Senior Machine Learning Engineer: Search Quality
C
ConstructorE-commerce
Workable locations: Spain
Location: Spain
Fully remote team - choose where you live.Full-TimeSenior
Salary80,000 - 120,000 USD per year
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Job Details
- Languages
- Excellent English communication skills
- Experience
- 4+ years shipping production ML systems
- Required Skills
- PythonSQLMachine LearningPyTorchAirflowSparkA/B testing
Requirements
- 4+ years shipping production ML systems
- Experience with search, information retrieval, or recommendation systems
- Hands-on experience with fine-tuning, evaluation frameworks, and scaling LLM deployments
- Strong Python and PyTorch
- Fluency in SQL
- Fluency in data orchestration tools (Spark, Airflow)
- Experience designing and running A/B tests to validate model impact
- Excellent English communication skills
- Experience collaborating in cross-functional teams (ranking, product, data engineering)
Responsibilities
- Improve the e-commerce experience for hundreds of millions of users across the world
- Build systems that power relevance for global retailers
- Measure search quality, push it higher, and catch degradations
- Utilize fine-tuned LLMs for relevance judgment, real-time models, and deep offline analysis of query logs
- Perform LLM-based evaluation, teaching models to understand query intent, represent items, and align judgments with user behavior
- Implement real-time quality in production, including reranking, filtering, and signal computation
- Develop automated quality monitoring and agentic insights, pipelines to detect degradations and find underperforming patterns
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