Etsy Engineering Culture and Practices: Diversity, Code as Craft, Blameless Postmortems, Rotation Program, and Code Coverage

Series Overview – The article is part of a series analyzing Etsy's case study, focusing on the company's engineering culture, quality assurance methods, and technical transformations.

1. Diversity & Inclusion Culture – Etsy promotes a diverse and inclusive environment, encouraging varied perspectives, flexible work arrangements, information equality, a no‑blame attitude toward mistakes, and a generous allocation of 20% free time for personal exploration, all aimed at building a resilient, innovative workforce.

2. Code as Craft – Engineers view code as a craft, emphasizing craftsmanship through regular talks and workshops that share deep technical insights and best practices, reinforcing the mission of enabling people to earn a living by creating software.

3. Blameless Postmortems – Etsy adopts a blameless postmortem approach, focusing on the "what" rather than the "who," encouraging open discussion of failures, fostering psychological safety, and using incidents as data sources for learning and improvement.

4. Engineering Rotation Program – Initiated in 2010, this program rotates participants through operations and engineering teams to build empathy, broaden perspectives, and enable non‑technical staff to deploy code, incorporating theory, database sharding, and continuous deployment principles.

5. Measuring Code Coverage as a Quality Culture – Since 2017, a dedicated testing strategy team defines and tracks code coverage across PHP, Android, and iOS codebases, using automated reporting, KPI dashboards, and weekly test workshops to drive high‑quality code and transparent metrics.

Author Background – Michael Ren (任广印), a Beijing Institute of Technology graduate, has experience at Motorola, Sony Mobile, Nokia, and Microsoft Mobile, currently serving as a Test Architect at JD Retail’s Engineering Efficiency department.