About Us

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.

About the Team

The Sponsored Listings team is building a platform for connecting e-commerce retailers and brands. In a nutshell, retail media is the product that allows a brand to buy a placement within our customer’s search, browse, recommendations, collections, or quizzes results. A comprehensive retail media platform integrates seamlessly with online retailers, offering advanced targeting, bidding, and analytics capabilities. This platform aims to enhance ad visibility, optimize ad placement, and provide robust performance analytics. Were a passionate team of cross-functional engineers who love challenges and want to make people’s lives better. We value openness, curiosity, continuous improvement, and great code. We believe that empowering everyone in a company to do what they think is best can lead to great things.

The team is new and looking for Senior Full-stack engineers who will help us build a great Customer Dashboard interface for both retailers and brands to support them.

The primary focus of this job is to design, deliver & maintain a web application in close collaboration with other engineers.

Work collaboratively with Product and Design teams to build Retail Media functionality.
Collaborate with technical and non-technical business partners to develop / update functionalities.
Communicate with stakeholders within and outside the team.
Deliver Customer dashboard features using Typescript and React, collaborating with backend services (Python and FastAPI).

Strong foundation with client-side JavaScript, computer science background & familiarity with networking principles.
Solid experience with Typescript and front-end frameworks like React.
Experience building, maintaining, and debugging full-stack web applications
Experience with Python and one of the backend frameworks like FastAPI, Flask, or Django, or willingness to learn and work with this stack
Good understanding of API design principles.
Familiarity with Service-Oriented Architecture.
Experience with relational databases, distributed systems, and caching solutions (MySQL/PostgreSQL).
Analytical skills and experience with SQL to gather insights into dashboard reports and solutions (ClickHouse, Athena).
Experience with any of the major public cloud service providers: AWS, Azure, GCP
Experience collaborating in cross-functional teams.
Excellent English communication skills.
Ideal candidate has previous experience building ad tech solutions.
Were looking for someone who can overlap with 11:00–16:00 UTC — to keep collaboration smooth across time zones.