Senior Frontend Engineer, Performance

Company: ClickUp
Location: San Diego
Posted on: February 24, 2026

Job Description:

At ClickUp, we’re not just building software. We’re architecting the future of work! In a world overwhelmed by work sprawl, we saw a better way. That’s why we created the first truly converged AI workspace, unifying tasks, docs, chat, calendar, and enterprise search, all supercharged by context-driven AI, empowering millions of teams to break free from silos, reclaim their time, and unlock new levels of productivity. At ClickUp, you’ll have the opportunity to learn, use, and pioneer AI in ways that shape not only our product, but the future of work itself. Join us and be part of a bold, innovative team that’s redefining what’s possible! ClickUp is seeking a technical leader in SaaS client performance, dedicated to elevating the customer experience through world-class performance solutions. As a Senior Performance Engineer, you’ll drive end-to-end strategies to optimize application speed, memory, and reliability across our entire platform. You’ll be empowered to analyze, diagnose, and resolve performance bottlenecks wherever they occur—front-end, back-end, or infrastructure—ensuring ClickUp remains the fastest, most reliable productivity platform on the market. The ideal candidate is a hands-on expert in browser and NodeJS performance, with a deep understanding of how code impacts rendering, memory, and user experience. You thrive on solving complex problems, collaborating across teams, and setting new standards for performance excellence. If you’re passionate about making a measurable impact for millions of users, this is your opportunity to lead at scale. The Role: • Lead root cause analysis on client performance issues and conduct post-mortems. • Profile application code to isolate inefficient algorithms, memory leaks, and other issues; recommend and implement fixes. • Set up performance monitoring, alerting, and dashboards to proactively identify and resolve client performance problems. • Analyze client traffic patterns, load testing results, and other metrics to establish benchmarks and drive improvements. • Advocate for performance best practices and set client performance standards across the engineering organization. • Identify infrastructure improvements (caching, CDNs, database optimization) to enhance client experience. • Collaborate with development teams to embed performance as a core requirement in new feature development. Qualifications: • 10 years of experience in performance engineering or a related field • Expertise with profiling tools for browsers and NodeJS • Deep knowledge of performance metrics, reporting, and analysis across the full stack • Strong analytical skills with the ability to interpret metrics, logs, and load test results • Advanced understanding of web/mobile architectures, HTTP protocols, caching, databases, and load balancing • Proven problem-solving skills and a passion for optimizing client experiences • Experience optimizing SQL and databases • Fluency in data structure and algorithm optimization

Keywords: ClickUp, Lake Forest , Senior Frontend Engineer, Performance, IT / Software / Systems , San Diego, California