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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Frontend Performance Engineer - **Company:** RECRUITER EXCHANGE INC - **Location:** United States (Remote available) - **Experience:** Expert - **Salary:** $84,000.0 - $144,000.0 - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Software as a Service, Profiling, Data Structures, Data Synchronization, Memory Management, Monitoring of Systems, TypeScript, Web Applications, ReactJS, Caching, Front End Software Development - **Published:** September 5, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/pho73i09vv ## About the Role * At least 4 years of professional frontend engineering experience. * At least 4 years of experience building large-scale React applications used by thousands of users. * Experience building, maintaining, or scaling a product used by at least 100,000 monthly active users. * Strong experience with React, TypeScript, JavaScript, and modern browser APIs. * Proven experience significantly improving frontend performance in production. * Deep understanding of browser internals, rendering pipelines, the event loop, memory management, and JavaScript performance. * Experience with caching, virtualization, lazy loading, preloading, state management, and data synchronization. * Strong hands-on experience with Chrome DevTools or similar profiling and performance-analysis tools. * Experience building custom frontend infrastructure, internal frameworks, or performance tooling. * Strong computer science fundamentals, including data structures and algorithms. * Experience working on products where speed and responsiveness were important business objectives. * High engineering standards and strong attention to detail. * Professional English communication skills. ## Description We are looking for a Senior Frontend Performance Engineer to help build one of the fastest web applications in the SaaS market. This is not a standard frontend development role. You will own performance across a large-scale React application, designing advanced rendering and synchronization systems, eliminating production bottlenecks, and building custom performance infrastructure where existing frameworks or libraries are not sufficient. The ideal candidate treats frontend performance as a core product capability and has hands-on experience improving startup time, rendering speed, interaction latency, scrolling performance, memory usage, and the overall responsiveness of complex web applications., * Design and implement advanced rendering and data synchronization systems. * Identify and eliminate performance bottlenecks in production. * Improve application startup time, interaction latency, scrolling, rendering, and perceived performance. * Optimize browser memory usage and eliminate UI freezes and rendering jank. * Design caching, preloading, lazy-loading, virtualization, and predictive-loading strategies. * Build custom performance infrastructure when existing libraries or frameworks are insufficient. * Use browser and application profiling tools to investigate complex performance issues. * Collaborate with product and engineering teams to ensure new features meet performance standards. * Establish performance benchmarks, monitoring systems, and engineering best practices. * Benchmark the application against some of the fastest SaaS products on the market. ## Related Videos - [Profiling Symfony & PHP apps with Blackfire](https://www.wearedevelopers.com/videos/265-profiling-symfony-php-apps-with-blackfire) - [HTTP headers that make your website go faster](https://www.wearedevelopers.com/videos/1676-http-headers-that-make-your-website-go-faster) - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [To New Frontiers: The Future of Frontend Development](https://www.wearedevelopers.com/videos/404-to-new-frontiers-the-future-of-frontend-development) - [Enhancing Workload Security in Kubernetes](https://www.wearedevelopers.com/videos/356-enhancing-workload-security-in-kubernetes) - [Event based cache invalidation in GraphQL](https://www.wearedevelopers.com/videos/433-event-based-cache-invalidation-in-graphql) ## Related Articles - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)