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Senior Software Engineer, Acuity Scheduling

Squarespace

$153,500 - $236,500
Aug 25, 2025
New York, NY, US
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Squarespace is looking for a Senior Software Engineer to work on the Acuity Scheduling platform, aiming to develop new features, improve performance, and scale the application to meet customer needs.

Requirements

  • 5+ years of large-scale full-stack software development experience using PHP, or Java, Python, Go, or another object-oriented language, with a strong emphasis on backend systems and APIs
  • Experience developing customer-facing, frontend user interfaces using React or a comparable JavaScript framework, with an emphasis on practical production usage
  • A sincere commitment to creating readable code and an understanding of database schema design, caching, and scalability.
  • A solid foundation in computer science, with competencies in data structures, algorithms, and software design practices.

Responsibilities

  • Develop new features for Acuity Scheduling, a PHP and React application, with a focus on full-stack contributions
  • Write server-side production code for our high-volume, available applications, develop rapid prototypes for new features, and guide our technical designs forward
  • Scale and improve the performance of the application and database
  • Collaborate with other engineers, product, design, analytics, and customer operations to understand why we build the features we do
  • Practice and be a mentor for disciplined software engineering (e.g. automated testing, code reviews, and writing elegant, readable code)

Other

  • Hybrid 2-3 days per week in office
  • A degree in Computer Science or related or equivalent industry experience.