Senior ML Infra Engineer, Search Systems

Etsy, Inc.; Dublin; Hybrid; EUR 98,000 - 132,000; Full time

Benefits offered by this job

Equity package

Annual performance bonus

Competitive benefits

Job summary

Etsy, Inc. is seeking a Senior Machine Learning Infrastructure Engineer for its Search Systems team.

You will own core retrieval and indexing infrastructure powering fast, reliable search experiences for millions of Etsy buyers. This full-time role reports to the Engineering Manager and collaborates with applied scientists, Data Platform, and product engineers to enhance retrieval models and ranking capabilities.

Qualifications

• Experience building production ML systems for real-time search, recommendation, or ads.
• Proficiency in Python, Scala, Java or equivalent languages.
• Experience with performance optimization for high-throughput, low-latency services.

Responsibilities

• Design, build, and maintain search backend systems and infrastructure.
• Collaborate with ML modeling teams to productionalize new retrieval and ranking models.
• Ensure reliable data pipelines, index health, and performance.
• Develop features around indexing, query execution, and ranking infrastructure to improve latency and resilience.
• Work with cross-functional partners across Search ML and Enablement Teams.

Skills

Production ML systems

Real-time search

Python

Scala

Java

System performance optimization

Caching strategies

Agentic workflows

Neural retrieval / semantic search

Transformer-based models

Tools

Python tooling

Job description

Etsy, Inc. is seeking a Senior Machine Learning Infrastructure Engineer for its Search Systems team.

You will own core retrieval and indexing infrastructure powering fast, reliable search experiences for millions of Etsy buyers. This full-time role reports to the Engineering Manager and collaborates with applied scientists, Data Platform, and product engineers to enhance retrieval models and ranking capabilities.