Current opportunities at Zetta portfolio companies

Zetta Venture Partners
Zetta Venture Partners

Machine Learning Engineer: Recall Team (Remote)



Software Engineering
Barcelona, Spain
Posted on Tuesday, March 5, 2024

About us

Constructor powers product search and discovery for some of the largest retailers in the world, like Sephora and Petco. We serve billions of requests every day, and you’ve probably seen our results somewhere and used our product without knowing it. We differentiate ourselves by focusing on metrics over features, and reinventing search and discovery from the ground up as a machine learning challenge with the specific goal of improving metrics like revenue. We have grown several hundred percent YoY for the last 2 years and have customers in every eCommerce vertical, around the world, and spanning many languages.

We’re a passionate team of technologists 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 think is best can lead to great things.

ML recall team consistency deliver KPI lifts for our customers in search and make our DS part more transparent for our customers.

Job responsibilities

  • Build and deploy robust ML systems for search (including vector search, result filtering, related searches, etc).
  • Collaborate with technical and non-technical business partners to develop analytical dashboards that describe the impact of ML algorithms to stakeholders.
  • Improve business KPIs by using new techniques/models and validating hypotheses.
  • Help to make our system more transparent for our customers.

Candidate Profile

  • You are proficient in NLP on high level, and have practical experience with modern architectures.
  • You are familiar with classic NLP approaches
  • You are excited about using ML to build a practical search system for 200M+ requests per day.
  • You excel at Python, at least one ML/DL framework (we're using torch), have proficiency with any variant of SQL, and feel comfortable with the big data stack like Spark, Presto/Athena & Hive.
  • You have delivered production ML systems and conducted A/B tests to validate their value.
  • You are an excellent communicator with the ability to translate intuition into data-driven hypotheses that result in engineering solutions that bring significant business value
  • You love to work on performance optimization such as increasing result quality and improving code performance