Squarespace is looking to improve the performance and scalability of its media platform, which powers the upload, processing, storage, and delivery of media assets across all its products.
Requirements
- Proficiency with React, JavaScript, HTML, and CSS, including modern frontend tooling (Webpack, Babel, ESLint).
- Experience with web performance techniques, including rendering path optimizations, critical CSS, TTI, LCP, CLS, and other Core Web Vitals.
- Prior experience improving media-related performance (e.g., optimizing large images, video streaming, font delivery, CDN strategies).
- Experience working with or building internal tooling for media workflows, such as uploaders, preview tools, media transformation pipelines.
- 6+ years of professional experience in frontend development in Javascript with 2+ years of experience in backend development in any language.
Responsibilities
- Lead frontend development across media-serving interfaces and tools using React, JavaScript, CSS, and HTML.
- Integrate media APIs and optimize asset pipelines, especially around image, video, and font rendering.
- Improve rendering performance across customer-facing surfaces, applying best practices for lazy loading, progressive rendering, responsive design, and CDN-based optimization strategies.
- Work with designers, infra engineers, and product teams to build performant, user-friendly media workflows.
- Contribute to long-term architectural decisions, including media caching strategies, compression techniques, and CDN configurations.
- Provide mentorship, conduct code reviews, and shape frontend and performance standards for the team.
Other
- 6+ years of professional experience
- 2+ years of experience in backend development
- Proficiency in any backend language
- A choice between medical plans with an option for 100% covered premiums
- Fertility and adoption benefits
- Access to supplemental insurance plans for additional coverage
- Headspace mindfulness app subscription
- Global Employee Assistance Program
- Retirement benefits with employer match
- Flexible paid time off
- 20 weeks for parental leave and up to 12 weeks to care for an ill family member
- Pretax commuter benefit
- Education reimbursement
- Employee donation match to community organizations
- 8 Global Employee Resource Groups (ERGs)
- Dog-friendly workplace
- Free lunch and snacks
- Private rooftop
- Hack week twice per year
