Responsibilities<\/p>\n
Build and maintain the trading application in React Native \/ Expo with TypeScript: onboarding and identity verification, funding, watchlists, quotes and charts, order entry, positions and P&L, options chains.
Consume streaming market data over WebSockets: subscription management, reconnect and resynchronization, smooth rendering under high-frequency updates.
Implement authentication (MFA, biometric unlock), secure token storage, deep linking, push notifications, and third-party SDK integrations (bank linking, identity verification).
Work with the product designer and backend engineers on feature design and delivery.
Own builds, store submissions, over-the-air updates, and App Store \/ Google Play releases; monitor crashes and performance in production.<\/p>\n
Requirements<\/p>\n
5+ years of mobile development; 3+ years with React Native, including at least one consumer app shipped to both stores.
Strong TypeScript and modern React; experience with Expo tooling (routing, builds, config plugins).
Experience building real-time, high-frequency mobile interfaces; practical understanding of React Native performance (rendering, JS\/UI threads, memory, list virtualization).
Experience implementing OAuth\/MFA\/biometrics and integrating native SDKs.
Solid automated-testing and production-monitoring practices.
Comfortable making product decisions in a small team without detailed specifications.
Occasional traveling to the USA might be needed<\/p>\n
Nice to have<\/p>\n
Trading or brokerage applications, order books, financial order types.
Charting libraries, animation\/gesture and rendering libraries, E2E mobile test frameworks.
Native iOS or Android experience (Swift or Kotlin).<\/p>\n","protected":false},"excerpt":{"rendered":"
Responsibilities Build and maintain the trading application in React Native…<\/p>\n","protected":false},"author":6413,"featured_media":0,"parent":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_mo_disable_npp":"","rwu_salary_min":0,"rwu_salary_max":0,"rwu_salary_currency":"","rwu_salary_period":"","rwu_english_level":"C1","rwu_experience_months":48,"rwu_candidate_countries":"","rwu_company_type":"\u041f\u0440\u043e\u0434\u0443\u043a\u0442\u043e\u0432\u0430 \u043a\u043e\u043c\u043f\u0430\u043d\u0456\u044f","rwu_industry":"fintech","rwu_part_time":false,"rwu_source_views":167,"rwu_source_applications":30,"rwu_source_category":"React Native","rwu_source_name":"Djinni.co","rwu_source_url":"https:\/\/djinni.co\/jobs\/850182-senior-mobile-engineer-react-native-expo\/"},"job_category":[57],"job_type":[54],"class_list":["post-4021952","job","type-job","status-publish","hentry","job_category-programuvannia","job_type-povna-zainiatist"],"yoast_head":"\n