Backend engineer in experimentation platforms

Constructor is the next-generation platform for search and discovery in e-commerce, built to explicitly optimize for metrics like revenue, conversion rate, and profit. Our search engine is entirely invented in-house, utilizing transformers and generative LLMs, and we use its core and personalization capabilities to power everything from search itself to recommendations to shopping agents.

• Build and maintain backend services for experiment assignment, logging, and report generation.
• Improve scalability, performance, and reliability of experiment reporting pipelines.
• Add product-facing features to the UI to help users launch experiments and interpret results.
• Take technical ownership of projects: shape solutions, break down work, and drive execution with the team.
• Participate in a weekly on-call rotation (investigating occasional issues and answering internal questions).

• Strong experience building and owning production backend services in Python.
• Experience with monitoring, alerting, and debugging user-facing systems.
• Strong SQL skills and confidence working with data-heavy systems (metrics, logging, analytics).
• Ability to ship maintainable software (tests, code review, incremental delivery).
• You take ownership: you can turn ambiguous problems into an executable technical plan.
• You care about building systems people trust and rely on.
• Будет плюсом: Experience with experimentation systems, metrics platforms, or A/B testing workflows; Experience with PySpark and/or Databricks

• Unlimited vacation time - we strongly encourage all employees to take at least 3 weeks per year.
• Fully remote team - choose where you live.
• Work from home stipend - we want you to have the resources you need to set up your home office.
• Apple laptops provided for new employees.
• Training and development budget - refreshed each year for every employee.
• Maternity & Paternity leave for qualified employees.
• Work with smart people who will help you grow and make a meaningful impact.
• Base salary: $80k–$120k USD, depending on knowledge, skills, experience, and interview results.
• Stock options - offered in addition to the base salary.
• Regular team offsites to connect and collaborate.