions. - Strong expertise in React, React Native, and TypeScript, with solid testing practices using Jest and Detox. - Experience with modern mobile ecosystems including Expo modules and React Native tooling. - Familiarity with blockchain ecosystems, including EVM-compatible chains, Bitcoin-family networks, Tron, Solana, or TON. - Strong understanding of secure software development, especially in environments involving financial transactions. - Experience with Git workflows, CI/CD pipelines, and GitHub Actions for production deployments. - Ability to evaluate technical trade-offs and make data-driven architectural decisions. - Strong collaboration and communication skills in cross-functional, product-driven teams. - Comfortable working in an autonomous environment with end-to-end ownership. - Nice to have: experience with WalletConnect, Reanimated, Skia, Sentry, Firebase, or similar tooling. - Strong interest in AI-assisted development and automation to improve engineering productivity. - Upper-intermediate English proficiency (Russian fluency is a plus). **Benefits:** - Fully remote work in an international, agile team shaping the future of decentralized finance - Competitive salary based on experience and performance - High ownership and autonomy over technical and product decisions - Strong engineering culture focused on modern tools and continuous innovation - Career growth opportunities in a fast-scaling fintech environment - Transparent feedback culture with clear impact visibility - Opportunity to work on cutting-edge blockchain and crypto wallet technologies - Collaborative environment with product influence at the engineering level **How Jobgether works:** We use an **AI-powered matching process** to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best! [Why Apply Through Jobgether?](https://jobgether.com/how-jobgether-works) **Data Privacy Notice:** By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time. #LI-CL1