Senior UI Engineer

Location: This position is remote within Colombia Huge is looking for a Senior UI Mobile Engineer with a deep specialization in Kotlin to join our team in building high-impact, user-centric mobile applications. As a Senior UI Mobile Engineer, you will serve as the bridge between design, product, and mobile technology, crafting seamless, high-performance user interfaces and robust front-end architectures. In this role, you will bring exceptional technical rigor to client projects—owning end-to-end mobile feature delivery, driving app performance, and implementing essential mobile capabilities such as push notifications, secure payment processing, and enterprise-grade mobile security. You are someone who takes pride in product craft, understands the backend integrations powering mobile APIs, and can showcase a portfolio of successfully launched applications. A successful candidate brings 5+ years of mobile engineering experience, mastery of modern Android UI architecture, solid secondary experience or familiarity with Swift (or cross-platform tools like React Native), and a hands-on understanding of cloud and CI/CD ecosystems. What You’ll Be Doing UI Craft & Architecture: Partner closely with Design and Product teams to translate complex UX/UI designs into polished, responsive, and performant Kotlin mobile interfaces. Feature Execution: Drive end-to-end integration of core app capabilities, including push notification infrastructure, payment gateways/processing, and advanced mobile app security protocols. App Lifecycle & Deployment: Own the release process and maintain build hygiene, leveraging continuous integration tools to ship updates smoothly to public app stores. CI/CD & DevOps Automation: Design and build automated CI/CD pipelines using GitHub Actions to optimize testing, build times, and deployment cadence. Backend Integration: Collaborate with backend teams on API design and documentation; leverage working knowledge of backend ecosystems (e.g., Node.js) to ensure efficient data orchestration and smooth mobile-to-API communication. Cross-Platform & Multi-Stack Collaboration: Serve as the Kotlin/Android SME while collaborating across cross-functional mobile stacks (including Swift or React Native) to ensure alignment on shared client projects. What We’d Like to See 5+ years of mobile engineering experience , with a primary focus on native Kotlin development. App Store Track Record: Demonstrated experience launching at least 2+ apps on public app stores. Core Mobile Capabilities: Direct hands-on experience implementing push notifications, payment processing (e.g., Stripe, In-App Purchases), and mobile app security best practices . Secondary Mobile Stack: Familiarity or hands-on experience with Swift (iOS) or cross-platform solutions such as React Native. CI/CD & Automation: Proven experience building and maintaining CI/CD pipelines using GitHub Actions . Cloud Infrastructure Awareness: Practical experience working alongside at least one major public cloud platform (GCP, AWS, or Azure). Backend Awareness: Strong understanding of REST/GraphQL API design, API documentation standards, and basic backend concepts (e.g., Node.js). Communication & Collaboration: Excellent written and verbal communication skills, with a collaborative mindset for working with client teams and cross-functional discipline leads. Modern UI Toolkit: Deep hands-on experience with Jetpack Compose (and interop with legacy View-based UI where needed). Identity & Security: Practical experience with OAuth2/OIDC token flows, PKCE, secure credential storage (Android Keystore), and certificate pinning. Automated Testing: Demonstrated experience with JUnit, MockK, and Espresso, and familiarity with contract testing against API specifications. WebView & Deep Linking: Experience integrating hosted third-party flows via WebView (e.g., hosted payment pages) and implementing deep links / app links. Accessibility: Working knowledge of mobile accessibility guidelines (…