Sr. Frontend Engineer - Trimbox; Remote

Who We Are

Mode Mobile builds products that allow millions of users to earn rewards from the content, communities, and experiences they already love.

Trimbox is one of Mode’s fast-scaling utility apps — a simple, high-impact tool that helps users clean their inboxes, manage subscriptions, and take control of their digital clutter.

We value innovation, collaboration, curiosity, and getting things done. We operate transparently, empower everyone to speak up, and believe great teams make great products. Trimbox is just getting started.

Our team is the heart of our culture. We value innovation, collaboration, and curiosity, with a passion for getting things done. We strive to hire and cultivate the best team members and foster a culture of open communication and transparency. We are driven and hard-working but also committed to having fun along the way. We allow OKRs to guide us, assume positive intent, sometimes agree to disagree and commit, honor our commitments, seek to accomplish more with less, and encourage everyone to speak up as our team owns our company’s success.

You can read more about our team and how we work here.

We’re looking for an exceptional Sr. Frontend Engineer to lead the design, development, and optimization of user-facing features across Trimbox’s web and mobile surfaces. You will own core UI flows, build clean reusable components, and deliver performant experiences that make inbox management fast, intuitive, and delightful.

This is a hands‑on, high‑impact role ideal for someone who loves building beautiful interfaces, optimizing performance, and shipping features that users can feel instantly. You’ll collaborate closely with backend, product, and design to bring new capabilities to market through rapid iterations and continuous deployment.

• Architect, build, and maintain frontend features for inbox cleanup, subscription management, and workflow automation
• Build scalable, reusable UI components and design systems
• Implement responsive layouts and accessibility best practices across devices
• Optimize rendering performance, page speed, code splitting, and asset delivery
• Monitor frontend performance, error tracking, and user session metrics
• Identify frontend bottlenecks and drive improvements to user experience and conversion
• Implement features for web‑first experiences with support for React Native mobile surfaces
• Collaborate with backend engineers to integrate REST APIs and real‑time features
• Work in 2‑week sprints with CI/CD and code review best practices
• Contribute to frontend architecture decisions, tooling, state management, and build pipelines
• Maintain a high standard of code quality, documentation, and testing

• 6+ years of frontend engineering experience, ideally in consumer apps, SaaS, or browser‑based utilities
• Expert‑level proficiency in React Native + Type Script (core to this role)
• Production experience with React Native or React
  
  JS (mobile required, web preferred)
• Strong understanding of JavaScript fundamentals, modern frontend patterns, and component architecture
• Experience integrating UI with APIs (REST, real‑time, or event‑based)
• Familiarity with mobile UI patterns on Android/iOS (React Native)
• Experience optimizing performance, accessibility, and rendering efficiency
• Experience with visual debugging, error monitoring, and analytics tools (e.g., Sentry, Log Rocket, Post Hog, Amplitude, Mixpanel)

• Experience designing and implementing responsive inbox or email‑related UI (e.g., email parsing UI, subscription cards, filtering, or lists)
• Experience building mobile apps with Expo platform
• Experience working in Node‑based frontend build environments (Next.js, Vite, Webpack)
• Experience building Chrome or browser extensions
• Familiarity with Firebase for auth, messaging, or real‑time features

• Experience with feature flags, experimentation, or A/B testing
• AI‑assisted development (Git Hub Copilot, Cursor, etc.)
• Exposure to design systems, storybook libraries, or component frameworks
• Experience with user session replay, heatmaps, or performance logging

• Take ownership of features end‑to‑end, from…