Senior mobile engineer building and releasing cross-platform features across Android and iOS, with particular depth in Kotlin and Kotlin Multiplatform. The role requires production experience beyond a primary platform, mobile architecture leadership, backend collaboration, automated quality practices, and responsible use of AI coding agents.

Builds AI-powered quality platforms, testing frameworks, and scalable infrastructure across Airbnb’s native iOS and Android ecosystems. Requires mobile development experience with Kotlin, Swift, platform SDKs, and mobile test automation.

Develop and improve a high-scale fantasy sports mobile application using React Native and TypeScript. The role requires at least four years of mobile development experience, strong software engineering skills, and the ability to build performant, reliable features.

Own the release, CI, testing, stability, observability, and AI tooling that enables a high-traffic mobile trading product to ship reliably. The role requires broad consumer mobile infrastructure experience, hands-on app debugging, and strong measurement-driven engineering practices.

Build and scale consumer-facing mobile experiences for Krak using React Native and TypeScript. The role owns feature delivery end to end and requires at least three years of web or mobile development experience, with emphasis on performance, testing, and intuitive UX.

Build and own clinician-facing mobile experiences for an ambient AI healthcare platform, spanning Flutter and native iOS/Android integrations. The role requires 4+ years of mobile development experience, strong native platform expertise, and excellent product judgment.

Build and ship secure native iOS or Android features for an enterprise AI workspace, collaborating with designers and researchers to productionize advanced models. Requires extensive production mobile experience, Kotlin or Swift expertise, and the ability to work across codebases in a fast-moving environment.

Build and own complex React Native features for a high-traffic sports platform, contributing to mobile architecture, performance, testing, and reliability. The role also guides junior engineers and collaborates with Product, Design, and QA in a fully remote environment.

Build cross-platform React Native applications and native iOS/Android BLE SDKs for EEG and wearable devices. The role requires 8+ years of mobile development experience, strong UX and performance ownership, and familiarity with health data streams and regulated environments.

Build and scale patient-facing iOS and Android applications with React Native, owning features from design through release while improving architecture, performance, and quality. The role requires 5+ years of software engineering experience, strong React Native and TypeScript expertise, and mentoring ability.

Leads mobile performance engineering across iOS and Android, owning startup, rendering, runtime efficiency, networking, caching, and observability. The role requires deep large-scale mobile expertise, Swift and/or Kotlin proficiency, rigorous profiling, and technical leadership.

Build and scale mobile experiences for Treasury users, including cross-platform components, APIs, and supporting services. The role requires 3+ years of industry experience, mobile development beyond the client, strong UI/API practices, and cross-functional collaboration.

Build and own production React Native features for a high-performance mobile trading platform, spanning architecture, implementation, testing, release, and maintenance. Requires 5+ years of software engineering experience, strong JavaScript/TypeScript skills, and experience supporting iOS and Android applications.

Own and evolve the core Home experience in Hinge Health's React Native app as the senior-most engineer on the pod. Drive experimentation, server-driven UI architecture, cross-functional collaboration, and mentoring to improve member journeys, performance, and business outcomes like session bookings and retention.

Senior React Native/Expo Engineer building the primary mobile app for Mochi Health's AI-driven healthcare marketplace. Own end-to-end mobile experiences with deep HealthKit/Health Connect integrations, offline-first sync, OTA updates, and AI agentic workflows in a high-impact, onsite SF role.

Android Growth Engineer owning the full mobile funnel (install to retention and paid conversion) for Perplexity's AI products. Lead end-to-end experiments on onboarding, notifications, billing, and ASO while partnering across product, data science, and mobile teams. Requires 3+ years shipping consumer Android apps at scale with strong Kotlin/Jetpack Compose skills.

Senior Software Engineer specializing in React Native to build and scale Underdog's core betting experience across mobile and web, from slip creation to settlement. Requires 7+ years experience, cross-platform problem solving, and leadership in design and coaching.

Defines the long-term architecture and technical roadmap for enterprise mobile products across the Apple ecosystem, with complementary Android expertise. The role requires 18+ years of software development experience, including 8+ years architecting large-scale software, plus deep security and platform knowledge.

Build and scale native mobile apps for government staff/field workers and residents at GovWell, focusing on offline-first, high-reliability experiences for permitting and licensing on iOS and Android. Requires production mobile shipping experience, strong product instincts, and comfort with ambiguity in a fast-growing startup.

Senior Mobile Engineer building high-performance React Native apps for iOS and Android in a fintech wealth management platform. Requires 6+ years mobile experience (3+ in React Native), full-stack and AWS skills, with opportunity to rotate onto a forward-deployed team working directly with advisors.

Lead the migration of Hover's Inspections product from React Native to native iOS (and eventually SDK), owning technical direction, roadmap, and cross-team collaboration with Product, Design, SDK, and Mobile Core teams. Requires 5+ years mobile engineering with 2+ years native iOS experience, RN bridge layer expertise, and ability to scope ambiguous initiatives.

Lead the technical direction of Mark43's iOS platform for a mobile-first public safety application. Define architecture and roadmap, mentor engineers, drive best practices, and partner on Kotlin Multiplatform strategy for shared code with Android while delivering best-in-class native iOS experiences. Requires 7+ years experience including native iOS with Swift and technical leadership.

Senior iOS engineer shaping Neighborhoods, a new local commerce network connecting Cash App and Square. Lead cross-team mobile architecture and hands-on SwiftUI development while using AI tools to accelerate delivery, mentor engineers, and raise the technical bar.

Build and architect cutting-edge Android applications for Claude that leverage advanced AI language models. Requires deep expertise in Kotlin, Jetpack Compose, Android SDK, full-stack development, and a track record shipping high-adoption mobile apps.

Build and maintain React Native mobile apps for iOS and Android at Upstart. Collaborate with product, design, and backend teams to deliver performant, scalable user-facing features that improve the borrower experience. Requires 4+ years experience and a Bachelor's degree.

Senior Android Engineer building and evolving Reddit's cross-platform design system and reusable UI components with Kotlin and Jetpack Compose. Requires 6+ years experience creating shared UI infrastructure, performance optimization, and accessibility best practices.

Build and maintain internal React Native frameworks, tooling, and infrastructure to improve development speed, app quality, performance, and release processes for Chime's mobile app used by millions. Requires 5+ years cross-platform mobile experience (ideally React Native), TypeScript fluency, and expertise in mobile builds, CI/CD, and observability.

Lead multi-platform (iOS, Android, Web) product and front-end strategy for Pinterest Search, including Text, Visual, and Image Search. Tech-lead cross-functional teams to build delightful discovery experiences, leveraging AI for rapid prototyping while driving architecture, experimentation, and engineering excellence.

Build secure, scalable authorization and session-management infrastructure across Spotify’s native iOS and shared C++ platforms. The role requires strong C++ skills, native iOS/Swift experience or aptitude, and experience with security-sensitive systems and OAuth 2.0.

Build and architect scalable Flutter mobile applications for a modular business app platform. The role requires 4+ years of engineering experience, including 3+ years with Flutter/Dart, plus expertise in mobile architecture, performance, CI/CD, and AI-assisted development.

Design, develop, and maintain production React Native mobile apps across iOS and Android. Requires 6+ years of mobile development experience, strong JS/TS proficiency, and experience with state management and testing frameworks.

Senior Software Engineer building mobile and web wallet clients for digital identity credentials. Focus on iOS/Android development, W3C Verifiable Credentials, secure hardware APIs, and authentication protocols.

Lead mobile engineering for PrizePicks' React Native app, owning architecture, developer tooling, and complex cross-platform features while mentoring engineers and integrating with Go/Rails backends.

Build SDKs and on-device systems for native app messaging and data collection. Own cross-platform development across iOS, Android, and React Native with backend integration.

Lead frontend architecture and development for consumer-facing web and mobile apps using React Native. Drive technical strategy, mentor engineers, own release processes, and set standards for performance and design systems.

Develops polished, gesture-driven mobile interfaces in React Native for Kraken's crypto app, focusing on fluid interactions, animations, and performance optimization. Requires deep React Native expertise, interaction design sensibility, and a portfolio of shipped work.

Develop and enhance Replit's mobile app using React Native, focusing on AI-first features, UI/UX optimization, and performance for software creation on mobile devices. Requires 5+ years experience with mobile development, React Native proficiency, and iOS/Android deployment.

Develop user-facing features for the React Native mobile app, collaborating with frontend, product, and backend teams. Requires 6+ years React, 3+ years React Native, strong UX skills, and startup mindset.

Build a gesture-controlled mobile game prototype using phone camera for real-time hand movement input, owning game loop, recognition pipeline, and UX. Requires computer vision, on-device ML, or mobile game dev experience for 12-week onsite residency.

Founding engineer owning React Native mobile app for AI-powered social commerce across iOS/Android. Architects platform, integrates social/e-commerce APIs, ships real-time AI features in early-stage startup. Requires 5+ years React Native expertise.

Owns development of Kalshi's Flutter-based mobile trading app, building and shipping customer-facing features end-to-end including notifications and biometrics. Requires 5+ years experience with strong Flutter mastery and ownership mindset.

Builds delightful mobile user experiences and highly performant trading systems, collaborating with designers and engineers. Requires strong coding skills, product sense, and ability to ship fast in a meritocratic environment.

Develop and optimize production Flutter features for a high-scale mobile app, improving performance, reliability, and user experience across iOS and Android. Requires 4+ years of software engineering experience, including 2+ years with Flutter and Dart in production.

Builds and maintains Expo-based React Native infrastructure for iOS/Android apps, optimizes performance with New Architecture tools, and creates developer tooling for faster shipping while ensuring reliability. Requires 3+ years React Native experience and Expo expertise.

Designs, develops, and optimizes Bluetooth Low Energy transport layer for peer-to-peer data sync in distributed systems. Requires 7+ years experience with deep BLE expertise and mobile development in C++/C/Kotlin for iOS/Android, plus Rust willingness.

Build and optimize customer-facing Flutter applications, owning features from technical feasibility through release. The role requires strong Dart and Flutter expertise, mobile architecture experience, CI/CD and testing skills, and interest in AI-driven products.

Builds mobile SDK infrastructure for geolocation services using Kotlin, Swift, and Objective-C across Android and iOS, including cross-platform wrappers. Collaborates with customers, debugs in real-world scenarios, and ships features rapidly for high-scale usage.

Owns the mobile codebase as the first dedicated mobile engineer, building lightning-fast real-time apps for field users to capture billions of conversation events. Requires 3+ years mobile experience with React Native, TypeScript, and strong coding skills; onsite in NYC ~60 hrs/week.