Senior Machine Learning Engineer: ML Recall
Constructor3 months ago
Remote, EMEASenior
Base Salary
$80k - $120k/yr
Responsibilities
- Build the retrieval layer for an ecommerce search engine, including dense and sparse retrieval models and query understanding.
- Develop end-to-end visual and multimodal search solutions such as image search, shop-the-look, and visual recommendations.
- Own deep learning models as a platform for use by other teams.
- Experiment with new model architectures and approaches, run live A/B tests, and deliver measurable business impact.
- Develop ground-truth measurement approaches for identifying missed products in search results.
- Own models end to end from problem framing through rollout.
Requirements
- 4+ years of experience shipping production machine learning systems.
- Experience with search, information retrieval, or recommendation systems.
- Hands-on experience training, fine-tuning, and evaluating transformer models.
- Strong Python and PyTorch skills.
- Fluency with Spark and Airflow.
- Experience owning a model end to end from problem framing to rollout.
- Experience designing and running A/B tests to validate model impact.
- Excellent English communication skills.
Benefits
- Unlimited vacation time, with at least three weeks per year encouraged.
- Fully remote work arrangement with the freedom to choose where to live.
- Work-from-home stipend for setting up a home office.
- Apple laptops provided to new employees.
- Annual training and development budget.
- Maternity and paternity leave for qualified employees.
- Regular team offsites.
- Stock options in addition to the base salary.
Tech Stack
Categories
About Constructor
Constructor builds an AI-powered search and product discovery platform for ecommerce retailers, marketplaces, and distributors, delivered as enterprise SaaS. Its tools power on-site search, browse, recommendations, and shopping agents to optimize conversions and merchandising outcomes. Founded in 2019 by Eli Finkelshteyn and Dan McCormick, the San Francisco–based, privately held company counts brands such as Sephora, Under Armour, and Petco as customers and raised a Series B in 2024.