BackEnd Engineer: Experiments

About this role

Build and improve backend services for Constructor’s experimentation platform, which supports traffic allocation, exposure logging, metric computation, and experiment reporting. The role focuses on reliable, observable Python services and data-heavy systems, with occasional UI and Spark work.

About the company

Constructor is an AI search and product discovery platform for ecommerce that helps retailers improve conversion through personalized search and recommendations.

The team

Experiments team: 3 software engineers, 1 data analyst, an engineering manager, and a product manager.

Stack

What you'll do

• Build and maintain services for experiment assignment, logging, and report generation
• Improve the scalability, performance, and reliability of reporting pipelines
• Add UI features that help users launch experiments and interpret results
• Own projects from technical planning through execution
• Participate in a weekly on-call rotation

What we're looking for

• Strong experience building and owning production backend services in Python
• Experience monitoring, alerting, and debugging user-facing systems
• Strong SQL skills and confidence working with data-heavy systems
• Ability to deliver maintainable software with tests, code review, and incremental releases
• Ability to turn ambiguous problems into executable technical plans

Nice to have

• Experience with experimentation systems, metrics platforms, or A/B testing
• Experience with PySpark or Databricks

Benefits

• Unlimited vacation; employees are encouraged to take at least 3 weeks annually
• Work-from-home stipend
• Apple laptop provided
• Annual training and development budget
• Maternity and paternity leave for qualified employees
• Stock options
• Regular team offsites