Senior Mobile Engineer (React Native + Native iOS & Android)

Senior Mobile Engineer (React Native + Native iOS & Android) 📍 Remote | Full-Time | Wellnite At Wellnite, we're building the emotionally intelligent life assistant—a platform that helps people understand themselves and others, communicate better, and follow through on what matters. We're looking for a Senior Mobile Engineer who is equally comfortable building in React Native and working with native iOS (Swift) and Android (Kotlin) when platform-specific performance or capabilities require it. This is not a maintenance role. You'll be building the future of our mobile platform alongside our founders and engineering leadership. What You'll BuildYou'll work on products used by thousands of users, including: AI-powered conversationsMessaging and communicationsCalendar and productivity featuresVideo callingHealth and wellness experiencesPush notificationsOffline-first experiencesDeep native integrationsHigh-performance animationsPremium mobile UX You'll own features from architecture through production. ResponsibilitiesDevelop and maintain our React Native applicationsBuild native iOS components using SwiftBuild native Android components using KotlinBridge native functionality into React NativeImprove application performance and startup timeDesign scalable mobile architectureCollaborate closely with product, design, AI, and backend teamsReview code and mentor other engineersHelp define engineering standards and best practicesOwn production releases and ensure high app quality Requirements Must Have7+ years of mobile development experienceExpert in React NativeStrong Swift/iOS development experienceStrong Kotlin/Android development experienceDeep understanding of mobile architectureExperience publishing apps to both App Store and Google PlayStrong knowledge of REST APIsExperience integrating third-party SDKsExcellent debugging skillsStrong understanding of mobile securityExperience with Git Nice to HaveExpo experienceNative ModulesTurboModulesReact Native New ArchitectureHermesAI integrations (OpenAI, Anthropic, Gemini)WebRTCVideo streamingPush notificationsFirebaseAnalytics platformsOffline synchronizationHIPAA or healthcare experienceFastlaneCI/CD pipelinesE2E testingPerformance profiling TechnologiesReact NativeTypeScriptSwiftKotlinNestJSPostgreSQLFirebaseGitHub ActionsOpenAI APIsFigmaREST APIs What We're Looking ForWe're looking for someone who: Thinks like an ownerLoves shipping products quicklyCares deeply about user experienceCan solve difficult engineering problems independentlyWrites clean, maintainable codeCommunicates clearlyThrives in a fast-moving startupWants to build products that impact millions of people Bonus PointsBuilt apps with over 100,000 usersStartup experienceHealthcare or wellness experienceAI-first product experienceExperience scaling mobile applicationsOpen-source contributions Hiring ProcessInitial interviewTechnical interviewPaid technical trialFinal interviewOffer Why Join Wellnite?Work directly with the foundersHigh ownership and autonomyBuild AI-first productsSolve meaningful, real-world problemsOpportunity to shape the future of emotional intelligence technologyRemote-first cultureCompetitive compensation based on experienceSignificant career growth as the company scales