Hybrid Senior Front-End Engineer – Web, Hybrid Mobile, Capacitor

at S4 Capital Group

• Job title: Senior Front-End Engineer – Web, Hybrid Mobile, Capacitor
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: Android, Cypress, GraphQL, Ionic, iOS, JavaScript, Jest, React, React Native, SCSS, TypeScript, Vue.js, Webpack
• Location requirements: Hybrid, Colombia

About the role

• Senior Front-End Engineer at Monks developing modern web applications using Capacitor. Building hybrid mobile apps and collaborating on production-ready interfaces across web and mobile.

Responsibilities

• Build and maintain hybrid mobile applications using Capacitor (and similar frameworks).
• Integrate Capacitor plugins for camera, notifications, secure storage, deep links, geolocation, and other native features.
• Manage native iOS and Android project layers (Xcode, Android Studio), ensuring compatibility, proper versioning, and modern platform standards.
• Implement mobile-specific UX behaviors such as gestures, app lifecycle handling, offline flows, and native-like navigation.
• Collaborate with product and design teams to ensure hybrid apps achieve native-quality interaction patterns.
• Prepare iOS builds using Xcode, provisioning profiles, signing identities, and TestFlight distribution.
• Prepare Android release builds (AAB), signing configurations, and Play Console uploads.
• Coordinate all metadata, screenshots, privacy forms, versioning, and compliance requirements for both stores.
• Manage Data Safety (Google Play) and App Privacy (App Store) documentation based on how the hybrid app uses platform APIs.
• Maintain release pipelines, internal/external testing tracks, rollout procedures, and regression validation.
• Document and optimize processes for continuous release readiness.
• Develop high-quality UI components using React, Vue, or similar frameworks, with strong TypeScript and modern build tool experience.
• Implement responsive layouts, modular UI architecture, reusable components, and design system consistency.
• Optimize performance for both browser and WebView environments, including bundle size, rendering efficiency, and perceived performance.
• Debug complex issues spanning JavaScript, native WebViews, device capabilities, networking, and mobile OS constraints.
• Integrate REST/GraphQL APIs, including authentication flows, pagination, caching, and proper error handling.
• Collaborate on API contracts with backend teams and support monitoring around API reliability.
• Ensure mobile apps properly handle offline states, reconnection, retries, and data consistency.
• Write and maintain automated tests (unit, component, end-to-end) using frameworks such as Jest, RTL, Cypress, or Playwright.
• Participate in code reviews, architecture discussions, and cross-functional collaboration with design, QA, and product teams.
• Diagnose issues across the full stack, including JavaScript, native bridges, network layers, and build processes.

Requirements

• Strong proficiency in modern Front-End engineering: JavaScript/TypeScript, React or similar frameworks, bundlers (Vite/Webpack), CSS/Sass.
• Production experience with Capacitor (or Ionic/Cordova/React Native WebView equivalents) in shipped mobile apps.
• Experience managing native iOS and Android layers for hybrid apps (Xcode, Android Studio).
• Proven ability to publish and maintain apps on App Store and Google Play Store, including signing, versioning, metadata, and submission workflows.
• Solid understanding of WebView behavior, mobile performance, offline-first patterns, and mobile-grade UI.
• Strong debugging abilities across devices, browsers, and mobile environments.
• Experience with API integrations, authentication patterns, and robust API error handling.
• Git workflows, CI/CD pipelines, and automated testing practices.

Benefits

• Professional development opportunities
• Remote work options