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 flow…