Senior Frontend Engineer, Performance

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:

• 8+ 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
• Strong background in performance engineering, including bottleneck analysis and root cause identification.
• 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

Bonus Points We believe strong engineers can pick up new technologies quickly; experience with any of the following is a plus:

• APM and RUM tooling (Datadog RUM/APM/DBM or similar)
• AWS, Kubernetes, CDN technologies
• PostgreSQL, RDS/Aurora, DynamoDB (or comparable systems)
• TypeScript and modern JavaScript frameworks
• Performance testing frameworks and tools (for example Locust, memlab, or equivalents)
• Python (or another scripting language used for automation/tooling)

Unsure if you meet all the qualifications of this job description but are deeply excited about the role? We hire based on ambition, grit, and a passion for improving the way people work. If you think ClickUp is the company for you, we encourage you to apply! At ClickUp, we assess every candidate based on the potential impact they can have. We hire the best people for the job and support each person’s journey to build their boldest career. Equal Opportunity Employer ClickUp is an Equal Opportunity Employer, and qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, or national origin. Privacy Notice ClickUp collects and processes personal data in accordance with applicable data protection laws.

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Visa Sponsorship Please note we are unable to sponsor or take over sponsorship of an employment visa for roles outside of engineering and product at this time. Sponsorship for engineering and product roles is not guaranteed, but is instead based on the business needs for that specific role at that time. Please reach out to the recruiter with any questions. Fraud Alert ClickUp Talent Acquisition will only initiate contact via an @clickup.com email or through our official careers portal on clickup.com. We will never request fees, payments, or sensitive personal information. Please disregard any offers received outside these channels and report them to support@clickup.com. Compensation Range: $160K - $210K