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Pitch, a new company from the makers of Wunderlist, is looking for a Senior Performance Engineer with deep experience in JavaScript and browser performance — if you’re interested in shaving milliseconds off of boot timings and keeping rendering at 60 fps, you’re in the right place. We love performance optimizations, metrics instrumentation, and iterating on best-practices with the rest of the frontend teams.\n\n\n\n**Who we are looking for**\n\n\n\n* 5+ years working with frontend frameworks and libraries professionally *(and have built or contributed to some is a big plus.)*\n\n\n\n* Knowledge of React (Reagent), Re-frame or similar reactive systems and their internals.\n\n\n\n* Experience with ClojureScript, functional programming and immutable data structures is preferred, but not required.\n\n\n\n* You know the weirdest parts of JavaScript and love working with it anyway.\n\n\n\n* You know your way around the performance profiling and debugging tools in your web browser of choice.\n\n\n\n* You will have the responsibility to dive into a new system to understand performance bottlenecks that excites you.\n\n\n\n* You are a strong communicator and are equally comfortable talking with your immediate team, other frontend engineers and backend infrastructure engineers.\n\n\n\n* You are ready to learn, but just as excited to teach.\n\n\n\n* You understand that the perfect solution is informed by the people who will be building on your work, rather than being purely dependent on technical merits. Empathy is a feature.\n\n\n\n \n\Please mention the words **WEATHER ABOVE DREAM** when applying to show you read the job post completely. RMTguMjA0LjU2LjE4NQ==. This is a beta feature to avoid spam applicants. Companies can search these words to find applicants that read this and see they're human.\n\n \n\n#Salary and compensation\n No salary data published by company so we estimated salary based on similar jobs related to JavaScript, React, Clojure, Engineer, Front End, Senior and Backend jobs that are similar:\n\n $60,000 — $120,000/year\n \n\n#Location\n🌏 Worldwide