Constructor
BackEnd Engineer: Experiments
Constructor
$80k - $110k
Remote - Spain
Python
FastAPI
PostgreSQL

BackEnd Engineer: Experiments

Overview

Constructor is the next-generation platform for search and discovery in ecommerce, built to explicitly optimize for metrics like revenue, conversion rate, and profit.

Job Description

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.

Responsibilities

  • - 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)
  • - Collaborate closely with Search/Recommendations engineers, ML/DS partners, and customer-facing teams when needed.

Required Skills

  • - 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)
  • - Mindset: You take ownership: you can turn ambiguous problems into an executable technical plan
  • - You care about building systems people trust and rely on

Benefits

  • - 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–$110k 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

About the company

Constructor’s AI-powered search and product discovery platform delivers unmatched KPI optimization and fast ROI for enterprise ecommerce brands — while giving customers a personalized, enjoyable shopping experience.


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