Senior Frontend Performance Engineer – React

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🔥 5 minutes ago

🇪🇺 Europe – Remote

⏰ Full Time

🟠 Senior

💻 Frontend Engineer / Web Developer

👻 Ghost score 25%

What it means: the chance that no one is really hiring for this job.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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iDelsoft

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2019

💼 Consulting

📣 Marketing

📦 Logistics

Consulting • Marketing • Logistics

iDelsoft is a technology partner based in Tampa, specializing in software development and building dedicated teams for high-growth companies. They offer a range of services including custom application development and talent search, ensuring high-quality solutions that save businesses from costly disruptions. With a focus on startups and enterprises, iDelsoft aims to provide scalable and reliable technology solutions tailored to specific business objectives.

📋 Description

• Own frontend performance across the entire application, including startup time, interaction latency, scrolling, rendering, memory, and perceived performance • Design and implement advanced rendering, caching, preloading, and data synchronization systems • Build custom performance infrastructure where existing libraries and frameworks fall short • Profile and eliminate bottlenecks and UI jank using browser and application profiling tools • Work with feature teams to ensure new functionality maintains performance standards • Continuously benchmark the product against the fastest SaaS applications in the industry

🎯 Requirements

• 4+ years of frontend engineering experience, including 4+ years building large-scale React applications used by thousands of users • Proven track record of significantly improving application performance in production • Deep expertise in React, TypeScript, browser internals, rendering, memory management, and JavaScript performance • Extensive experience with caching, virtualization, lazy loading, data synchronization, and state management • Experience building custom infrastructure or frameworks — not just wiring up existing libraries • Strong computer science fundamentals and algorithms; exceptional engineering standards and attention to detail • Experience on products where performance was a primary business objective • Experience with WebAssembly, workers, or other advanced browser performance techniques • Experience at a startup or fast-moving product company • Contributions to performance tooling or open-source frameworks

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