Senior Backend Engineer: Offsite Search Optimisation

Constructor is the next-generation platform for search and discovery in ecommerce, 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. Engineering is by far our largest department, and we’ve built our proprietary engine to be the best on the market, having never lost an A/B test to a competitive technology. We’re passionate about maintaining this and work on the bleeding edge of AI to do so.

Out of necessity, our engine is built for extreme scale and powers over 1 billion queries every day across 150 languages and roughly 100 countries. It is used by some of the biggest ecommerce companies in the world like Sephora, Under Armour, and Petco.

We’re a passionate team who love solving problems and want to make our customers’ and coworkers’ lives better. We value empathy, openness, curiosity, continuous improvement, and are excited by metrics that matter. We believe that empowering everyone in a company to do what they do best can lead to great things.

Constructor is a U.S. based company that has been in the market since 2019. It was founded by Eli Finkelshteyn and Dan McCormick who still lead the company today.
Requirements

• Strong experience building and owning production backend services in Python

• Strong SQL skills and confidence working with data-heavy systems (analytics, metrics, logging)

• Experience with monitoring, alerting, and debugging user-facing systems

• Ability to ship maintainable software (tests, code review, incremental delivery)

• Knowledge of SEO fundamentals

• Experience with APIs & auth (OAuth2, GA4 and Google Search Analytics API)

• Experiente working with non-structured data (referrers, canonical URLs, page types)

• Experience building data integrations between products

• Understanding of ETL/ELT workflows on PySpark

• 🏝️ 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

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