Senior Software Engineer - JavaScript Developer at Leanplum
San Francisco, CA, US
About Leanplum
Leanplum is a mobile engagement platform that helps forward-looking brands like Grab, Tinder, NBC, and Tesco meet the real-time needs of their customers. By transforming data into an understanding of users’ needs and wants, our platform delivers unified experiences that are timely, tested, and relevant — building customer loyalty that fuels business growth.
Founded in San Francisco, Leanplum has offices across the US, Europe, and Asia, and has received more than $98 million in funding from leading Silicon Valley Venture Capital firms. Leanplum has also been recognized as Fortune’s Best Companies to Work For and Entrepreneur’s Best Entrepreneurial Companies in America.
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Our Culture
At Leanplum you’ll meet employees from 22 countries and counting.
We house a world champion air guitarist, three medalists from programming competitions, and several loyal office dogs who greet you at the door with tails wagging. Past perks have included company vacations to Mexico and Tahoe, Alfred Hitchcock movie nights, and costume parties. But most of all, we believe in gratitude, collaboration, and karma

About This Role

    • As a Senior JavaScript Engineer, you are a technical leader on your team.
    • You can independently scope technical solutions and drive a project from beginning to end.
    • You are passionate about developing secure and efficient features into our JavaScript SDK.
    • You have extensive knowledge and experience with core JavaScript, including ES6 improvements.
    • You love interacting with your colleagues and value collaboration.
    • Your communication skills are as good, or better than your engineering skills.


    • Develop features to support Leanplum’s JavaScript SDK
    • Work with designers and product managers to deliver best-in-class customer and user experience
    • Work closely with backend engineers to drive cross discipline products to completion.


    • Computer Science degree or equivalent
    • 4+ years of experience with browser APIs, core JS development and client side API development
    • Excellent understanding of concurrency in JSPractical experience working with different data models, browser storage and caching
    • Experience with client-server security
Perks & Benefits
Competitive salaries
Health, vision, and dental insurance
Flexible time off
Peer bonuses
Delicious and healthy catered meals
Happy hours and Unwind celebrations
Amazing array of snacks and Kombucha on Tap!
Very Dog Friendly!
Leanplum is an equal employment opportunity employer for all applicants and employees.  
We do not unlawfully discriminate on the basis of race, color, religion, sex