Senior Machine Learning Engineer: ML Recall

Constructor
United Kingdom
Workplace: RemoteFull timeUSD 80,000 - 120,000 annuallyFunction: Data Science & Machine LearningSkills: ["Communication"]

Build and improve the retrieval layer of an AI-first ecommerce search engine to ensure shoppers’ desired products are returned for any query and language, with millisecond latency. Own search recall and visual/multimodal solutions such as image search, “shop the look,” and visual recommendations. Experiment with new deep learning architectures, run A/B tests on live traffic, and help create measurement by building ground truth for missed results.

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FursaFursa
Constructor
Constructor
3 months ago

Senior Machine Learning Engineer: ML Recall

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Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 13 hours agoStatus: Live

Job Summary

Build and improve the retrieval layer of an AI-first ecommerce search engine to ensure shoppers’ desired products are returned for any query and language, with millisecond latency. Own search recall and visual/multimodal solutions such as image search, “shop the look,” and visual recommendations. Experiment with new deep learning architectures, run A/B tests on live traffic, and help create measurement by building ground truth for missed results.
Location: United Kingdom
Workplace: Remote
Employment Type: Full time
Job Function: Data Science & Machine Learning
Seniority: Mid level

Key Responsibilities

  • •Develop the retrieval stack for search recall using dense/sparse models and query understanding under strict latency constraints.
  • •Build end-to-end visual and multimodal search solutions including image search, “shop the look,” and visual recommendations.
  • •Own models end to end, from problem framing through rollout and operationalization.
  • •Experiment with new deep learning architectures and approaches, and run A/B tests on live traffic.
  • •Create ground truth and measurement to detect missed products that are not returned and leave no logs.

Pay and Benefits

Salary: USD 80,000 - 120,000 annually
Equity and Bonus:Equity
Perks:Paid LeaveRemote WorkHome OfficeLearning BudgetEquity

Key Requirements

  • •4+ years shipping production ML systems.
  • •Experience with search, information retrieval, or recommendation systems.
  • •Hands-on experience training, fine-tuning, and evaluating transformer models.
  • •Strong Python and PyTorch, with fluency in data orchestration tools like Spark and Airflow.
  • •Experience owning a model end to end and designing A/B tests to validate model impact.
Experience:E-commerce
Skills:Communication
Languages:English
Tech Stack:PythonPyTorchSparkAirflowTransformer models

Company Brief

Constructor
Provides an AI-powered site search and product discovery platform for e-commerce and retailers, improving search relevance, recommendations, personalization, and merchandising to boost conversions and average order value.
Industry: Enterprise Software
Company Size: Medium (51 to 250 employees)
Growth: Growth Stage Startup
Headquarters: San Francisco, United States
WebsiteLinkedIn