Company Name: Protagona

Job Details: Hiring,Remotely,in,United,States,Remote,Senior,level

Job Url: https://builtin.com/job/senior-frontend-developer/8020238

Job Description: As a Senior Frontend Developer, you will lead the development of high-performing web and mobile applications built with React and React Native. You’ll work closely with designers, backend engineers, and product owners to deliver seamless, scalable, and elegant user experiences across platforms. This role is ideal for someone who has led complex frontend projects from concept to production, thrives in a collaborative environment, and enjoys mentoring other engineers while still being hands-on with code.ResponsibilitiesLead the architecture, development, and delivery of modern web and mobile interfaces using React, React Native, TypeScript, and related technologiesTranslate product requirements and design mockups into fully functional, responsive, and maintainable UI componentsDrive technical discussions, code reviews, and architecture decisions to ensure performance, reliability, and scalabilityCollaborate cross-functionally with product, backend, and design teams to define technical approaches and timelinesImplement best practices for state management, routing, testing, and CI/CD for frontend systemsOwn the frontend build pipeline and release process for multiple environmentsMentor junior and mid-level developers through code reviews, pair programming, and technical guidanceStay current with modern frontend tools, frameworks, and best practices to continuously improve development processesDesired Skills & Experience5+ years of professional frontend development experience, with at least 2+ years leading projectsExpert-level proficiency in React, React Native, and TypeScriptStrong understanding of modern JavaScript (ES6+), CSS-in-JS, and component-driven designExperience working in monorepo or multi-platform codebases (web + mobile shared libraries)Familiarity with frontend build tools (Webpack, Metro, Vite, Babel, etc.) and package managers (npm, yarn, pnpm)Experience integrating APIs and managing complex state (React Query, Redux Toolkit, Zustand, etc.)Solid understanding of mobile-specific concerns (navigation, performance, offline mode, native modules)Demonstrated ability to lead projects end-to-end — from architecture and planning through to QA and production deploymentStrong communication skills and the ability to collaborate with both technical and non-technical stakeholdersNice to HavesExperience with Expo, Next.js, or AWS AmplifyBackground in CI/CD pipelines (GitHub Actions, CircleCI, or similar)Familiarity with design systems and component libraries